The MGA With An Attitude
Monday April 1, 2024:
Friday April 5, 2024:  Good morning garage at Larry Peck's place in rural Blaine, Tennessee. There was his MGB GT with a non-functioning clutch after conversion to a Datsun 280Z 5-speed gearbox, with all of the Datsun clutch parts. He had been spending too many days attempting to bleed the clutch slave cylinder with not much luck, clutch still not working. 
He had another new slave cylinder, but it didn't fit the bolt pattern on the bellhousing, as the first slave had been slotted inward to fit bolts with closer hole spacing. The expedient solution was to move the working parts of the new cylinder into the old cylinder body. In retrospect, maybe even that was not necessary, as we then discovered it was still impossible to bleed the air or fluid. Mityvac didn't work, as it appeared to be drawing in air around the bleed screw threads, and no fluid was drawn through. The normally bullet proof method of pumping pedal with finger over the bleed nipple to serve as a check valve was also not working, as no air at all was being expelled with each stroke of the pedal. The problem was, the new clutch master cylinder was not moving any fluid at all on the first stroke. And the chore of R&R of the clutch master cylinder for bench bleeding was more than daunting. So we decided to pressure bleed it, with whatever tools were at hand (failure is not an option). We found an old hand pump the looked very much like a vintage Sooty pump that was optional accessory
Then we were on to the brake lights that always stayed on, meaning the normally closed brake switch was never being depressed. Seemed like a simple adjustment, until we tried it. With the switch screwed all the way in it still didn't work. So removing the steel shell draft cover and using a tape measure, we soon discovered the pedals were not installed properly. The pivot assembly was missing some flat washers, and the bolt was left loose, leaving a large gap at the inboard side of the brake pedal hub. Disconnect two pedal springs and remove the pivot bolt. Find a few more thin flat washers, and reassemble it with a flat washer on each side of each pedal, and put it all back together with the bolt tight. Pedals then fixed not to wobble sideways, brake pedal aligned with the switch, switch properly adjusted, and the cover reinstalled, brake lights working properly. Score another one for the good guys. 
 It was a longer day that we had anticipated, so good time to quit and head in for a very late lunch. Then take the rest of the evening off to chat and have a good time with friends. Saturday April 6, 2024: 
Up for breakfast and a little more chat before we had to head out. Nearly an hour to make our way out of the mountains down to US-11W and TN Hwy-126 (Alcoa Highway). After fighting our way through an ever evolving construction zone (with a few more LBC following the blind leader). we made only one wrong turn. Then an inquiry at a construction shack, and back on route. A few minutes later crossing some unmarked rail road tracks to get into Skyranch Airport, a little place with grass runway and a few hangers for light general aviation planes. 
 
Ah, there's the gang we were looking for. This is the 19th April Fools Bash, a "multi-club gathering and general good time", hosted this year by Appalachian British Car Society and East Tennessee British Car Club. Rousting around for a while I counted at least 50 little British cars and close to 100 people all here for picnic and to have a good time. Yes it is a car show, but no formalities, no judging, no trophies, just plenty of time for chat and tire kicking. I even bumped into a few transplants from Chicagoland MG Club. 
 One car I parked near to was a Datsun 1600 roadster (310 series) not technically British, but surely showing the serious British heritage underneath with most of the mechanical parts being interchangeable with MGA and MGB. Windscreen, doors, tail lights could all be directly swapped onto the MGB. The fun fact is, this Datsun model beat the MGB to market by a few months in 1961. 
 Another car that caught my eye was the Lotus Evora GT. I knew what it was,just couldn't remember if I had ever seen one before. 
 
Then I just walked and took more pictures. I suppose we can recognize most of these cars. 
 
 
 There was one slightly odd car (that I was crawling underneath). It was a dead ringer copy of an Austin Healey 3000, including all of the badging, but with fiberglass body, heavily flared wheel arches, wide wheels and tires, and a V8 engine. It is a rather convincing Sebring kit car. It apparently hit a rather serious bump or pothole and crept into the show with the left rear tire rubbing on the fiberglass wheel arch. As we were diagnosing a broken leaf spring, and trying to figure out how to get the car towed without driving it out, a nice middle age chap introduced himself and proceeded to provide the solution. Say hello to Jesse Lehn (last picture above), who has just opened a new classic car repair shop called European Classic Motorworks in Maryville, Tennessee last January. Gotta get that card, and we will go visit his shop as soon as we take care of the broken car. A friend of Jesse's was soon headed out and returning with a flat bed trailer. 
When we left we took a short side trip to a local WiFi spot, mostly to kill an hour, then headed over to Jesse's shop. We arrived before the Silverstone on the trailer, and had time for a tour of the new shop. This is the lower level and mechanical service area for what used to be a car dealer. The right side bay was a paint shop a long time ago, and Jesse will soon be converting it back to a paint shop again. The center area about three bays wide is open workshop, and he will soon be installing a car lift. To the far left is an elevated storage space over lots of gravel fill. On the wish list is (maybe) to remove the gravel and turn that space into another work bay (big job with low priority at this time). 
 
There are already a couple of young (I think) assistant technician type fellows, so the business is off to a good start. The flat bed trailer showed up to unload the Silverstone Austin Healey 3000, and the guys were
getting that into the shop and up on jack stands for a look underneath. Elliot and I were jacking up the MGA for a lube job, quick and easy. We were also changing out the silly 1.5-ohm ignition coil with a ballast resistor that I had installed in late June 2022 as a diagnostic move. The dang thing was stuck together with Duck Tape and jumper wires, but it had held up okay for nearly two years. Now it was finally giving us intermittent ignition problems and had to go. We reinstalled the Lucas Sport Coil removed in 2022 that has otherwise been in service since late 1997 (if it ain't broke don't fix it). 
 In the hour or so that we were here, a few drive-by folks stopped in to inquire about possible service for their classic cars, so it looks like good prospects for business picking up. And Jesse is still young enough that he is likely to be here for many years to come. --- About 40 miles west we found another WiFi spot at a truck stop in Lenoir City, TN, just short of Knoxville. Sunday April 7, 2024: After breakfast, just getting a good start on photos and notes for the past few days, it soon dawned on us that we had other plans we had nearly forgotten about, so this was turning into a travel day. By mid day we were heading west on I-40, stopping for fuel after 50 miles. Then ran right past Nashville and northwest on I-24. We crept, stopped and crawled through two long traffic delays on the interstate highways. When the evening sun was in our eyes it was a good time to stop for fuel again, and dinner and WiFi in Calvert City, Kentucky, just east of Paducah. Turn the clocks back an hour for Central Time. Now I could get to the backlog of photos and notes. A short dash of heavy rain about 10-pm, hoping the weather and/or cloud cover would not spoil our plans for tomorrow. By the time I got the photos and notes posted (above) it was 1:30-am, and we still had some driving to do, so back on the road for some night cruising. Monday April 8, 2024: Short patches of heavy fog in the valleys, not too bad. We crossed the state line from Kentucky to Illinois at 2-am, and stopped to check out the Illinois Welcome Center (and rest stop). The place was full of trucks beyond max capacity (not unusual) with a few trucks spilling over into the car park area. Also totally jammed with cars, some over the curbs parked in the grass, and not a single spot left big enough to park the MGA. On the way out there were more trucks parked on the shoulders which were obviously posted "No Parking" (also not unusual). Forget a second pass, we just moved on up the road. By quarter of three we were rolling into Marrion, IL, and accidentally blundered into another Love's Travel Center that was not in the list of the Garmin GPS (very fortunate). Find one parking spot, and set the alarm to get five hours sleep. Alarm ringing at 8-am, at least we slept well. Good morning, solar eclipse day. Pretty good sun, looking like the clouds may burn off okay. Unfortunately the truck stop WiFi didn't work for me, so we headed 10 miles west into Carbondale, Illinois. The first WiFi spot there didn't have any power outlet.The second one (a few miles back east) was good for power and WiFi, so we were in for breakfast by 10-am. Sitting here nearly dead nuts in center of the travel path for the full eclipse. Partial eclipse to begin 12:42pm-CDST with full eclipse to be 1:59-pm lasting for a bit more than 4-minutes, followed by partial eclipse for another hour and a quarter. Do not look at the sun without a 99.999% opaque solar filter, but we can look at it for a few minutes during the total eclipse with only the sun's corona showing around the limbs of the moon. There is a solar eclipse festival going on in town, but we won't bother with that crowd. Fog gone before noon, only a few wisps of clouds near the horizon, looks like a fine day for the total eclipse. Check to assure the camera is charged and working, and now we wait. All pictures taken with a cheap compact digital camera, automatic exposure and no flash (not wanting reflection from local atmosphere, only incoming light). While the camera was pointing directly at the eclipse, I was not looking at the sun. My eyes were shaded behind my ball cap and left hand while I was looking at the camera display screen. Manual-setting clock in the camera was 7-seconds behind my auto-setting cell phone. The image time stamp is in one minute increments, so the actual time could be up to one minute later, depending on how far into the minute it was at time of snap. Pictures are in chronological order, so when you see two with the same time stamp, the second one is later than the first one. 
 1:30-pm
1:56-pm
1:57-pmFirst contact at 12:42-pm. Ambient light appears to be nearly full sun until more than half of the disc is covered, so the first picture at 1:30 is still pretty much full bright with lots of refraction in the atmosphere making it look quite large. 1:56 and 1:57 are still a couple minutes before full eclipse, but that is when dimming is progressing rapidly. Next picture 1:58 below is the only one to appear with the dark moon and bright contrasting corona around it. I believe that is the last picture with enough light to make a brisk click with no noticeable time delay. The next couple of pictures had a notable shutter delay for a short time exposure of about half a second. I suspect the second 1:58 picture with brighter face and little corona showing is as close to full eclipse as can be, with the apparent bright face being due to earth light being reflected back from the face of the moon. Sorry, no fancy instruments, so no center exclusion disc was available. I had more pictures in between, but left out some that looked like near duplicates with not much change. In the 2:00 picture, the brighter background implies longer automatic time exposure, which could also mean the brighter face could still be increased earth shine reflection. 
 1:58-pm
1:58-pm
2:00-pmBy 2:02 corona is increasing on the exit side, so the last few pictures look like the reverse of the first row (after which it got much brighter very quickly). I gave it my best shot with the pocket camera and no special tools. I'm sure there will be lots of professional photos posted soon on the internet. I'm just happy that we had a mostly clear day with no clouds in southern Illinois. Just lucky I recon. 
 2:02-pm
2:02-pm
2:03-pm
 Tuesday April 9, 2024: Sitting in Ina, IL today, for rain, rain, rain. But I did get some new Part Number pages uploaded for the MGA 1600-MK-II tail light lenses, and the special shoulder screws to secure them. Wednesday April 10, 2024: A little farther north today in Effingham,IL. Rain stopped for a while, but still threatening heavy for the rest of today and tomorrow, so we are not in a hurry to go anywhere. We were planning on Wednesday Night Garage Club in Lagrange Highlands, IL (west suburb of Chicago), but still a few hours away with other things to do, so that's a weak maybe.  Posted a new tech page for a paint stripper that actually works. It is called Carbon-Off, marketed specifically for removing baked on carbon from metal surfaces. The information seems to avoid the word "paint" (which may be an environmental dodge). but it works very well as a paint remover as well. Safe for all metal surfaces. And it has been shown to work successfully on fiberglass body panels with no degradation, so it may be good for molded and laminated plastic parts too. Then a few pending and developing problems got worse, all at once. My computer WiFi antenna link has been getting progressively weaker, only able to pick up a few of a long list of WiFi "network connections". Reloading the latest WiFi driver update makes no difference. Elliot's computer works fine on WiFi, but as of 7-pm mine is no longer finding most network connections, and certainly none of the "free WiFi" links at restaurants or truck stops. Ready to leave Effingham, and the car didn't want to start (coming on and getting worse for a while). It was running okay at road speed, above 2500-rpm, doesn't like to idle for long, and doesn't like to start when cold, and it's also raining wet. It fakes like it wants to start, but no go. Nearly ran the battery down cranking before I though maybe a sniff of starting fluid might help, but then it was cranking too slow. We got a jump from another vehicle and got it running. Wanting to drive long enough for the alternator to recharge the battery, we stopped for fuel in Mattoon, IL, keeping the engine running while filling up. Continuing on we discovered a relatively new Love's Travel Center in Tuscola, IL (that was not in the Garmin GPS data set), and stopped there for the night. Battery was showing 14-volts when we switched off. Time for late dinner and more computer tinkering. No difference there either, can't even see the Loves customer WiFi signal, like there was no WiFi router, even though Elliot's computer does find it and works well. Give up for the night, try again in the morning. Thursday April 11, 2024: Computer still ill, no difference this morning. I suppose my 2012 vintage computer that I bought in 2014 has finally developed one too many insurmountable problems, and it's time for a new computer. We will run into Champaign, IL today (assuming we can get the car started). Between Walmart and Best Buy we should be able to buy a new computer. This is likely to keep me off line for a while. likely a few days for WiFi and FTP reconnect, and more like a few weeks by the time I can reload programs and data and reconfigure everything I use regularly, and find new programs compatible with a new operating system. A little car work before starting this morning, removed the air cleaners. Needing to reinstall a vacuum pipe broken at the carburetor end. Don't know how long it has been broken. The car was running well on the 2nd when Elliot passed his driving test. Ran a little odd on the 6th, until we changed the coil, then ran okay. Ran funny again on the 8th (eclipse day), which is when we found the broken vacuum pipe. I managed to remove the compression nut end broken pipe end, leaving the small venturi vacuum port on the cab open, I don't think that's enough leak to cause the magnitude of the current problem, hard starting and bad running below 2500-rpm, but we will cover all the bases in turn. Then it started raining again, so didn't get the pipe fixed yet. But we did get it started, and drove up to Savoy, IL (south suburb of Champaign) to buy a new computer at Walmart. Between 1990 and 2014, I bought nice computers for big bucks, but never had one that would last more than four years before dying for various odd reasons. When I bought the laptop computer in 2014 I bought two year old technology for cheap on clearance sale, because it was more advanced than anything I needed. But then it lasted for 10 years until the operating system (Windows 8.1) was no longer supported. This time instead of buying cheap, I spent more for what seems to be the latest tech stuff. All new computers now have lots of RAM and use flash memory for storage instead of a mechanical hard drive, so I got the most of both. Elliot's one year old computer is now jealous. Most new computers no longer have a mechanical CD-Rom drive, which is okay with me, because I have never used mine in the past ten years anyway. Fairly recently new computers still had an SD card slot, which I do use for the flash memory card in my compact digital camera (now also old tech). Some new machines do still have an SD slot, and/or a mini-SD slot, but this new latest tech machine does not have any SD slot. Solution there was to buy a cheap SD and Mini-SD card reader that plugs into a USB port. Also picked up a new cloth cover bag to fit the new slightly larger computer. Then we continued on to a Road Ranger truck stop at north edge of Champaign (familiar territory) where we knew there was a good WiFi spot. Lunch first, then playing with the new computer from mid day to 10-pm closing time. First issue was getting past a stupid Microsoft log-in page where MS didn't accept my existing password and insisted on sending me an email message with a verification code to reset the password. But of course my old computer couldn't log into WiFi, so no access to email to receive the message (Catch 22). Elliot's computer was on-line, but he doesn't have the right program to log into the POP box on my web site server to download my email. That could kill hours to move software from my machine to his and get it configured to work. The solution then was to create a new e-mail account for me on Hotmail, let MS send the verification code there, and retrieve it with his computer. Cute. All that screwing around just to receive a single email message, and it only killed two hours before enabling boot-up and log-in to the new computer. Beyond that, we spent the rest of the day going through lots of set-up parameters to configure look and feel and how things should work, mostly trying to make the new set-up similar to the old computer, so there is not too much of a culture shock when coaxing the new machine to do everything we need it to do. And it was still cold and raining, so we were not trying to fix the car. But finally a high note for the day. When I switched on the old computer to begin migrating software and data to the new machine, waddayano, the thing actually logged into the local WiFi link. So I set the new machine aside long enough to check email and BBS, and very soon this report will be on line for you to be reading it (like now). Enjoy. Friday April 12, 2024:  Still cold, but the rain stopped, sky is trying to clear up, and there are prospects for clear and sunny and a bit warmer this afternoon. Meanwhile, breakfast and catching up with stuff (other than the new computer). -- Uploaded a new Part Numbers page for the AEH460 Thrust Washer for MGA Twin Cam oil pump drive gear spindle (and other parts of the T.C. oil pump assembly). As expected, sunny and dry by 2-pm, so I went out to take a whack at fixing the car. The sun was nice, but 55dF and high winds still feels cold, even with two sweat shirts, but I was going to persist. Had some trouble refitting the vacuum pipe to the rear carburetor, even with the air cleaners removed. When I dropped and lost the tiny little olive compression fitting, and only had one more spare, I couldn't take any more chances, so I removed the front carburetor for better access. More fiddling, and I dropped the second olive, but got lucky and found that one several feet away in front of the right front wheel. More persistence, and I finally got the vacuum pipe properly installed, and reinstalled the front carburetor. Then fire it up to see what else might be ailing it. Yeah, it was still hard to start, and still ran like crap below 3000 rpm. Once it warmed up some I reduced idle until it began to misfire a bit. Since the air cleaners were off, I tried the hand test over the air intakes. Either one would kill the engine, but with only partial restriction they seemed to act a bit different. So I unscrewed the dashpot dampers, and they work with plenty of oil inside. When I hit the throttle, both dampers jumped up with nearly equal vigor, maybe slightly different. Then I tried the mild hand choke test and got dramatically different results. One damper would jump up normally, while the other one would sometimes jump down. Huh? That had me checking for a couple of minutes to see if there might be a loose throttle disc, or some obstruction in the throat, but none of that found. Conclusion then is the downward jump must have been a misfire or a backfire in the intake tract. I then started pulling HT spark wires to see where it was missing. 1, 3 and 4 okay, but no fire on #2. Use screwdriver to ground #2 wire to a head bolt, and found no spark on #2. That made me feel better, as it was likely an ignition problem, not something major mechanical. Not likely to be a failed HT wire, because these are solid core wires with silicone covers, fairly new and very durable. Pull the dizzy cap and get out the DVM continuity tester. Check #2 first, and it beeped. Say what? I had anticipated that it was going to be open circuit at the cap end of the HT wire. All five wires tested good from inside the cap to the plug terminal end. By then I was 99% certain I knew the problem. A little more poking around with the ohm meter told me I was right, and it is one of my long standing pet peeves about poor quality replacement parts. Some time ago (maybe a few decades) some idiot procurement officer thought it might be a good idea to source distributor caps with aluminum contact posts rather than brass, to save a penny per terminal or a nickle per assembly. Unfortunately, it actually works when first installed on the car, so customers may seem to be satisfied, until they find out otherwise later. With running time the aluminum HT posts undergo electrolytic corrosion with constant spark arcing from rotor tip to posts in the cap. Surface of the alloy post eventually corrodes from pure aluminum to aluminum oxide, similar to iron rusting. But instead of material disappearing, the aluminum oxide stays put and turns into a good corrosion inhibitor. Unfortunately aluminum oxide is also a very good insulator, so once the surface is converted the HT spark has to find another path to ground, so it sparks to one side of the terminal post. Eventually the whole near side of the post gets converted, and the spark has to reach farther around to the side or back of the post to find ground return. The longer the spark path the higher the resistance, so it finally starts to misfire with lower voltage at the spark plugs. Getting only worse with time, eventually it runs like crap, or not at all, which is where we are today. I have another new distributor cap in the Magic Trailer, but I am now here to prove a point. You can often fix this problem well enough to get running and drive it away (for a while). Get out the pocket knife, and start digging with a sharp point and scraping with a sharp edge. With persistence you can likely scrape away the corrosion layer to expose virgin aluminum on the face of the terminal posts. Put it back in the car, and it will run again. Indeed I did, and it did. The car was back to easy starting, smooth idling, and strong pulling on the road. Now I need to see if I can determine exactly when this dizzy cap was put in service, and how many miles it accrued to time of failure. Then I can install the new one to continue testing time and distance. 
 Before and after scraping. Notice the corrosion before, and the oxide dust and mirror reflection in the surface after cleaning. I always knew these alloy posts in a dizzy cap were crap, but it's hard to convince the world when there are no alternative parts with brass posts. Scarborough Faire has original type side entry caps with brass posts, but I prefer top entry caps, and all sources I know of only have alloy terminal posts in those parts. But keep hunting. Okay, now that it is fixed, stop worrying and get back to computer work. Saturday April 13, 2024: Car didn't want to start again this morning. Half a compression test on two cylinders, okay. Navigator suggests trying a new condenser, probably not the problem, but maybe do it to narrow the field of possibilities. Remove dizzy cap, pull off the side wire, loosen clamp bolt 1/2 turn, and pull out the distributor. One minute, and much easier than trying to work on it in situ. Look inside to find the contact points not opening. Really, you think that might have something to do with it? Adjust points to approximate thumbnail size gap, about 30 degrees open 60 degrees closed (dwell), another minute well spent. Reinstall/realign distributor, tighten clamp bolt 1/2 turn, reconnect side wire, and reinstall the cap and HT wires. What was that, about five minutes start to finish, including putting the wrench and screwdriver away? Fired right up and ran perfectly. kick myself for not fixing this sooner, but it had been raining incessantly, this being the first decent weather day since Tuesday. Now trying to remember last time we adjusted the points. Out of adjustment way too soon I think, curse Lucas. The Mallory distributor was much more robust, going much longer without needing adjustment. I recon the "modern" points with red plastic rubbing foot kind of suck. The older tech points with phenolic rubbing foot must be much more durable. Log it into the service log, and pay more attention to points adjustment frequency. Sitting in Gilman, IL. After breakfast and email check, time to get onto configuration of the new computer, and boy was I surprised at how much I got done today. Some of it was quite a struggle, but now done. The new computer now has my Quicken accounting package with all current and historical data, my favorite browser, spell checker, FTP (file transfer for the web site server), Notepad, Wordpad, calculator, file explorer, and links to BBS and a YouTube link (it's just me). -- Still needing to transfer my off-line email program with the multi-megabyte spam filter file that I have been building for 20 years (very important). Still needing Open Office to do the normal office clerical work, and transferring bunch of my historical data files to go with it. And then the biggie, transferring my whole web site mirror image to the new computer (could easily take at least half a day just for the data transfer). And then a data backup? (sheesh). Check back later. Sunday April 14, 2024: Closed out of our WiFi spot in Gilman at 11-pm last night, so we moved along to post-midnight dinner in Dwight, IL, Then got some much needed sleep. Up early this morning, still in Dwight, and back to new computer configuration and data loading. First task today was transferring my good old Eudora 7-something software from the mid 90's for downloading email from a POP box on the mail server for off-line reading and editing. Where I had anticipated this old software might be a big problem on a modern operating system, it turned out to be pretty easy. Back in 1994 it was placed in the root directory of my hard drive, running under DOS with very simple hardware and software architecture. Like an old car, the simplicity is endearing. I copied the entire Eudora folder to the new machine, including the set-up info and up to date data. This included my 30-year accumulation of 6.8-MB filter file than throws most of the incoming spam and scam and junk mail into the dust bin. When I clicked on the desktop icon for email, it opened right up, accessed the mail server with the correct username and password, downloaded my incoming email, filtered the garbage into the trash bin, and sorted the good stuff into a few categorizing boxes. Wow. Perfect on the first pass, and it wasn't even lunch time.
Monday April 15, 2024: Last night, downloading website to hard drive, got through about 45,000 travel log images before closing. got the other 10,000 pics this morning, as well as the rest of my website downloaded. Now I can edit my trip long on the new computer. Smile, this is the first day you see this page update sent from the new computer. -- Beginnig to like the new computer, very quick start up and shut down, quick opening and closing programs, more stuff fits the higher resolution screen (but smaller). speaker output is much better fidelity, and the webcam actually works (with a very good picture). Oh, the battery life is 6 to 7 hours, almost no noticeable heat coming out of the cooling fan, very small battery, very small wall charger with tiny wires, which I suppose all stems from higher efficiency electronics using much less power. Amazing how technology has improved in the past 10 years. Now downloading the CMGC web site from server to hard drive (all the stuff I was doing there for 20 years before the new website committee started changing everything). This is going well by early afternoon, so at least it looks like it will finish today (maybe). There are also thousands of photos on the club website, so that's going slow. -- Time to be installing a bunch of shortcut icons on the desktop for stuff I do regularly, until the new screen might look more lke the old screen. Rather like moving house, but don't have all the furniture in yet. I installed Zoom and got that working, because John Twist was be doing a Zoom tech on line this evening. The Zoom session ran from 6-9-pm, after which we rolled out promptly for next appointment. One hour later we were in Sandwich, IL to visit daughter to pick up Elliot's spiffy new drivers license (and two voter ID cards). Then a quick snack with fuel stop on Plano, IL, and landing in Naperville, IL later night. |
Added a Part Numbers tech page for the silly 
