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MGA Twin Cam ENGINE Tech
Also see TC General Info and TC Chassis and TC Off-site Links pages.

Cross section drawing of Twin Cam engine TC-300 - Twin Cam Engine GENERAL DESCRIPTION
TC-300A - Twin Cam GOLD SEAL ENGINE
TC-300B - THINGS THAT ARE BLACK on the Engine
  MG-282 - Remedies for possible complaints (csm)
  MG-288 - Remedies for possible complaints (Cancels MG282) (csm)

TC-301 - CARBURETOR FLEX MOUNTS, Problem
TC-301A - CARBURETOR FLEX MOUNTS, Solution 1
TC-301B - CARBURETOR FLEX MOUNTS, Solution 2
TC-301C - CARBURETOR FLEX MOUNTS, Solution 3
TC-301D - CARBURETOR FLEX MOUNTS, Solution 4
TC-301E - CARBURETOR FLEX MOUNTS, Solution 5
  MG-238 - Fuel octane requirements (csm)
  MG-264 - Carburetter damper piston (csm)
TC-301M - INTAKE MANIFOLD CHANGE, SU Carburetors
TC-301W - INTAKE MANIFOLD For WEBER Carburetors

TC-302 - CAMSHAFT EXCHANGE
TC-302A - TAPPETS, Short, Long, Sleeves, and Material
Chain driven camshafts TC-302B - Cylinder Head WELDING
  MG-251 - Fitting camshaft bearing caps (csm)
  MG-253 - Tappets, sparking plugs (csm)
  MG-276 - Tappet clearance (csm)

TC-303 - ENGINE ASSEMBLY NOTES
  MG-257 - Timing cover gasket (csm)
TC-303B - ENGINE ASSEMBLY PHOTOS
TC-303C - PISTON-VALVE CLEARANCE
TC-303D - DOWELS in the Timing Cover and Engine Front Plate

TC-304 - IGNITION CURVE
TC-304A - IGNITION CURVE, Early Vacuum Distributor
TC-304B - Original DISTRIBUTOR for MGA Twin Cam
  MG-248 - Distributor clamping (csm)
  MG-296 - Piston failure (new distributor) (csm)
  MG-301 - Campaign change of distributor (csm)

TC-305 - WATER PUMP
TC-305H1 - WATER HOSE, Radiator to Water Pump
  MG-234 - Water loss (csm)
TC-306 - CLUTCH PRESSURE PLATE ASSEMBLY
  MG-275 - Crankshaft, flywheel and clutch assemblies (csm)
TC-306A - SUBSTITUTE CLUTCH PARTS And MGB Clutch
TC-307 - CRANKSHAFT REPLACEMENT
  MG-309 - Main and connecting rod bearings (csm)
  MG-416 - Crankshaft thrust washers (csm)
TC-308 - AIR CLEANER CHANGES
  MG-286 - Air cleaner venturi (csm)
TC-308A - AIR FILTER ELEMENT Substitute
TC-308B - CRACKED AIR CLEANER BASE
TC-308C - AIR CLEANER DECAL
  CB-303 - Cold Air Intake Assembly - See Carburetors.
TC-309 - LOCKTAB for CRANK DOG NUT
  Drawing - LOCKTAB for CRANK DOG NUT
(110-KB pdf)

TC-310 - PISTONS, High Compression for the Twin Cam
  MGA-P-01 - MGA Twin Cam 9.9 CR Piston Drawing
(400-KB pdf)
  MGA-P-02 - MGA Twin Cam 9.9 CR Piston Skirt
(120-KB pdf)
TC-310A - PISTONS, Low Compression for the Twin Cam
TC-310B - PISTONS, Sources for the Twin Cam
TC-310C - PISTONS, How They Burn, Twin Cam
TC-310D - PISTONS, Running Clearance, Twin Cam
  MG-231 - Connecting rod assemblies (csm)
  MG-236 - Connecting rod assemblies, (Cancels MG231) (csm)
  MG-240 - Piston scraper rings, oil pump drive spindle (csm)
  MG-252 - Connecting rod assemblies, (Cancels MG236) (csm)
  MG-262 - Connecting rods (csm)
  MG-278 - Piston rings (csm)
  MG-307 - Piston rings (csm)
  MG-325 - Piston Failure (csm)
  MG-344 - Piston Failure (Cancels MG325) (csm)

TC-311 - VALVE KEEPERS, Special
TC-311A - VALVE SPRINGS, Uprated
  MG-310 - Valve springs (csm)
TC-312 - CAM COVERS, Cracks and Sealing
  MG-257 - Timing cover gasket (csm)
TC-313 - AERODYNAMIC NUTS for Intake
TC-314 - Dynamo Mount, FAN AND PULLEY
  MG-237 - Fan belt dynamo pulley (csm)
  MG-237A - Fan belt dynamo pulley, corrected (csm)
TC-314A - Dynamo Mount, REAR BRACKET With WEBER CARBS
TC-315 - Crankshaft REAR SEAL for Twin Cam
TC-316 - SU H6 CARBURETORS Photos and Notes
TC-317 - SHIMS For Tappet Adjustment
TC-318 - TENSIONER for Timing Chain
TC-318A - TENSIONER with Timing Chain Too Long
TC-319 - Cylinder Head GASKET for Twin Cam
TC-319A - Cylinder Head GASKET, Copper Side Down

TC-320 - 1762cc Twin Cam ENGINE
  T.I.M. No. 35 - 3.1/8" bore Twin Cam (1760cc)
- (0.1-MB pdf)
  TheMGA Twin Cam 1762cc (actualy 1760cc) Engine - Facts, Myths and Questions
- (1.1-MB pdf) - (posted by permission of the author)
TC-321 - 1800cc - 1950cc Twin Cam ENGINE
TC-321A - 5-Main Bearing 1800+ Twin Cam Engine
TC-322 - OIL COOLER PIPES, for Twin Cam Engine
TC-324 - THERMOSTATS for the Twin Cam
TC-325 - Coolant REMOTE PRESSURE RELIEF VALVE
TC-326 - MISALIGNED COMBUSTION CHAMBERS in the Twin Cam Head
TC-327 - ENGINE BLOCK and Main Bearing Cap Numbers, Twin Cam
TC-328 - INSTALLING the Twin Cam Engine
TC-330 - RUNNING-IN A Rebuilt Twin Cam Engine
  T.I.M. No. 33 - TUNING Information Memo 33
- (4.1-MB pdf)
TC-340 - WEBER CARBURETORS For MGA Twin Cam
TC-341 - AIR CLEANERS For Weber Carburetors #1
TC-342 - AIR CLEANERS For Weber Carburetors #2
TC-350 -NEW CYLINDER HEAD CASTING for the MGA Twin Cam

os - Adjusting TAPPET CLEARANCES
- YouTube 7:55
os - SPECIAL TUNNING for MGA the Twin Cam
os - WEBER SETTINGS for MGA Twin Cam
os - Hot Rods For Abingdon - Four One-Off Twin-cam MG racing engines
os - Developent of an MGB Twin Cam
- (0.5-MB pdf)

Also see TC General Info and TC Chassis and TC Off-site Links pages.

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