The accessory spin-on oil filter adapters mount to the engine block in place of the original filter assembly, and they use the same square section rubber o-ring to seal against the engine block. The adapter will attach to the block with a single bolt, and the bottom end of that bolt will have a male thread that accepts the spin-on filter. The bolt should be locked in place with a lock tab washer with initial installation. When changing this type of oil filter the bolt to the block and the upper o-ring are not disturbed, so the filter can be changed without worrying about the o-ring. In this case the o-ring should get changed about as often as other internal engine gaskets. Perhaps whenever the oil sump is removed would be a good reminder to change the oil filter adapter o-ring. Or more likely this o-ring will only be renewed if the engine block is removed for machine work. At any rate you must replace this o-ring when installing the spin-on adapter, and be sure to remove any remnants of the original o-ring first.

Spin on oil filter adapter on left. - Original oil filter mount on right.
Notice that the spin on adapter does not have a pressure relief bypass valve,
so the spin on oil filter element must have a pressure relief bypass valve built in.

Shown above is the Moss Motors spin-on oil filter adapter kit 235-940. This requires the shorter pipe from the late Tecalemit or Purolator canister. The longer pipe from the one-piece early Purolator canister will not fit. As with the original installation, the banjo bolt on the right can be replaced with a hose adapter, and the pipe can be replaced with hoses for an oil cooler installation.

Photo above shows what happens if you try to use the connector pipe from the early Tecalemit one-piece filter canister. After reforming the pipe to get the banjo bolt aligned, the back to front pipe run is not horizontal, because the vertical run is too long.

Filters which can be used with the hanging spin on adapter:

AC PF-56, PF952 (short) AC-Delco PF1232, PF2121, PF2123 AC Delco Ultraguard Gold UPFL-400A AGCO 72213533, 72257947 Amsoil ASF57, EAO58, SDF57 Atlas M-59 Autopar FE147 Autopro 2374 Baldwin B228 Beck/Arnley 041-8121, 041-8798 Big A 92288, 92339, 92374 BMW 11 42 1 258 039, 11 42 1 278 059, BMW 11 42 9 061 197 Bomag 5710631 Bosch 72107, 72129 (short), Bosch 72-143, 72161 Canadian Tire 17-1744-6 CarCare OF3816 CarQuest 85288, 85319, 85374, 85516 Case 6911953 Casite CF3614 Caterpillar 3I-1191 Cenex CO2816 Champion C104 (short), OF301, OF417 Champion Laboratories PH2816 Crosland 529 (short), 691 Delphi FX1017 Deutsch D364 Deutz 1163420, 1164626, 1174416, Deutz A04H4123 Donaldson P502022, P550227, P550534, P559059 Evergard E183 Facet 346, L-183 Fiaam FT4756 Filters Incorporated OF3816 Flag C-2870, C-2951 Fleetguard LF3338, LF3766 Fleetrite LFR-83338 + Fram PH3512 (short) + Fram PH-3600 + (Fram PH-3614) Fram PH3816, PH46 + Full   PH-400 Gehl 132023 Gonher GP3816 Goodyear 222-4523 Grand Prix PH2816 Grease Monkey GM346 Group 7 L10168, V183 GUD Z85 Halfords HOF200 (short) Hastings LF155 Havoline TFC-519 IAPCO A-0210-002, OF20 International Parts Services 4-1081 International Parts Services 4-1097 International Parts Services 4-1100 IPD 10013, 10139 ITM 11-11300, 11-12002, 11-12300, 111-2002, 111-2300 Jiffy Lube HL3816, HL46, JL183, Jiffy Lube L10183

John Deere HE1220338 K&N   HP-2009 Kendall K19 Knecht AW14-1 Kralinator L210A, L33, L38 Lazorlite L11-1015, L11-1279 Lee LF-2816HP, LF-42 Lombardini 2175040 Luber-Finer PH2816 Lucas Girling F6496, F6615, F691 Mann W7.12/4, W712/20, W712/4, W712/6, W719/36, W814/99, W920/21 Marathon MO2816 Marathon-Letourneau MO2816 Master Parts PH-2816 Mechanics Circle MOF 3816 Melroe 6665603 Micro F-201 Mighty L10168, M183 Mobil L10168, L10183 Mobil-1 M1-209 Mopar L-519 Moss 235-950 Motaquip VFL123 (short) Motorcraft FL-276, FL-313 (short), FL400A, FL 262, FL 776 MPA 4010 MWM-Murphy MD-438-13 Napa 1288, 7085 - Napa Gold 1516 New Holland 276514 Nissan 15208-H8916 Onan 122-0338, 122B-338 Original Equipment Plus OF-556 Parts Master 61374 Parts Plus PH2816 Performax PO-130 Phillips 66 PO258,PO28 Power Flo SL20252 Pro/Gauge PGO-183 Purflux LS115 Purolator L10101 (short) (was PER 101), Purolator L10168, L10183, L20064 Purolator L20195, PL20195 Quaker State L10168, PO-115, PO-130, QS3816 Sears 45197 Security PH-3816 Service 1 OF183 Shell L10168, SH519 STP S3816, SO-400 Unipart GFE173 (short), GFE443 Unocal PF2816 Valvoline L183 Vera 10-00405, 10-50405 VW Group 035 115 591 Warner PH2816 Wix 51288 - Wix 51335 (short) Wix 51374 - Wix 51516 Wix 57085

Note: There has been a problem with the Moss hanging spin-on filter adapter for some time (many years). Some of the above listed filters will jam onto the adapter and cause problems with removal. See the faulty parts report. Until this problem is resolved, be careful about which spin-on filter you use with this adapter.

+/-   Those marked "+" are known to fit. Those marked "-" are known to jam.

There will be a few other aftermarket spin-on oil filter adapters on the market. The one shown here attaches below the original filter head for late the Tecalemit canister type filter, which incorporates a pressure relief bypass valve, so the spin-on filter canister does not need an internal pressure bypass valve. This is a neat idea, but it depends on the presence of the original Splash Plate on the Filter Head, a part that is sometimes missing. Note that the "Splash Plate" part is originally crimped in place and should not be removable. Since the spigot diameter on the Purolator filter head is smaller diameter, this T.A. spin-on adapter cannot be used with the Purolator head.

THINK Automotive ltd

FITTING INSTRUCTIONS
SPIN ON FILTER ADAPTERS

To compensate for variations in the filter head tolerances the Spin On consists of three parts Spin On Inner and Outer and an O-ring. The variations in tolerances are taken up by the Spin On Outer sliding over the Spin On Inner. The integrity of the seal between the Inner and Outer is maintained by an O-ring.

Fitting instructions for kit number FC289 MG A & B.

a. Remove the existing oil filter bowl & sealing ring.
Leave the Splash Plate in position.

b. Fit the extension screw (item 2) to spigot (item 1). Fit the large dia seal (item 6) to the Filter Head.

c. Apply grease to the O ring (item 5) and then fit the Spin On assembly (item 3).

d. To assure that the inner O ring (item 5) is seated correctly slide the Spin On Outer over the Spin On Inner so that the outer seal face sits back from the Filter Head seal when the unit is assembled to the Filter Head.

e. Secure the assembly to the Filter Head with the spigot and extension screw assembly, tighten the spigot until the O ring contacts the seal face then tighten a further 1/4 of a turn. Push the Spin On Outer home. The oil seal between the Spin On Outer and the Filter Head will be created when the Oil Filter is fitted.

f. Fit the Oil Filter in accordance with the manufacturers instructions. Re-tighten after running 100 miles.

We recommend oil filters with 3/4" UNF thread and anti-drain valve, eg Fram PH966.

8318FI Issue 2

Kit of parts

1 off Spin On Assembly (item 3)
1 off O ring 3.53mm dia (item 5)
1 off Seal (item 6)
1 off Spigot (item 1)
1 off Extension Screw (item 2)
 

Think Automotive 292 Worten Road Isleworth, Middlesex, TW7 6EL, England.

Tel: +44 0208 568 1172 Fax: +44 0208 847 5338 Email: info@thinkauto.co.uk

USA Distributor: Brithsh American Transfer - Satasota, Florida, USA

Here are pictures of bottom side of the original Purolator filter head with and without the splash plate. There will be 3/32-inch space between the splash plate and the bottom flat surface of the filter head. Oil enters at the long projection port on the left, passes downward through the square hole, then passes outward between the head and plate, then down around the outer edge of the splash plate, then radially inward through the filter element, and finally upward through the center hole into the engine block. The smaller round hole on the right side is the passage to the pressure relief bypass valve (in case the filter element may be clogged enough to not pass the full flow of oil).

This splash plate should be staked in place as a permanent part of the filter head so it does not fall off when the filter is being changed. If the splash plate is missing then a filter element can sit directly against the filter head, in which case the filter element might block part of the inlet or bypass port or might allow oil to bypass the filter element without being filtered. Missing splash plate may also defeat proper fitting of the spin-on adapter shown above. Also note that this particular Think Automotive spin-on adapter will work with the late Tecalemit filter head but will not work with the Purolator filter head (because of the different diameter of the center spigot).

MOCAL

SPIN ON FILTER ADAPTERS FITTING INSTRUCTIONS MODEL: MG TD/TF MGA MGB KIT: One adapter plate     One 2 piece extension screw     Two large sealing rings     Two small O seals and one small sealing ring     METHOD. Clean all dirt from filter area. Remove existing filter bowl and sealing ring. Examine the boss on the filter head into which is screwed an oil pipe. This boss will have one of the following cast in:     A: "Purolator"     B: "Tecalemit Filter No FA2126"     C: "Tecalemit Filter No FA2724"     Unfortunately they all have slightly different dimensions and to achieve a seal both on the outside large sealing ring and also on the center raised portion of the filter head, different combinations of seals have to be used. These are:     A: 2 small O rings & 1 small sealing ring with thicker large sealing ring     B: 1 small O ring with thinner large sealing ring     C: Same as A

    If any doubt exists about the correct combination having been chosen, we suggest a trial assembly as per the illustration but with a small amount of wax, plasticine or even chewing gum placed on the outer ring of the adapter and the center raised portion of the filter head, this will indicate if a satisfactory seal has been achieved.

    We recommend a Fram PH 966 filter or equivalent with this conversion. We suggest renewal every 3000 miles. However, any filter with a 3/4 UNF thread will be satisfactory.

    Fit the filter in accordance with manufacturers instructions.
    Start the engine and check for leaks. As always after an oil filter change, allow time for the oil to circulate before revving the engine.
    A MOCAL product made in England.

Instructions for a FLEXOLITE spin-on adapter seem to be same as for the MOCAL unit.