The exploded views of a J series engine opposite are given only as a guide to the general placement of all parts on an early MG o.h.c. engine. Individual MMM MG engines differ and reference should be made to the manual appropriate to the car in question to ascertain individual part identification.
Most engine parts are available for every O.H.C. MG Model, either in new or secondhand form.
REMEMBER – All parts illustrated are J Series components.
STATE CLEARLY MODEL TYPE WHEN ORDERING
| Code | Description | Excluding VAT | Unit of Sale | Illustration Number |
|---|---|---|---|---|
| MG0423A | M6/ St/St cylinder block water jacket plate | £42.00 | Per pair | 2 |
| MG0425A | M6/ Cylinder block (bare) | £1800.00 | Each | 1 |
| MG0425B | M5/ Front of block to dynamo gasket | £7.95 | Each | |
| MG0425C | M5/ Rear of block to flywheel assy gasket | £7.95 | Each | |
| MG0425Z | 2nd hand Cylinder block (bare) | £250.00 | Each | 1 |
| MG0426A | M6/ Cylinder block water inlet pipe | Each | 4 | |
| MG0427A | M5/ Cylinder block drain cock | £20.83 | Each | 5 |
| MG0428A | M5/ Rear main bearing sleeve | £355.00 | Each | 6 |
| MG0428B | M5/ Modified rear main bearing sleeve | £425.00 | Each | 6a |
| MG0428Z | M5/ Rear main (flywheel) housing | Each | 6 | |
| MG0429Z | M5/ Starter pinion inspection plug | Each | 7 | |
| MG0430A | M1/M2/M3/ Starter motor 12V Lucas M35 - Outright | £365.00 | Each | 8 |
| MG0430B | M1/M2/M3/ Starter motor 12V Lucas M35 - Service exchange | £265.00 | Each | 8 |
| MG0430C | M1/M2/M3/ Starter motor dust cover | Each | ||
| MG0430D | M1/M2/M3/ Starter motor 6V Lucas M35 - Outright | £365.00 | Each | 8 |
| MG0430E | M1/M2/M3/ Starter motor 6V Lucas M35 - Service exchange | £265.00 | Each | 8 |
| MG0431Z | M5/ Starter motor spacing ring | Each | 9 | |
| MG0432Z | M5/ Front main bearing housing | £265.00 | Each | 10 |
| MG0433A | M5/ Shim for MG0433 | Each | 11a | |
| MG0433B | Viton seal (to replace MG0465) | £7.20 | Each | |
| MG0433Z | M5/ Front engine cover plate | £120.00 | Each | 11 |
| MG0434A | M1/M2/M3/ Dynamo 6V -Fully restored -no exchange unit | £445.00 | Each | 12 |
| MG0434B | M1/M2/M3/ Dynamo 12V -Fully restored no exchange | £595.00 | Each | 12 |
| MG0434Z | M1/M2/M3/ Dynamo 12V -Fully restored service exchange | £425.00 | Each | 12 |
| MG0435A | M5/ Dynamo universal drive fork - shallow | Each | 13 | |
| MG0435B | M5/ Dynamo universal drive fork - deep | Each | 13 | |
| MG0436A | M5/ Woodruff key for MG0435/MG0435A | Each | 14 | |
| MG0437A | M1/M2/NT/ Bolt for flexible drive coupling | £33.60 | Each | 15 |
| MG0437B | M1/M2/NT/ Aerotight nut for MG0437 | £0.75 | Each | 15 |
| MG0438A | M5/ Dynamo base shims (.003, .005, .007, .015) | £22.50 | Each | 16 |
| MG0439Z | M5/ Dynamo bottom bevel wheel | £65.00 | Each | 17 |
| MG0440Z | M5/ Bottom bevel wheel securing bolt | Each | 18 | |
| MG0441Z | M5/ Tab washer for MG0440 | Each | 19 | |
| MG0442A | M5/ Your distributor fully reconditioned | Each | 20 | |
| MG0442Z | M5/ Distributor - complete | Each | 20 | |
| MG0443A | M5/ Distributor cap | Each | 21 | |
| MG0443B | M5/ Distributor lead set (cloth type - caps NOT inc) | Each | ||
| MG0444A | M5/ Rotor arm | £7.50 | Each | 22 |
| MG0444B | M3/L/ Rotor arm - 'Butterfly style' | £35.00 | Each | 22 |
| MG0444C | M3/L/ Rotor arm - 'DJ distributor' | £22.50 | Each | 22 |
| MG0445A | M5/ Condenser | £9.0 | Each | 23 |
| MG0445B | M5/ Condenser clip | £9.00 | Each | |
| MG0446A | M1/M2/M3/TA Lucas type contact point set | £11.85 | Each | 24 |
| MG0446B | M/ Early M type contact point set | £35.00 | Each | 24 |
| MG0446C | M1/M2/M3/TA Lucas type contact point set | Each | 24 | |
| MG0446D | M1/M2/M3/TA Lucas type contact point set | Each | 24 | |
| MG0447Z | M5/ Distributor to housing locking plate | Each | 25 | |
| MG0448Z | M5/ Distributor drive dog | Each | 26 | |
| MG0449A | M5/ Oil pump to body gasket | £0.95 | Each | |
| MG0449B | M5/ Oil pump lid to oil pump gasket | £0.95 | Each | |
| MG0449C | M5/ Oil pump lid | £15.00 | Each | |
| MG0449Z | M5/ Oil pump - complete | £45.00 | Each | 27 |
| MG0450A | M5/ Oil pump pressure relief spring | Each | 27a | |
| MG0451A | M5/ Oil pump driven gear | Each | 28 | |
| MG0452A | M5/ Oil pump gear set | £95.00 | Each | 29 |
| MG0453A | D/J/F/ Oil pump gear set (new) | Each | 29 | |
| MG0454A | M/OHC/ 2nd hand Flywheel (no internal step) | £45.00 | Each | 30 |
| MG0454Z | D/F/J/M/OHC/ Flywheel (with internal step) | £165.00 | Each | 30 |
| MG0455A | M5/ Flywheel ring gear- 83teeth (new for MG0454) | £150.00 | Each | 30a |
| MG0455Z | T Flywheel ring gear- 120teeth (used) | £50.00 | Each | 30a |
| MG0456Z | M5/ Original crankshaft type | £125.00 | Each | 31 |
| MG0457A | M5/ Crankshaft to flange key | Each | 31a | |
| MG0458A | M5/ Original crankshaft flange | Each | 32 | |
| MG0458B | J2/F2/ Original crankshaft flange | £35.00 | Each | 32 |
| MG0459A | M5/ Crankshaft flange retaining nut | Each | 33 | |
| MG0460Z | M5/ Main bearing retaining plate tab washer | Per p | 34 | |
| MG0461Z | M5/ Main bearing retaining plate | Each | 35 | |
| MG0462A | M5/ Main bearing (single ball type) | £225.00 | Each | 36 |
| MG0462B | M5/ Main bearing (single ball, bronze cage, split race) | Each | 36 | |
| MG0463Z | M5/ Dynamo bevel drive gear | £63.00 | Each | 37 |
| MG0464Z | M5/ Oil pump & distributor spiral drive gear | £65.00 | Each | 38 |
| MG0465A | M5/ Crankshaft front oil thrower | Each | 39 | |
| MG0465B | M6/ Keyed c/shaft oil thrower (when 2ndry bearing fitted) | Each | 39a | |
| MG0466A | M5/ Crankshaft thrust washer | Set of 3 | 40 | |
| MG0467A | M6/ Secondary crankshaft support bearing | Each | 41 | |
| MG0468A | M5/ Starting handle dog | Each | 42 | |
| MG0468B | M6/ Short starter dog (when 2ndry bearing fitted) | Each | 42a | |
| MG0469Z | M5/ Secondary bearing front cover plate | £35.00 | Each | 43 |
| MG0470A | F/ Original pattern con rod (1 1/2" journals) Alloy | Each | 44 | |
| MG0470Z | M6/ Original pattern con rod (1 1/2" journals) | Each | 44 | |
| MG0471A | M6/ Big end bolt for MG0470 | £7.00 | Each | 45 |
| MG0471B | F/ Big end nut for MG0470A | £2.00 | Each | 45a |
| MG0472A | M5/ Piston, 57mm, 3 ring, grooved gudgeon pin | £500.00 | Set of 4 | 46 |
| MG0472B | Cosworth racing piston 58mm | £900.00 | Set of 4 | 46 |
| MG0472C | TA +30 Piston set NOS | £160.00 | Set of 4 | 46 |
| MG0473A | M6/ Crankshaft, EN408 c/w rear journals flange & tip seal | Each | 47 | |
| MG0474A | M6/ Fully floating con rod for high performance | £1196.00 | Set of 4 | 48 |
| MG0474B | Bearing shells -.030 | £45.00 | Set of 8 | |
| MG0474Z | 2nd hand Con rod | £15.00 | Each | 48 |
| MG0475A | M5/ Piston, 57mm, 3 ring, fully floating gudgeon pins | Each | 49 | |
| MG0476A | M6/ Sump. Fully machined and finned alloy | Each | 50 | |
| MG0476B | M6/ Sump drain plug | Each | 50b | |
| MG0476C | N/D/J/ Sump gasket | £8.95 | ||
| MG0477Z | F/ Sump. Fully machined and finned alloy | Each | 50a | |
| MG0478Z | M5/ Sump filter & union | Each | 51 | |
| MG0527A | M5/ Sump to pump oil pipe | Each | 52 | |
| MG0527B | M/J/D/ Oil drain pipe (vert. drive gallery to front housing) | Each | 52 | |
| MG0715A | M6/ Water jacket side plate gasket | £3.95 | Each | 3 |