The exploded view 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 except Nos. 4A & 7.
STATE CLEARLY MODEL TYPE WHEN ORDERING
| Code | Description | Excluding VAT | Unit of Sale | Illustration Number |
|---|---|---|---|---|
| MG0479A | M5/ Cylinder head stud | £69.50 | Set | 2 |
| MG0479B | M5/ Cylinder head stud nut | £1.80 | Each | 3 |
| MG0480A | M5/ Origig pattern adj rocker, EN398B hardened & ground | £372.00 | Set of 8 | 4 |
| MG0480B | M5/ Non adj rocker | Set | 4a | |
| MG0481A | J/ Rocker bush, eccentric, circlip type, inc circlip | £71.60 | Set of 8 | 5 |
| MG0482A | J/ Rocker bush circlip | Set | 6 | |
| MG0483Z | M/D/F/ Rocker bush, eccentric, with locM3ut | Set | 7 | |
| MG0484A | M/D/ Rocker shaft | £36.00 | Per pair | 8 |
| MG0484B | J/Rocker shaft | £36.00 | Per pair | 8 |
| MG0484C | P/ Rocker shaft | £39.00 | Per pair | 8 |
| MG0484D | L/K/ Rocker shaft | £42.00 | Per pair | 8 |
| MG0484E | N/ Rocker shaft | £42.00 | Per pair | 8 |
| MG0484F | F/ Rocker shaft | £42.00 | Per pair | 8 |
| MG0485A | J/P/L/N/K/ Rocker shaft locking bolt without spigot | £3.50 | Set | 9 |
| MG0485Z | M/D/P/M2/M3/ Rocker shaft locking bolt with spigot | £3.50 | Set | 9 |
| MG0486A | M/D/ Rocker shaft spacer set | £14.42 | Set | 10 |
| MG0486B | J/ Rocker shaft spacer set | £27.30 | Set | 10 |
| MG0486C | PA/PB/ Rocker shaft spacer set | £27.30 | Set | 10 |
| MG0486D | L/N/K/ Rocker shaft spacer set | £38.63 | Set | 10 |
| MG0486E | FT/ Rocker shaft spacer set | £25.21 | Set | 10 |
| MG0487A | All/ Rocker shaftbelleville thrust washer | £4.40 | Set | 11 |
| MG0488A | J/ Rocker shaft central support | Per pair | 12 | |
| MG0489A | J/ Rocker shaft rear support casting | Each | 13 | |
| MG0490A | M/D/ Camshaft, hardened & ground | £305.00 | Each | 14 |
| MG0490B | M/D/ Race camshaft, hardened & ground | £315.00 | Each | 14 |
| MG0490C | J/ Camshaft, hardened & ground | £305.00 | Each | 14 |
| MG0490D | F/ Camshaft, hardened & ground | £375.00 | Each | 14 |
| MG0490E | F/ Race camshaft, hardened & ground (improved timing) | £395.00 | Each | 14 |
| MG0490F | P/ Camshaft, hardened & ground | £350.00 | Each | 14 |
| MG0490G | P/ Race camshaft, hardened & ground (improved timing) | £335.00 | Each | 14 |
| MG0490H | N/ Camshaft, hardened & ground | £495.00 | Each | 14 |
| MG0490J | N/ Race camshaft, hardened & ground (improved timing) | £515.00 | Each | 14 |
| MG0490K | L/ Camshaft, hardened & ground | £507.00 | Each | 14 |
| MG0490L | L/ Race camshaft, hardened & ground (improved timing) | £515 | Each | 14 |
| MG0491A | M6/ Camshaft bearing set (standard bore) | £69.50 | Set | 15 |
| MG0491B | F/ Camshaft bearing set (standard bore) | £79.50 | Set | 15 |
| MG0492A | M/D/J/F/ Camshaft thrust washer | £8.09 | Each | 16 |
| MG0492B | D/J/F/ Camshaft Belleville washer | £0.55 | Each | 16 |
| MG0493B | M5/ Rev counter drive cable union (LH thread) | Each | 17 | |
| MG0494A | M5/ Front camshaft stand c/w cap | £205.00 | Each | 18 |
| MG0494Z | M5/ Front camshaft cap | £35.00 | Each | 18 |
| MG0495A | M5/ Intermediate camshaft stand c/w cap | £155.00 | Each | 19 |
| MG0495Z | M5/ Intermediate camshaft stand c/w cap | £55.00 | Each | 19 |
| MG0496A | M5/ New camshaft driven gear (straight cut gears) | Each | 20 | |
| MG0496Z | M5/ Camshaft driven gear | £35.00 | Each | 20 |
| MG0497A | M5/ New vertical drive pinion gear (straight cut gear) | Each | 21 | |
| MG0497Z | M5/ Vertical drive pinion gear (parallel end) | £45.00 | Each | 21 |
| MG0498A | M5/ New matched pair of vertical drive gears | £218.00 | Per pair | 22 |
| MG0499A | M5/ Vertical drive pinnion thrust washer | £9.50 | Each | 23 |
| MG0500A | J/ New cylinder head. Fully machined less seats | £1950.00 | Each | 1 |
| MG0500B | M/D/ CylInder head. Bare | Each | 1 | |
| MG0500C | J/ CylInder head. Bare | Each | 1 | |
| MG0500D | F/ CylInder head. Bare | Each | 1 | |
| MG0500Z | M/OHC CylInder head. Bare | £300.00 | Each | 1 |
| MG0501A | All/ Torrington vertical drive bearings | £68.00 | Per pair | 24 |
| MG0502A | M5/ Uprated vertical drive oil drain gallery | £125.00 | Each | 25 |
| MG0502B | M5/ Orig pattern vertical drive oil drain gallery | £125.00 | Each | 25 |
| MG0502C | M5/ Orig pattern vertical drive oil drain gallery | £125.00 | Each | 25 |
| MG0503A | Vertical drive gallery shims (0.005) | £4.95 | Each | 26 |
| MG0503B | Vertical drive gallery shims (0.010) | £4.95 | Each | 26 |
| MG0504A | D/F/ Vertical drive oil seal conversion housing | £26.67 | Each | 27 |
| MG0505A | D/F/ Upper neoprene lip seal for vertical drive housing | £2.50 | Each | 28 |
| MG0505B | D/F/ Lower neoprene lip seal for vertical drive housing | £2.50 | Each | 28 |
| MG0506A | D/F/ Steel forged vertical drive fork - deep (parallel bore) | £42.00 | Each | 29 |
| MG0506B | D/F/ Steel forged vertical drive fork - shallow (parallel) | £42.00 | Each | 29 |
| MG0507A | D/F/ Woodruff key for vertical drive fork | £1.00 | Each | 30 |
| MG0508A | D/F/ Vertical drive flexible coupling | £23.75 | Each | 31 |
| MG0509A | M/D/F/ Inlet valve, alloy steel | £16.75 | Each | 33 |
| MG0509B | M/D/F/ Exhaust valve, alloy steel | £16.75 | Each | 33 |
| MG0510A | J/ Inlet valve, alloy steel | £18.00 | Each | 33a |
| MG0511A | J/ Exhaust valve, alloy steel | £18.00 | Each | 34 |
| MG0512A | M6/ Valve hat for use with reprofiled camshaft | Set of 8 | 35 | |
| MG0512B | F/ Valve hat for use with reprofiled camshaft | Set of 12 | 35 | |
| MG0513A | M1/M2/M3/ Valve guide 2 1/2" - exhaust - bronze | £8.75 | Each | 36 |
| MG0513B | M1/M2/M3/ Valve guide 2 1/4" - inlet - bronze | £8.75 | Each | 36 |
| MG0513C | F/ Valve guide 2 1/4" - bronze | £8.75 | Each | 36 |
| MG0513D | F/ Valve guide 2 1/2" - steel | Set of 12 | 36 | |
| MG0514A | M/D/F/ Valve springs - singles | £15.00 | set of 4 | 37 |
| MG0515A | M/D/F/J/ Valve springs - doubles (per 4) | £24.00 | set of 4 | 38 |
| MG0515B | J/P/L/N/K/ Race quality Valve springs - doubles | £22.00 | set of 4 | 38 |
| MG0516A | M1/M2/M3/ Valve cotters - per 8/2 | £33.00 | set of 4 | 39 |
| MG0517A | J/F/L/K/ Valve cap (cotter retainer) | £4.50 | Each | 40 |
| MG0517B | P/N/ Valve cap (cotter retainer) | £4.50 | Each | 40 |
| MG0518A | M5/P/L/M3/ Cylinder head oil metering pin | £13.95 | Each | 41 |
| MG0519A | M/J/D/ Cylinder head core plugs | Set of 3 | 42 | |
| MG0519B | F/ Cylinder head core plugs | Set of 4 | 42 | |
| MG0520A | M/J/D/ Alloy rocker cover | £160.00 | Each | 43 |
| MG0521Z | F/ Alloy rocker cover | Each | 43a | |
| MG0522A | M/J/D/ Rocker cover to cylinder head securing brkts | £20.00 | Each | 44 |
| MG0522B | F/ Rocker cover to cylinder head securing brkts | Each | 44 | |
| MG0523A | M/J/D/F/ Rocker cover securing knob - knurled | £11.00 | Each | 45 |
| MG0524A | M/J/D/ Brass union for rev counter cable connection | £13.75 | Each | 46 |
| MG0525Z | M/J/D/ Oil feed pipe (Block front housing to metering pin) | Each | 47 | |
| MG0526Z | M/J/D/ Oil drain pipe (cylinder head to base of block) | Each | 48 | |
| MG0527A | M5/ Sump to pump oil pipe | Each | 49 | |
| MG0527B | M/J/D/ Oil drain pipe (vert. drive gallery to front housing) | Each | ||
| MG0528A | M/D/ Sparking plug (18mm Champion 7) | Set of 4 | 50 | |
| MG0528C | J/ Sparking plug (14mm NGK B6HS) | £4.50 | Set of 4 | 50 |
| MG0528X | F/ Sparking plug (18mm Champion 7) | Set of 6 | 50 |