MPJG Engine Bolts, Studs and Pipe Fittings

Measurements taken from MPJG engine number 1025

Front mounting plate to block Nine used M8x1, length 20mm. Bolt. 4mm unthreaded. Head size 5/16 BSF.
Flywheel casing to block Eleven used M8x1, length 20mm. Bolt 6mm unthreaded. Head thickness reduced to 4mm. Head size 5/16 BSF.
Block to flywheel casing Two used M8x1, length 46mm. Bolt 28mm unthreaded. Head size 5/16 BSF.
Clutch cover to flywheel Six used M8x1, length 22mm. Bolt 5mm unthreaded. Head size 1/4. BSF.
Clutch housing (bell housing) to flywheel housing Eight used M10x1.5, length 28mm. Bolt 10mm unthreaded. Head size 3/8 BSF.
Sump oil pick up pipe to block Two used M6x . length 38mm. Bolt 28mm unthreaded
Sump to block Twelve used:

Ten
M8x1, length 26.5mm. Bolt 12mm. unthreaded. Head size 5/16 BSF.

Two
M8x1, length 30mm Bolt 12mm. unthreaded Head depth 8mm, Head size 5/16 BSF with screwdriver slot.



Block to sump Four used M8x1, length 26.5mm. Bolt 12mm.unthreaded. Head size 5/16 BSF.
Flywheel to crankshaft

Tappet Guides to block Four used M10x1.5, length 45mm. Bolt 24mm unthreaded. Head thickness 8.5mm. Head size 3/8BSF.
Oil gallery plugs Three used M8x1, length 8.5mm. Setscrew. Head size 1/4BSF.
Camshaft bearing locking screw Two used M8x1, length 16mm. Setscrew. Head size 1/4BSF Spigot at end 4mm long.
Dynamo bracket to block upper One used M8x1, length 15mm. Bolt, 4mm unthreaded. Head size 5/16 BSF.
Dynamo bracket to block lower. One used M8x1, length 12Mm. Bolt, 4mm unthreaded. Head size 5/16 BSF.
Dynamo front to engine front plate . One used M 8x1, length 25mm. Bolt, 12 mm unthreaded. Head size 5/16 BSF.
Dynamo rear to bracket One used M8x1, length 28mm. Bolt, 15mm unthreaded. Head size 5/16 BSF.
Dynamo position arm to block One used M10x1.5, length 38mm. Bolt, 18mm unthreaded Head size 3/8 BSF. (Note spacer 20mm)
Dynamo position arm to dynamo One used
1/4 BSW, length 16mm. Setscrew. Head size 3/8 BSF.
Starter motor to flywheel casing Two used M10x1.5, length 33mm. Bolt. 10mm unthreaded. Head size 3/8BSF.
Starter motor to flywheel casing One used M10x1.5, length 28mm. Bolt. 10mm unthreaded. Head size 3/8BSF.
Cam gear retaining bolt One used M12x1.5, length 19mm. Bolt 3mm unthreaded Head size 7/16 BSF.
Timing Chain Cover, eleven used:

   cover to front mounting plate Five used M8x1, length 13mm. Bolt 5mm unthreaded. Head size 5/16 BSF.
   cover through front mounting plate Three used M8x1, length 15mm. Bolt 5mm unthreaded. Head size 5/16 BSF. (Nuts used)
  cover through to block Three used M8x1, length 20mm. Bolt 5mm unthreaded. Head size 5/16 BSF.
Bell housing to Gearbox Eight used M8x1, length 28mm. Bolt 10mm unthreaded. Head size 5/16 BSF.
Oil pumpto block Eight used M6 x 1. All have 20mm of thread and 3/16WW (1/4 BSF ) heads.


Two of 76mm overall length.Two of 72mm overall length. Four of 59mm overall length.
Oil filter bracket to block Two used M6x1, length 55mm. Bolt 40mm unthreaded. Head size 5/16 BSF
Oil pipe to oil pump Two used M6x1, length 18mm. Bolt 6mm unthreaded. Head size 1/4 BSF
Rocker pedestal to head. Eight used M8x1, length 73mm 60mm unthreaded. Head size 5/16 BSF
Breather pipe securing clamp One used M8x1. length 38mm, 25mm unthreaded. Head size 5/16 BSF.
Water bypass union to thermostat housing Two used 2BA. length 14mm.Cheese Head.
Fan to water pump pulley bolts Four used M5x0.75, length 38mm, 24mm unthreaded. Head size 3/16 BSF.



Stud tappet cover Two used M8x1, length 68mm, thread block end15mm, outer thread 26mm.
Stud cylinder head Four used M10x1.5, length 110mm, thread block end 20mm, thread nut end 26mm.
Stud cylinder head Seven used M10x1.5, length 122mm, thread block end 20mm, thread nut end 26mm.
Stud rocker cover to block Two used M8x1, length 118mm, thread head end 13mm, thread cover end 26mm.
Stud head to water pump One used M8x1, length 66mm, thread head end 15mm, thread nut end 13mm.
Stud head to water pump Three used M8x1, length 38mm, thread head end 15mm, thread nut end 13mm.
Stud head to water manifold Two used M8x1, length 50mm, thread head end 15mm, thread nut end 13mm.
Stud head to water manifold Two used M8x1, length 32mm, thread head end 15mm, thread nut end 13mm.
Stud waterpump to thermostat housing Two used . M8x1, length 28mm, thread thermostat end 13mm, thread water pump end 14mm.
Stud exhaust manifold to head Eight used M8x1, length 42 mm, thread head end 15mm thread nut end 17mm.
Stud inlet manifold to carb Four used M10x1.5, length 36mm, thread each end 13mm.
Fittings 1/8 BSP
  Block water tap: Oil feed block to head, both ends: Oil pressure feed pipe, block end.

Please send any errors or omissions, to robbut[at]onetel.com

Robert F.Butson December 2008