BMW 3 Series E30

since 1983-1994 release

GENERAL INFORMATION

All sizes and gaps are specified in mm.

Working volume of engines:
– 316i (1988-91)	1596 ^cm3(M40 engine, 4-cylinder)
– 316 (1983-88) and 318i (1983-87)	1766 ^cm3(M10 engine, 4-cylinder)
– 318i (1987-91)	1796 ^cm3(M40 engine, 4-cylinder)
– 320i (1987-91)	1990 ^cm3(M20 engine, 6-cylinder)
– 323i (all)	1990 or 2316 ^cm3(M20 or M60 engine, 6-cylinder)
– 325i (1987-91)	2494 ^cm3 (M20 engine, 4-cylinder)
Numbering of cylinders:
– Operating procedure	1–3–4–2
– 4-cylinder	1–3–4–2
– 6-cylinder	1–5–3–6–2–4
Lubrication system:
– Oil pressure:
• idling	0,5–2,0 ^kgfs/cm2
• at 4000 rpm	it is not lower than 4,0 ^kgfs/cm2
– Gaps of the oil pump (M40):
• between the conducted rotor and a pump housing and in gearing of rotors	0,12–0,20
• Length of a spring of the reducing valve (M40)	84,1

The inhaling moments (in N. of m)

Cap of a natyazhitel of a chain	35
Bolts of a natyazhitel of a chain	22
Cam-shaft asterisk bolt:
– M10 engines	10
– M20 and M40 engines	65
Bolts of fastening of a cover of a chain to the engine:
– M6 bolt	10
– M8 bolt	22
– M10 bolt	47
Crankshaft pulley bolt	22
Bolt or nut of a nave of the crankshaft:
– M10 engine	190
– M20 engine	410
– M40 engine	310
Bolts of a head of the block of cylinders (at assembly it is recommended to change):
– M10 engine, 4-cylinder
• 1st stage of an inhaling	60
• the 2nd stage (to wait for 15 min.)	to tighten on 33 °
• the 3rd stage (after warming up of the engine)	to tighten on 25 °
– The M20 engine, 6-cylinder, bolts with 6-faced heads
• 1st stage of an inhaling	30
• 2nd stage	to tighten on 90 °
• 3rd stage	to tighten on 90 °
– M40 engine, 4-cylinder
• 1st stage of an inhaling	30
• 2nd stage	to tighten on 90 °
• 3rd stage	to tighten on 90 °
Bolts of the soaking-up collector:
– M8 bolt	22
– M7 bolt	15
– M6 bolt	10
Nuts of a final collector:
– M7 nut	15
– M6 nut	10
Bolts of fastening of a flywheel (drive plate of the hydrotransformer)	105 (120)
Bolt of fastening of an asterisk of an intermediate shaft	60
Bolts of fastening of the oil pallet (except M40)	22
Bolt of fastening of an asterisk of the oil pump (M10)	10
Bolts of fastening of a cover of the oil pump (M40)	9
Bolts of fastening of a forward cover to the block of cylinders (M20 and M40):
– M6 bolt	10
– M8 bolt	22
Bolts of fastening of the holder of a back epiploon:
– M6 bolt	9
– M8 bolt	22