Home BMW Repair BMW 3 Series (E30): 1984-90 Manual

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Table m. Valve specifications
Table m. Valve specifications

Engine
page 41
Specification 1984 - 1987 325, 325e, 325es 1988 325 and all 325i 1984 and 1985 318i
Valve head diameter (a)
intake

exhaust
40 mm (1.575 in.)

34 mm(1.339 in.)
42 mm (1.654 in.)

36 mm(1.417 in.)
46 mm (1.811 in.)

38 mm(1.496 in.)
Minimum valve head thickness (b)
intake

exhaust
1.3 mm (0.051 in.)

2.0 mm(0.079 in.)
1.3 mm (0.051 in.)

2.0 mm(0.079 in.)
1.3 mm (0.051 in.)

2.0 mm(0.079 in.)
Valve face angle (c) 45 45 45
Valve stem diameter (d)

standard
oversize 1
oversize 2
7.0 mm (0.275 in.)
7.1 mm (0.279 in.)
7.2 mm (0.283 in.)
7.0 mm (0.275 in.)
7.1 mm (0.279 in.)
7.2 mm (0.283 in.)
8.0 mm (0.315 in.)
8.1 mm (0.319 in.)
8.2 mm (0.323 in.)

Engine
page 41

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