Valve gear

/ 9-3 (9400) / 1998 / 2. Engine / Basic engine, 4-cylinder petrol / Technical data / Valve gear

Valve gear

1.

Exhaust valve

2.

Inlet valve

Important
The exhaust valves are faced with stellite and should not, therefore, be machined. Only grinding-in with paste is advised.

Valve guides

Length	mm	42.5
Outside diameter	mm	12.039 - 12.050
Bore for valve guides, diameter	mm	12.000 - 12.018
Maximum clearance, valve guide	mm	0.50 (Measured across the valve disc with the valve drawn out 3 mm from the valve seat.)

Valve springs

Length
Fitted	mm	37.0
Free	mm	44.0 - 47.0
When loaded 620 - 670 N (138 - 150 lbf)	mm	28.4

Tappets

Diameter	mm	32.959 - 32.975
Height	mm	24.0
Bore for tappets, diameter	mm	33.000 - 33.016