Valve Clearance - Volvo Penta D7A T Operator's Manual

Maintenance: Engine
42
Changing
1. Remove the belt for the fuel pump.
2. Loosen screw (5) and push the alternator belt
pulley (4) to the left and remove the belt.
3. Replace it with a new one.
4. Push the alternator belt pulley (4) to the right until
the correct belt tension is achieved, tighten the
screw (5).
5. Replace the belt for the fuel pump and adjust it.

Valve clearance

NOTE! Before adjusting valve clearance, allow the
engine to cool for at least 30 min. The oil temperature
should not exceed 80°C (176°F).
Checking
1. Remove crankcase ventilation oil-trap housing(A).
A
2. Remove the cylinder head cover.
3. Position crankshaft as in the figure at the bottom
of this page.
4. Check valve clearance (1) between rocker arm /
tappet contact face (2) and valve steam (3) with a
feeler gauge (6) (there should only be slight
resistance when blade is inserted). For data on
valve clearance, see "Technical data".
Adjusting
1. Release locknut (4).
2. Turn the adjustment screw (5) to obtain correct
valve clearance.
3. Tighten lock nut (4).
4. Reinstall cylinder head with a new gasket if
necessary.
5. Refit crankcase ventilation oil-trap housing.