DV11
Operation and Maintenance
176
Commissioning and Operation
Printed in Mar. 2005 PS-MMA0608-E1A
Rocker arm
Caliper adjusting bolt
Caliper
Intake valve
spring
Intake valve
Valve seat
Valve adjusting bolt
Valve adjusting nut
Push rod
Valve adjusting
bolt
Rocker arm
Push rod
Caliper adjusting nut
Caliper
Exhaust valve spring
Exhaust valve
Valve seat
C
B
Intake valve adjusting
Exhaust valve, engine brake adjusting
Engine brake
Engine brake Adjusting bolt
4.8. Adjustment of valve clearance
4.8.1. General information
The valve clearances are to be adjusted at the times of the following situations.
z When the engine is overhauled and the cylinder heads are disassembled.
z When severe noise comes from valve train.
z When the engine is not normally operated, even though there is no trouble in the
fuel system.
4.8.2. Valve clearance adjust procedure
z After letting the #1 cylinder's piston come at the compression top dead center by
turning the crankshaft, adjust the valve clearances.
z Loosen the lock nuts of rocker arm adjusting screws and push the feeler gauge
of specified value between a rocker arm and a valve stem and adjust the
clearance with adjusting screw respectively and then tighten with the lock nut.
z As for the valve clearance, adjust it when in cold, as follows.
Engine model Intake valve (A) Exhaust valve (B) Engine brake (C)
DV11
0.4 mm 0.5 mm 1.5 mm
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