DETROIT DIESEL 53
EXHAUST VALVE CLEARANCE ADJUSTMENT
Whenever the cylinder head is overhauled, the exhaust
The correct exhaust valve clearance at normal engine
operating temperature is important for smooth,
valves are reconditioned or replaced, or the valve
efficient operation of the engine.
operating mechanism is replaced or disturbed in any
way, the valve clearance must first be adjusted to the
Insufficient valve clearance can result in loss of
cold setting to allow for normal expansion of the
compression, misfiring cylinders and, eventually,
engine parts during the engine warm-up period. This
burned valve seats and valve seat inserts. Excessive
will ensure a valve setting that is cIose enough to the
valve clearance will result in noisy operation,
specified clearance to prevent damage to the valves
when the engine is started.
especially in the low speed range.
SEC. 14.1 Page 1