Valve Springs; Rocker Arms And Rocker Shaft; Cylinder Block - Mitsubishi MT160 Repair Manual

ENGINE
Valves
(I) Visually inspect the seating face and stem
of each valve for wear and damage, and
repair or replace the valve, as necessary.
(2) A valve whose head is worn down to the
limit of "T" value must be replaced.
(3) Inspect the valve for localized wear at three
places in particular, which are indicated in
the illustration, and repair or replace the
valve, as necessary. Make sure tha t the top
end face and other surfaces of the stem as
shown by arrows are smooth and that
there are no dents nor groovy depressions
on the stem.
I nspect here.
Check here.
Valve wear
Valve springs
(I) Cracked, worn or otherwise damaged springs
must be replaced.
(2) A weakened valve spring, the weakness
being evidenced by its reduced free length
or spring rate, must be replaced.
(3) Check each spring for squareness. Never
re-use distorted valve springs.
Rocker arms and rocker shaft
(1) Take diameter measurement on rocker arms
and rocker shaft to determine the clearance
between the two. Replace the arms if the
clearance exceeds the service limit.
2-18
(2) A rocker arm whose end face for pushing
down the valve stem is badly worn must be
replaced. The same consideration is required
for the adjusting screw, whose end face
comes into contact with the top of the
pushrod: if this face is found badly worn,
replace the adjusting screw.
Cylinder block
(I) Visually inspect the cylinder block before
and after washing it clean. If any crack or
serious damage is noted, replace the cylin-
der block.
(2) Check the camshaft front journal bushing
for wear. If the bushing is worn beyond the
service limit or damaged beyond repair,
remove it by using the special tool (installer)
and replace it with new one.
Front face of
cylinder block
Removing camshaft bushing