•
Using a cylinder bore gauge, measure
cylinder liner inside diameter at 3 points
(cylinder top ring contacting face, middle,
and oil ring contacting face on BDC) in a
direction at an angle of 45
˚.
Take the
mean value with the largest and smallest
values excepted.
•
The clearance is computed by subtracting
the piston outside diameter from the
cylinder liner inside diameter. Replace
either piston or cylinder liner, whichever
damaged more, if the clearance is
beyond the specified limit.
<Clearance between piston and liner>
3) Piston rings
(1) Visual check
Replace the piston rings with new ones if
detected worn or broken when the engine
is overhauled.
(2) Piston ring gap
•
Insert the piston ring into the upper por-
tion of the cylinder liner bore so that it is
held at a right angle to the cylinder liner
wall.
•
Measure the piston ring gap with a feeler
gauge.
Replace piston rings with new ones if the
gap is beyond the limit.
- 94 -
Standard Limit
111 ~ 111.022 mm 111.122 mm
Standard 0.103 ~ 0.139 mm
Standard Limit
Top ring 0.40 ~ 0.60 mm 1.5 mm
2nd ring 0.40 ~ 0.60 mm 1.5 mm
Oil ring 0.30 ~ 0.50 mm 1.5 mm
To Next Page
Loading...
Need help?
General
