
30/ENGINE - WORK ON INDIVIDUAL PARTS
129
19.20
Measuring piston/cylinder mounting clearance
–
Check/measure the cylinder. (
–
Check/measure the piston. (
–
The smallest piston/cylinder mounting clearance equals the smallest cylinder bore diameter minus the largest piston diameter. The
largest piston/cylinder mounting clearance equals the largest cylinder bore diameter minus the smallest piston diameter.
Guideline
Piston/cylinder - mounting clearance
Size I
0.030… 0.052 mm (0.00118… 0.00205 in)
Size II
0.032… 0.054 mm (0.00126… 0.00213 in)
Wear limit
0.070 mm (0.00276 in)
19.21
Checking the piston ring end gap
301218-10
–
Remove the piston ring from the piston.
–
Place the piston ring in the cylinder and align with the piston.
Guideline
Below the upper edge of the cylinder
10 mm (0.39 in)
–
Measure the end gap with feeler gauge
.
Guideline
Piston ring - end gap
Compression ring
≤
0.80 mm (
≤
0.0315 in)
Oil scraper ring
≤
1.00 mm (
≤
0.0394 in)
» If the end gap is greater than the specified measurement:
–
Check/measure the cylinder. (
» If cylinder wear lies within the specified tolerance:
–
Replace the piston ring.
–
Mount the piston ring with the marking facing toward the piston head.
19.22
Changing the camshaft bearing
301219-10
–
Clamp camshaft
into a vise.
Info
Protect the outer cam of the camshaft against damage with an adhesive
tape.
Use soft jaws.
–
Remove screw
.
301220-10
–
Force camshaft gear
off the camshaft.
–
Take off roller bearing
.
–
Degrease the cone of the camshaft and camshaft gear.
–
Oil roller bearing
and slide it on the camshaft.
lubricated with engine oil
–
Mount camshaft gear
.
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