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Edition 08.96
Crank Assembly13
Fig. 2 Inspecting piston ring end clearan-
ce
Special tools, testers and aids required Feeler gauge
- Clean annular groove before inspecting
Piston ring New Wear limit
Dimensions in mm
Fig. 3 Inspecting cylinder bore Special tools, testers and aids required Internal precision measuring instrument 50...100 mm
Inspection procedure
- Measure at 3 points diagonally opposite in transverse direction -A- and in longitudinal direction -B-. Differences compared to nominal size max. 0.10 mm
Note:
The measurement of the cylinder bore must notbe carried out when the cylinder block is
attached to the repair stand with the engineholder MP 1-202 as incorrect measurements
may result.
1st compression ring 0.06 .. 0.09 0.25
2nd compression ring 0.05 .. 0.08 0.25
oil scraper ring 0.03 .. 0.06 0.15
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Edition 08.96
Cylinder Head, Valve Gear15
Removing
- Remove camshaft page 15-16.
- Remove bucket tappets (do not mix up) and place down with running surface facing down.
- Move piston of the relevant cylinder into top dead centre (TDC).
- Insert assembly device MP 1-213 and set
mounting at height of stud bolt.
- Use assembly lever and thrust piece MP 1-211 to remove valve springs.
Note:
The valves are supported on the piston crownwhen carrying out this step.
- Use MP 1-206 to pull off valve stem seals. Installing
- Fit plastic sleeve -A- onto the valve stem in
order to avoid damaging the new valve stem seals.
- Oil valve stem seal -B-, insert into the fitting tool MP 1-306 and carefully push onto the valve guide.
Notes:
Wait about 30 minutes before starting the
engine after installing the camshaft. The
hydraulic compensating elements have tosettle (otherwise valves will strike the piston).
