300CE (124.052) L6-3.2L (104.992) (1993)
Piston Ring: Service and Repair
NOTE: Numbers in parentheses ( ) indicate a component or tool in the associated illustration.
Replacement
1. Remove pistons.
2. Gap and measure end clearance of piston rings.
3. Remove piston rings with pliers (10).
4. Measure width of ring of piston rings.
5. Only install piston rings with identical ring width.
6. Install ring with "Top" facing up.
NOTE: When replacing the piston rings, determine which pistons are installed. When performing repairs, fit pistons only with the matching
piston rings.
7. Install hook spring (8) in oil scraper ring (3). Install offset 180° to joint (arrow).
Test Specifications
End Clearance Of Piston Rings:
Groove 1: 0.015 - 0.050 mm
Groove 2: 0.020 - 0.040 mm
Groove 3: 0.010 - 0.045 mm
Gap Clearance Of Piston Rings:
Groove 1: 0.20 - 0.40 mm
Groove 2: 0.20 - 0.40 mm
Groove 3: 0.20 - 0.45 mm