Quote:
Originally Posted by 97 SL320
Measuring is the only way to tell if they are still good. You will need to measure skirt diameter, ring land height, pin diameter.
A piston can have machine marks visible on the skirt but it could of collapsed over time / overheating.
|
When I saw the scuff marks above the compression ring. I thought a reduction in skirt diameter might be a cause. Or bore wear. The other thought was perhaps the compression ring had lost too much temper. Many 603s have had overheating episodes in their past. Measuring provides answers.