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B20 piston rings 120-130

posted by  someone claiming to be Stefan on  Sun Dec 26 03:25 CST 2004 [RELATED]

Hello,

Yep, you always have to measure how thick the rings are.
It depends if you have Mahle or KS pistons in your engine, Volvo used them both. Always measure the bores of the engine before deciding to put in new rings. If the bores are not straight (mostly tapered), or there is an edge at the top of the bore the rings WILL break ! If the bores are not round anymore you will make things worse with just new rings. If the bores dimensions are still acceptable, hone them PROPERLY, 35°-45° angle and always use lubricant while honing. Otherwise the new rings will never run in.
To assure a reasonably short break in period use cast iron rings, not the hardchromed ones.

Best regards

Stefan






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