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alphie alphie is offline
Registered User
Join Date: May 2005
Location: Cambridge, Ontario (Ayr)
Posts: 288
Rings size for 98mm Mahle

I recently aquired a used set of mahle 98mm P&C.

In measuring the ring grooves I seem to get an odd measurement. I've spoken with Peter Sanchez at Andial and I have a call in to EBS.

Here's what I'm measuring:

top compression groove: 1.21-1.22 mm (good for 1.2mm ring)

bottom compression groove: 1.20 mm

oil groove: 2.9mm

I can't see how a 3mm oil ring will work in a 2.9mm groove. Also the bottom compression groove would be tight for 1.20 rings. I've taken many measurements across all the pistons and I get basically the same results.

Do these measurements seem normal? Peter suggested that the pistons could have been damaged from running lean.

'79 SC
Old 09-06-2005, 01:22 PM
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