Thread: Engine jewelry
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DonE DonE is offline
Wo ist die Rennstrecke?
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Join Date: Mar 2004
Location: Brooks, GA
Posts: 1,211
Originally Posted by JFairman View Post
Did the cylinders come to you with the pistons installed?
If you don't take the pistons out you have no idea where the ring gaps are and you'll never get oil into the compression ring lands from the top or botttom.

I have a set of brand new Mahle 3.3 pistons and cylinders from a sealed box and I removed a piston from one of the cylinders just to see it and look at the amazingly perfect machine work on a new 930 mahle piston.
The factory installed ring gaps were all lined up in a row, just how you don't want them.. and skwirting oil on the top or bottom with the piston installed in the cylinder will not wet the compression ring lands with oil.
Mike at JB offered to install the pistons for me because he has experience with the Total Seal rings, so he set the gaps and measured the ring groove side-to-side clearance too. They also sent my wrist pins out for a lubrication coating and machined the wrist pin bosses in the pistons for a good float fit. Classy operation.
Old 04-08-2010, 07:28 PM
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