I got a chance to weigh the piston/wrist pin assemblies on our digital postal scales here at work, they are accurate to .1 oz. The wrist pins are rather tight to the pistons at the moment so I decided to weigh them with the piston since they will move with the piston anyway. The KS piston I thought should be heaviest because of the "+" on top actually turned out to be the lightest by a large amount. Here are the weights converted to grams - Mahle pistons marked with 93 97 - : 677.55 (1# 7.9 oz) 680.39 (1# 8.0 oz) 686.05 (1# 8.2 oz) KS piston marked with 93 98 + : 660.55 (1# 7.3 oz) Just goes to show that what you see isn't always what you've got. I've really wondered if someone worked the top of that piston a little, it looks very different under the scope than the others from a surface finish perspective. The other engine has 2 cylinders removed due to the head problems, maybe one of those pistons is a match for the other Mahles. Hopefully I'll get a chance to look some evening this week. Joe |
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