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GM 6.2 Diesel question.?
Ok, I know some of you out there know these engines, and I know this question will make me look dumb, but hey, so be it.
I'm tearing down this 6.2, pretty sure it's out of a 91. Anyway, on the block, where the oil pan gasket would sit, there are letters stamped at each cylinder. 7 of them are "C", one is "D". Does anyone know what this means?
Thanks in advance for your help.
3 Answers
- Kenny DLv 61 decade agoFavorite Answer
Because of very close cylinder bore tolerances, select fit pistons was used in the original assembly of the engine and the select fit pistons (stamped with an A, B, C, or D) had to coincide with the A, B, C, or D stamped at the base of each cylinder bore.
- doornobkLv 71 decade ago
Kenny D should get the points. He is correct. Its common practice for Diesel and other high performance engines.
- Anonymous1 decade ago
Your guess is as good as mine, but I would say the "D" means the engine was made in Detroit.
