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Hi All
I am looking to buy some new pistons and rings for my 1500 rebuild...
I have contacted a supplier who suggest based on my measured bore size that I need +.0020” ones but I am not convinced...
Measured bore size is 73.74 on 3 bores and 73.71 on the other. Workshop manual says 73.65 nominal giving 0.06 to .09mm bigger.
Based on 73.59mm nominal piston (from the workshop manual) if I go oversize by .0020”. (.502mm) this would make the piston too big at 74.09mm...so too big..
I suspect he is thinking I am going to re-bore based on the wear, but apart from that they are in good condition.
Am I hopefully I can get away with standard pistons and an oversize piston ring.. or am I way out on my calculations...
You've given them the measurement of the bore, they think you've given them the piston size hence them saying you need a bigger piston.