new build piston hitting heads .help
#2
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Yeah, its called "piston to valve" contact. Typical when you run a long duration/high lift cam with pistons that don't have valve reliefs. Nothing you can you can do. He needs to fly-cut the pistons or run a smaller cam.
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#8
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thanks for the replies guys. he did say he is using stock headgaskets.
i forgot to ask if he ordered ls1 or lq4 headgaskets lol cos if he ordered ls1 headgaskets then that would be the problem.
thanks all. i will find out today.
is there any other possible situation that could cause this? i mean, i had 862 and 317 heads on the thing and never had a problem.
i forgot to ask if he ordered ls1 or lq4 headgaskets lol cos if he ordered ls1 headgaskets then that would be the problem.
thanks all. i will find out today.
is there any other possible situation that could cause this? i mean, i had 862 and 317 heads on the thing and never had a problem.