Thread: 351 v6 noisy?
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Old September 6th, 2023, 06:34 AM
bigblockv6 bigblockv6 is offline
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Default Re: 351 v6 noisy?
Quote:
Originally Posted by LEWISMATKIN View Post
These engines have an noisy valve train that has a "clackety-clack" noise that is NORMAL and has to be heard for the engine to run properly. the only V6 engines that DO NOT have this sound is ones like Pete Chronis' LD-478 which has a SPECIAL GROUND CAMSHAFT FOR USE WITH HYDRAULIC LIFTERS. If your camshaft hasn't been reground with the profile like Pete's, it must make this noise or you will burn up the valves. I hope this helps with the understanding of the operation of the GMC V6. Also, the video that Fetch provided is a spot on tutorial for running the overhead on the V6 engines.:w ub:
Lewis, actually the custom ground cam in my 478 remained the solid lifter type so my 478 has plenty of the clackety clack noise going on.
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