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Old 02-21-2021, 10:28 AM   #4
astro.domine
 
Join Date: Jan 2019
Location: Seattle
Age: 31
Posts: 4
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Quote:
Originally Posted by Kingtal0n View Post
The way it gets quieter when you rev usually means rod bearing or wrist pin failure

I admit it sounds like a top end noise but there aren't many types of load-based engine noises and bearing/piston is the most common

I really hope it isn't for you
That would be truly disappointing. Thanks for the info though.
The pistons & wrist pins are new, and all the bearings are new, with clearances under .002".

Quote:
Originally Posted by burnsauto View Post
piston slap? How does the noise relate to engine temp? Does it change at all?

Either way, that engine isn't staying together for too long, either because you take it apart, or it takes itself apart.
Could it be piston slap if it has 160psi+ compression though?
The noise becomes much softer & almost disappears after it warms up.
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