What does this sound like to you?

[Don W.]

Re: What does this sound like to you?

NFG as we say. BUT, couple of ideas. My motor sounds like that occasionally on start-up. It's not a bearing, it's done this for years through a couple of rebuilds. I can only surmise that it's "piston slap." Always liked that term. Also years ago I had a big block sounded at least that bad and all it was was a broken piston.

So for an answer cut the filter. Little flakes or big? White? Copper color? Both? Bearings. No metal? You lucked out, it's one of the other ideas.

If I were to bet I'd pick rod bearing.

 

[RealFastV6]

What does this sound like to you?

I guess I wasn't clear enough.

I ended up buying the truck in the OP about 6 months ago. Truck is in great condition aside from the bottom end of course. A lot of good parts and truck is very clean and was obviously well cared for by the owner.

Post below isn't my guess it's the result of the teardown.

In case anybody was wondering...



1 spun rod bearing, rod was very much blackened.

1 spun main bearing.

Thrust on the crank wiped out.



The noise was the rod for sure, that much I had figured out as soon as I heard it and put a timing light to it, but it was also a soup sandwich on top of the rod.

 

[RealFastV6]

Re: What does this sound like to you?

So possible root cause... caps were mixed up on 2 rods, the one that spun and another one. Go Rockford Racecraft!!

Should have the new shortblock back in another week or two and then back together it goes.