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Old 03-15-2024   #1
phrogs
 
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Join Date: Jul 2004
Location: Kalamazoo MI
Posts: 1,738
Default Any Idea what that noise is?

Looking for opinions what do you hear?

It is a DRM 500 package top end ported It has aftermarket connecting rods, after market pistons marked PMI388/I not sure about the cylinder liners, and I am pretty sure it had Nitrous run on it from the holes drilled in my storage compartment.

I have no idea the abuse this engine had prior to me getting it but it has been fine for 19 years with a couple of misfire issues here and there.

I have been driving it as a daily for years and it has always puffed a little oil smoke.

I know I have something going on so im not to worried about it just want to figure it out before I yank it out.

Video

https://www.youtube.com/watch?v=5V4tnQdGc6Q




I had Amsoil 10w40 high zinc in it put in last spring.

I checked all over the place with my mechanic stethoscope couldn't really isolate it.
Oil pressure was still good
Last compression test was good but I have not checked it yet.


I am pulling the oil pan to check for anything obvious I'm guessing a rod bearing.


lifter? piston ring? piston slap or a rod knock.


I cut open the oil filter and I have small ferrous metal in the filter not a lot but some.


Anyway why do you all think it is?
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JOHNNY P

Currently own

90 ZR-1 #845 DRM 500 engine package

90 #226 Might be a parts car not sure yet

Last edited by phrogs; 03-15-2024 at 04:23 PM.
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