turboking15
15+ Year Contributor
- 352
- 6
- Jul 16, 2007
-
columbus,
Ohio
So i just got my car running not too long ago and am in the process of tuning it. The other day it was idling in the shop and i began hearing what sounded like a rod knock. I just swapped in 3g lifers and had an issue with one of them so i pulled them all and checked them thinking i collapsed one of them but they all checked out fine.
I can only hear the noise at idle. I have tried the long screwdriver trick and a stethoscope but couldnt hear anything that stood out as this is where its coming from. I checked the oil and it is full, clean, and no signs of metal in the oil. Oil pressure is great 20-30psi at idle. The car has dks 272 cams that are shimmed, evo springs/ret, 3g lifters. @.5 to 3" dp with a 3" cutout that i have open in the video. Running an hx40 and a stock long block. I am still working on the tune but right now it idles a bit lean, idle is 1000 rpm and its pulling 12-13" vacuum.
I thought it was a collapsed lifter but they are all good, now think it is either a wrist pin or a bent valve. I will be pulling all the rockers and pressurizing the cylinders to see if they seal. Or is this just what a cammed dsm sounds like with no exhaust?
Heres the vid:
I can only hear the noise at idle. I have tried the long screwdriver trick and a stethoscope but couldnt hear anything that stood out as this is where its coming from. I checked the oil and it is full, clean, and no signs of metal in the oil. Oil pressure is great 20-30psi at idle. The car has dks 272 cams that are shimmed, evo springs/ret, 3g lifters. @.5 to 3" dp with a 3" cutout that i have open in the video. Running an hx40 and a stock long block. I am still working on the tune but right now it idles a bit lean, idle is 1000 rpm and its pulling 12-13" vacuum.
I thought it was a collapsed lifter but they are all good, now think it is either a wrist pin or a bent valve. I will be pulling all the rockers and pressurizing the cylinders to see if they seal. Or is this just what a cammed dsm sounds like with no exhaust?
Heres the vid:
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