Found what was causing my knock

[Justin35ll]

Picked up an engine stand tonight and popped out all the pistons. Found a cylinder 3 rod knock.Havn't taken the crank out yet so not sure how those bearings look yet. I think they will be okay though.



I hope I can get away with just repolishing the crank and new main and rod bearings

Also I need to know if I can reuse these main and rod bolts/nuts or if they need to be replaced
Modified by Justin35ll at 9:24 PM 11/18/2009

[240SXmotoring]

Rod knock definitly sucks. Be sure to either hot tank or just clean very well the oil passages in the block and head. I know of a couple guys that just rebuilt the bottom end with parts but never cleaned the oil passages and had rod knock again 3 months down the line. I would change all the bearings to be on the safe side.

[Justin35ll]

damn, yeah I def want to hot tank the block and head. I found a lot of the shavings, but I'm sure theres probably still some in there

And I am thinking about upgrading the rods, pistons, and bearings, and a metal headgasket just because it's winter so I have about 4 months to do it.

[Justin35ll]

took the crank out and none of the main bearings looked too bad just some minor wear.

I hope my crank is still useable though. Heres some of the scoring on the rod journal with the knock.

[SxMachine]

Good that you found the prob. How long did it take you to tear it down. Ima be tackling it pretty soon as well

[Justin35ll]

Not long 2 days maybe, but the first day it was sitting on the ground. So much nicer once I got it up on the stand

[SxMachine]

So wuts the stat on the build any progress? Which bearings did u decide on btw

[Justin35ll]

I'm just gonna get the clevite rod and main bearings off enjuku.Eagle H beam rodsCP pistons either 86.5 or 87mm bore 9/1 CRARP main and head studsTomei metal headgasket 1.2mm

Or maybe I should just leave it 8.5/1 CR I want to run 20psi of boost
Modified by Justin35ll at 9:23 AM 11/28/2009