SergieL

I'm pulling the oil pan right now. I lifted the front wheels of the ground and started the motor in 1st gear and recorded.


Here's the video
https://*******/D1N8

SergieL

Drained the oil and I can see metal flakes, really tiny

SergieL

So the cylinder Thats knocking has a stuck rod bearing. It doesn't move around like the others. So is that the problem? Here a vid

https://*******/5RO1

SergieL

Also found this in the pan. What is it?

m4xwellmurd3r

Thats a crank pulley key.

You have a spun bearing. Time to buy a new crank and rods. Beating on it with that noise has destroyed the bottom end.

SergieL

How did it destroy the bottom end?

Crank is smooth, can't feel a thing when I swipe my finger nail thru. Just a bearing. I think I got lucky because evwrything in cylinder 3 are is smooth. The rod is smooth aswell, I can only see purple marks from heat and that's about it.

m4xwellmurd3r

Crank is most likely ground down out of spec, rod is now trash. Blueing from heat means the metal is compromised. It also is probably out of spec now.

Just because your nail isnt catching doesnt mean its "good"

Pull the engine apart and have the crank sent to a machine shop to make sure its still within oe tolerances. Its probably trash since from what ive been reading, you kept gettin on it with it knocking.

Rod is trashed.

turbohatch96y7

iTrader: (15)

Damn im good

Flr Power

How do the other bearings look like? Did you use plastigage to measure clearance on the rods?
After all you said oil pressure was normal...

LTCxD2B

This similar thing happened to a friend a couple weeks ago he didn't drive it like a fool but it got knocking and his bearing just melted instead of spinning ... Had good oil pressure so I'm pretty sure the clearances wer not big enough for boost

SergieL

Oil pressure was fine, I didn't pull the other bearings because this is the only one I have a problem with. Others looked like they move side to side smoothly but don't move up and down

Flr Power

I think you do not understand that you MUST take it ALL apart to recheck everything.

SergieL

I understand that but there has been spunned bearings that has been changed without turning the crank. If my damage is that bad that I have to turn or replace that crank than I will. I can 2 LS cranks to my disposal.

m4xwellmurd3r

You need a new rod too, and have the rods rebalanced

KevinEF7

To be honest if all youve done is taken the one rod cap off, with what I see, I would throw a new bearing on that rod, re torque it, put the oil pan on back on and see what happens. It would be a miracle but that rod end doesnt look near as bad as that noise was making it out to me

turbohatch96y7

iTrader: (15)

Metal shavings in the oil pan would make me tear down the motor and clean it



But op seems like a retard so ill wait for his " head and block ruined, why?" Thread

SergieL

That's what I'm going to do for now. I'm thinking about going with s different bottom set up. Ditching the high compression for lower to run higher boost.

turbohatch96y7

iTrader: (15)

Lmao

SergieL

What's funny about that?

LightningTeg

lol thats pretty terrible logic. You could have a bad plug or cooling issues in that cylinder. Injector could be flowing less or dirty etc.

SergieL

It drove perfect so couldn't be detonation I would think. Also, I switched the plugs around. But now I know it's the bearing.

LightningTeg

Eh, not exactly. If the crank journal was truly messed up, that bearing and rod would have looked a hell of a lot worse. The crank is hardened, nitride coated steel. If it had real damage, you would know. It probably just needs a polish to be back to normal.

I toasted a rod bearing once and had to drive it 10 miles or back to my house before the knocking really started. Bearing was squeezed out of the rod journal and ate up the crank. Rod was fixed up by machine shop and its been in my car for the last 3 years making 600whp.

SergieL

Damn that's bad. Do you think that know is really die to this bearing? The rod was stuck and had no movement what so ever on the crank journal, not even side to side.

SergieL

That's the outer side of the bad bearing.

Flr Power

And the inner side...