Bearings break up on track due to low oil pressure

BISH V8 · Post by **BISH V8** » Sun Sep 04, 2016 6:08 pm

I just cant understand it, striping down engine why cant I see much damage to the bearings, in the strainer you can see quite a bit of copper and I would say about the same amount has been cleaned from sump, where has it all come from, bearings 3-4 are wore but it is just not enough, the crank has burn marks which can be repaired as it isn't scored, I was expected something with more damage for the amount of copper fillings and the noise the engine made from video..
Any suggestions where its come from

ChrisJC · Post by **ChrisJC** » Sun Sep 04, 2016 6:08 pm

Presumably a regrind and a new set of shells will sort that out?

Chris.

BISH V8 · Post by **BISH V8** » Sun Sep 04, 2016 6:21 pm

Yes crank can be reground.
Closer image of bearings 3-4

SimpleSimon · Post by **SimpleSimon** » Sun Sep 04, 2016 7:56 pm

I can believe that noise and all that copper from those big ends bearings they are in awful shape

I would get those journals miked up too, 5 & 6 rod journal dont look healthy from here

minorv8 · Post by **minorv8** » Mon Sep 05, 2016 6:58 am

I have opened my Accusump and it is a piece of cake. You can´t really damage the O-rings unless you are extremely careless. With that much crap I would clean everything, remove the oil gallery plugs etc and double check that it is really 100 % clean.

As for the crank, looks like it needs a regrind.

Eliot · Post by **Eliot** » Tue Sep 06, 2016 12:33 pm

BISH V8 wrote:

Must agree that there seems to be more swarf in there than just two failed big end shells.
Have you checked the cam bearings?

Darkspeed · Post by **Darkspeed** » Tue Sep 06, 2016 3:19 pm

If you have taken those BE's shells down to the backing steel I am not surprised by that amount of material.