Rb26 Main Bearings Destroyed. ?

[6InlineTT]

So whilst pulling down my rb26 I noticed a rather large amount of bearing material in the sump.

Oil pump was fine, not caused by surge. Conrod bearings were fine but mains had been worn away to the point where they were just a shell.

interesting thing is that the motor is about 1000km old.

the main bearing had the oil groove on the bottom half(where all the force is exerted. Unless there is some sort of rb26 majic trick that allows this to lubricate sufficiently, id say the engine builder f****ed up. Or is this normal??

Tomei restrictor/head drain enlarged also.

Any thoughts? Next step is crank regrind and new bearings.

the car should be 400awkw with hks2540. Hks264s and forged. Im thinking 1.5-2thou bearing clearance with the n1 pump should do nicely?

Cheers

Blake

[Ben C34]

That ducks dude. Oil groove shouldn't be on the bottom.

Tidy your room !

[6InlineTT]

Hahaha too busy with engines to clean

Well im glad I know the problem is easily solved.

Cant wait to have her back on the road.

[GTRPSI]

Are all the main bearings like that?

Id be asking why, have you checked if the crank was straight on the last build?

What were the clearances like on the old build?

What weight oil were you running on those clearances?

Im not a fan of regrinding cranks, you start removing the hardened outer coating, not something i like on power builds.

[6InlineTT]

Every single main was the same. Rod bearings were fine, no idea on the clearances, it was running royal purple possibly 10w-60 thats from memory.

Ill get the crank checked out, all I have to go on is receipts from the last build as I bought the car with bearings rattling.