Help With Answer Please

[trimmer]

Hi everyone. Great forum

i have a r32 gtr, and im doing an engine rebuild with my mechanic freind it will be 2.7Liters now with wisco forges, beefed up standard turbos, with n1 oil pump, 3inch exhust from the firewall back. my mechanic put the engine back together. i drove it easy on 5psi, the car was running fine for two days then it spun a bearing. the oil pressure sometimes fluctuats when idling. so he pulled the motor out changed the bearing put the motor back in started it, i drove it for two weeks easy on 5psi then spun the bearing AGAIN. so his doing it all again without any new knowlage or a solution.

So anyone out there with helpfull information or answers PLEASE post

sory about the long story. thanx.

Edited March 18, 2006 by trimmer

[Duncan]

umm did your mechanic mate check the bearing clearances or more likely bent crank shaft?

[SteveL]

Get a different mechanic (one that know's what they're doing).

[trimmer]

umm did your mechanic mate check the bearing clearances or more likely bent crank shaft?

yeh he sent the crank for machine n balance..maybe it is there mistake? first it was bearing 3 then bearing 2.

cheers.

[Johnny Cash]

Yeah, my vote's in for getting a mechanic who knows what he's doing.

[trimmer]

anyone else?

[Duncan]

well assuming the crank is straight, bearing clearances are OK and you had good oil pressure (you did, right?) thats a bit tricky.

Possibly blocked oil galleries somewhere?

[trimmer]

well assuming the crank is straight, bearing clearances are OK and you had good oil pressure (you did, right?) thats a bit tricky.

Possibly blocked oil galleries somewhere?

the oil pressure was good when driving but when i stoped it would some times go down when idling. yeh we thoght it was the galleries the first time so we put a high pressure gurney through the galleries cleaned them very wel. but that didnt help.