Oil Pressure

[4drlvr]

Guys and gals

My rb26dett is really starting to give me the shits, to give u a little history.

The engine got rebuilt wif aftermarket pistons, conrods, bottom end bearings, jun oil pump and hks stage 1 cams.

Ran the engine in for the and took the car in for the 1500kms service to change the oil.

After the oil change i took it for a test drive near the mechanic shops and gave it a good boot and as i slowed down realised i blew a bottom end bearing on piston 1, which left me confused. I remember when i got the car back to the mechanic shop the oil pressure was still high.

Out came the engine again the crank got sent away to get machined, all parts got put back together started the car and oil pressure was really low and the jun oil pump had a bit of play.

Out came the engine again and replaced the jun oil pump with an N1 oil pump, put it back in and the friken oil pressure is still not holding. We've tried different oil pressure guages, oil pressure sensor but the oil pressure does not wana stay up.

Engine is out again......its certainly got me and the mechanic baffeled not knowing whats causing this. All up the car has been off the road for over a month, so please any help will be good.

Is there somewhere we should be looking for a blockage, the oil pressure is sitting on the first line on the oil guage and when you rev the car it sits just under 4......

Please help, i miss my car.............

[SECURITY]

try a different machinist.

if he didnt get the clearances right the first time why would you send it back to the same guy?

sure, id make him pay for it - but id send it to another machinist.

when he re-ground the crank he probably didnt use the correct specs. get a new crank and test it with some plastigauge before you throw it back in.

did your mechanic do a crush test with some plastigauge when you got the crank back, or did he just throw it in thinking it would all be fine?

[WARLORD]

try a different machinist.

if he didnt get the clearances right the first time why would you send it back to the same guy?

sure, id make him pay for it - but id send it to another machinist.

when he re-ground the crank he probably didnt use the correct specs. get a new crank and test it with some plastigauge before you throw it back in.

did your mechanic do a crush test with some plastigauge when you got the crank back, or did he just throw it in thinking it would all be fine?

100% right

[4drlvr]

hi guys

thanks for the replies, he did do a squish test before putting on the bottom end bearings and they all fell through under the correct measurements.....

il talk to the mechanic and see what he has to say about sending it to another shop but if the squish test came out fine, then the crank would have been measured and re-machined correctly right???

Lemme know guys please

Thanks

Rj

[SECURITY]

but how did he do the test?, how many pieces did he use on each bearing? which one did he use?

are you merely going off his word or did you see this yourself?

my opinion would be to get a new crank, or if yours is still serviceable get it to another machinist and get him to check the thrust bearing clearance as well as check the crank for run-out.