repair damaged BE oil pump?
 

had a problem in the last reac of the season where the bearings collapsed in the turbo sending fragments into the sump and then through the engine. all bearings and crank were to throw away. anyway... the BE oil pump has some small marks where some material has made its way through. do you think the marks could be dressed and the pump will still be ok to use? otherwise i have a brand new standard pump. you think this would be ok at 400bhp? the engine does have an ATI damper.

thoughts?

No and No imo

depends how small the marks are really. if it inhibits the pump from pumping/spinning, then they are junk. but if it still works well, and they are merely cosmetic, then it should be ok.

pics?

pump still spins fine. there is literally 1 pit on every lobe where a part has gone through. pump has only been in 6 months. be a real pain if it has to be replaced.

does it suck? spinning is one thing, pumping oil is another.

tbh, id try to get hold of Travis and ask what he thinks.

also pics.

i could easily reassemble and find out. could take some pics but my mans camera is at home. could have a go with the mobile.

Think of how much of a pita it will be if you put everything back together only to not have proper oil pressure or something like that, and either have to tear it all back down to replace it, or lose another motor.

turns out the pics from the phone are not too bad.

https://www.miataturbo.net/attachmen...ine=1351083254

https://www.miataturbo.net/attachmen...ine=1351083254

https://www.miataturbo.net/attachmen...ine=1351083254

the damage is very light and barley catches your finger nail.

know what your saying and it would be a real pain if it isn't rite. just rather not spend all that money again if its not needed. on the other hand this is probably the most important part of the engine and has to be perfect...

Exactly. The damage doesn't look bad to me either, but I still probably wouldn't risk it.

The fact that you track your car makes it 4x as important to have top notch parts that you know won't fail

just been and showed the guy i use for my machining and he said it will be perfectly fine and not to waste my money on a new one...... hmmm what to do.. its a bit of a risk

For a dedicated track car I would put in a whole new BE race pump. After personally dealing with oil pressure issues, I will not hesitate to make sure I have a new one in any motor that has seen any sort of metal going through it.

I'd use those gears. I've had great luck with oil pressure though. So maybe I don't know how sensitive they are to nicks and scratches.

Don't be stupid. You're risking another $3000 motor over a $400 part. What you probably can't see (and haven't thought about) is the scoring in the bore of the relief valve which will cause oil pressure isues. Replace it.

checked the PRV and it is all good. reassembled the pump and it seems good. seems a bit of a waste if there is nothing wrong with this one. would prefer to replace ideally.

If it was going into a street car I would 100% agree with you. Since it is going in a car that will spend a good amount of time on track, I have to agree with Savington, that a new one should be ordered and installed.

I work with UHV pumps everyday and my opinion is that you should call the company and ask what the tolerances are for the gears. Those marks may be smaller than the tolerances of the tooling for machining. An oil pump is not that complicated and oil is viscous. If you can polish the marks out and still maintain the proper clearances it is probably fine.

The bigger risk if those marks are bigger than they look is that you created stress risers all over the gears or bent them. Have your machinist measure everything before you decide.

just buy a set of gears. someone on here is selling a set

already looking into another pump complete race pump. going to keep this one for a future project on a standard engine that i don't care about.

Nicks in gears will make more little forged steel pieces/shavings/chips/glitter travel downstream, maybe into the relief valve, turbo bearings, etc. On an N/A road car, yes, but a high strung turbo track car, never.