repair damaged BE oil pump? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Engine Performance This section is for discussion on all engine building related questions.
Sponsored by:
Sponsored by:

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 10-24-2012, 08:59 AM   #1
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default 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?
mr2daj is offline   Reply With Quote
Old 10-24-2012, 09:02 AM   #2
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

No and No imo

Last edited by 18psi; 10-24-2012 at 09:16 AM.
18psi is offline   Reply With Quote
Old 10-24-2012, 09:09 AM   #3
Tea of the Sea
 
StarletRick's Avatar
 
Join Date: Apr 2010
Location: Essex, UK
Posts: 113
Total Cats: 4
Default

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?
StarletRick is offline   Reply With Quote
Old 10-24-2012, 09:38 AM   #4
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

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.
mr2daj is offline   Reply With Quote
Old 10-24-2012, 09:40 AM   #5
Tea of the Sea
 
StarletRick's Avatar
 
Join Date: Apr 2010
Location: Essex, UK
Posts: 113
Total Cats: 4
Default

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.
StarletRick is offline   Reply With Quote
Old 10-24-2012, 09:42 AM   #6
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

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.
mr2daj is offline   Reply With Quote
Old 10-24-2012, 09:44 AM   #7
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

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.
18psi is offline   Reply With Quote
Old 10-24-2012, 09:54 AM   #8
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

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







the damage is very light and barley catches your finger nail.
Attached Thumbnails
repair damaged BE oil pump?-imag0085.jpg   repair damaged BE oil pump?-imag0086.jpg   repair damaged BE oil pump?-imag0083.jpg  
mr2daj is offline   Reply With Quote
Old 10-24-2012, 09:57 AM   #9
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

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...
mr2daj is offline   Reply With Quote
Old 10-24-2012, 10:32 AM   #10
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

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
18psi is offline   Reply With Quote
Old 10-24-2012, 11:27 AM   #11
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

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
mr2daj is offline   Reply With Quote
Old 10-24-2012, 11:37 AM   #12
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,780
Total Cats: 1,106
Default

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.
shuiend is offline   Reply With Quote
Old 10-24-2012, 12:32 PM   #13
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,110
Total Cats: 518
Default

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.
curly is offline   Reply With Quote
Old 10-24-2012, 02:00 PM   #14
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,372
Total Cats: 1,333
Default

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.
Savington is offline   Reply With Quote
Old 10-24-2012, 02:27 PM   #15
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

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.
mr2daj is offline   Reply With Quote
Old 10-24-2012, 04:03 PM   #16
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,780
Total Cats: 1,106
Default

Quote:
Originally Posted by mr2daj View Post
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.
shuiend is offline   Reply With Quote
Old 10-24-2012, 04:27 PM   #17
Junior Member
iTrader: (1)
 
Join Date: Jan 2011
Posts: 377
Total Cats: 0
Default

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.
3rdCarMX5 is offline   Reply With Quote
Old 10-26-2012, 12:12 PM   #18
Senior Member
iTrader: (12)
 
Join Date: May 2008
Location: Roselle, Illinois
Posts: 846
Total Cats: -35
Default

just buy a set of gears. someone on here is selling a set
Hot_Wheels is offline   Reply With Quote
Old 10-26-2012, 12:56 PM   #19
Junior Member
Thread Starter
iTrader: (-1)
 
Join Date: Jun 2010
Posts: 218
Total Cats: 5
Default

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.
mr2daj is offline   Reply With Quote
Old 10-26-2012, 01:43 PM   #20
Moderator
iTrader: (11)
 
sixshooter's Avatar
 
Join Date: Nov 2008
Location: Tampa, Florida
Posts: 15,687
Total Cats: 1,562
Default

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.
sixshooter is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
OTS Bilstein to motorsports ASN conversion stoves Suspension, Brakes, Drivetrain 5 04-21-2016 04:00 PM
Moroso Air Oil Separator Catch Can Aroundcorner Miata parts for sale/trade 2 10-01-2015 04:20 PM
Walbro 255lph Fuel Pump $50 lsc224 Miata parts for sale/trade 2 10-01-2015 10:17 AM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 03:23 AM.