Oil pump vent?? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 06-10-2010, 04:02 AM   #1
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Jul 2009
Location: Batavia, IL
Posts: 604
Total Cats: 0
Default Oil pump vent??

My car has been leaking oil BADLY from the oil pump ever since I rebuilt the engine. I was thinking it may have been a bad oil outlet o-ring and was going to pull the engine again, but on closer inspection I noticed something peculiar when I was pulling my power steering pump... there was a hole on the oil pump housing.

"Hmmmmm" I thought. I then shined my flashlight down the hole. I could see all the way through to the pan. I then unwound a coathanger and shoved it in. Sure enough, it went all the way in and came out dripping with lube. Since I threw out my old oil pump, I could not verify if this hole in the new pump is supposed to be plugged or not. Could somebody check for me pleeeeease??

Name:  IMG_6166.jpg
Views: 204
Size:  85.4 KB


The car only leaks oil under load at WOT, and it leaks A LOT. It has sprayed everywhere in my engine bay, and I cannot touch anything in there without getting oil on me.
Cococarbine3 is offline   Reply With Quote
Old 06-10-2010, 04:07 AM   #2
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,105
Total Cats: 518
Default

Quote:
Originally Posted by Cococarbine3 View Post
I cannot touch anything in there without getting oil on me.
We couldn't tell.

It should be sealed. Originally it was the dipstick tube hole for the 323 I believe. I think I have silicone in mine, or a JB welded plug, not sure, its from the factory.

Edit: if you're good with cleaning out your engine, looks like you might be able to drill a bit oversized and tap it for an NPT plug. 1/8 or 1/4.
curly is offline   Reply With Quote
Old 06-10-2010, 09:52 AM   #3
Elite Member
iTrader: (2)
 
fooger03's Avatar
 
Join Date: Jan 2009
Location: Columbus, OH
Posts: 4,132
Total Cats: 187
Default

Mazda makes a plug that goes in that hole. If you bought your pump from mazdamotorsports website, they will have included that plug with the oil pump. I'll see if i can get a P/N for it...

mazda part number:
9930-71-000

it looks like it runs $1.38

taps in with a punch and light taps from a hammer.
fooger03 is offline   Reply With Quote
Old 06-10-2010, 12:22 PM   #4
Senior Member
 
steelrat's Avatar
 
Join Date: Jul 2005
Posts: 514
Total Cats: 0
Default

Best guess, it's the dipstick hole for a front drive oil dipstick. I think if you read on the fwd/rear drive conversion, there's something about having to plug that.....

The above part should fix it though.....

Dave,
steelrat is offline   Reply With Quote
Old 06-10-2010, 12:31 PM   #5
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

I've just used a slightly oversized bolt that I could thread in with a wrench before. Using JB as a sealant.
neogenesis2004 is offline   Reply With Quote
Old 06-10-2010, 04:47 PM   #6
Senior Member
Thread Starter
iTrader: (1)
 
Join Date: Jul 2009
Location: Batavia, IL
Posts: 604
Total Cats: 0
Default

Awesome thanks guys. I got my pump from NAPA and had to make a pickup tube gasket and find a circular oil outlet o-ring. I didn't realize there was more.

I'm not sure if this is the problem though because whenever I accelerate, my oil pressure goes down. I guess we'll see if plugging this works.
Cococarbine3 is offline   Reply With Quote
Old 06-11-2010, 03:10 AM   #7
Elite Member
 
codrus's Avatar
 
Join Date: Mar 2007
Location: Santa Clara, CA
Posts: 3,877
Total Cats: 344
Default

Quote:
Originally Posted by fooger03 View Post
Mazda makes a plug that goes in that hole. If you bought your pump from mazdamotorsports website, they will have included that plug with the oil pump. I'll see if i can get a P/N for it...

mazda part number:
9930-71-000

it looks like it runs $1.38

taps in with a punch and light taps from a hammer.
FWIW, the pump I bought from mazdacomp did not include the plug, I had to order it later, separately.

--Ian
codrus is offline   Reply With Quote
Old 06-11-2010, 03:12 AM   #8
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,362
Total Cats: 1,323
Default

Quote:
Originally Posted by codrus View Post
FWIW, the pump I bought from mazdacomp did not include the plug, I had to order it later, separately.

--Ian
+1, my replacement pump did not come with that plug. I used JBweld and a square of aluminum to seal it off. Next time I have it apart (hopefully never) I'll order that plug.
Savington is online now   Reply With Quote
Old 06-11-2010, 08:50 AM   #9
Elite Member
iTrader: (2)
 
fooger03's Avatar
 
Join Date: Jan 2009
Location: Columbus, OH
Posts: 4,132
Total Cats: 187
Default

Quote:
Originally Posted by Cococarbine3 View Post
I'm not sure if this is the problem though because whenever I accelerate, my oil pressure goes down.
Either a: you've run so low on oil that it runs low around the pickup tube and you get air in there

or b: the pickup tube gasket you 'made' failed, and air is getting into your oil pump that way.
fooger03 is offline   Reply With Quote
Old 03-13-2011, 11:41 PM   #10
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,362
Total Cats: 1,323
Default

Quote:
Originally Posted by Savington View Post
+1, my replacement pump did not come with that plug. I used JBweld and a square of aluminum to seal it off. Next time I have it apart (hopefully never) I'll order that plug.
Bump, that plate came off of the pump and oiled down the engine bay at Buttonwillow yesterday. Do as I say, not as I do - get the OEM plug.
Savington is online now   Reply With Quote
Old 03-14-2011, 08:24 AM   #11
Senior Member
iTrader: (10)
 
Join Date: Aug 2007
Location: Fredericton, NB
Posts: 1,187
Total Cats: 4
Default

Looks like you've got yourself an easy fix.... GO to mazda dealer, order plug...tap in till it's flush.

Spray everything down with brake cleaner, go for a drive...
Preluding is online now   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
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 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


Thread Tools

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 11:22 AM.