Welcome to the North American Subaru Impreza Owners Club Friday March 29, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 02-26-2012, 12:44 AM   #1
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default Zero oil pressure

Hi guys. Can anyone give me some insight as to why a jammed shut oil pressure relief valve would have resulted in zero oil pressure? I thought that an oil pressure relief valve jammed shut would cause high pressure, not low or zero...
* Registered users of the site do not see these ads.
renhoek is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-26-2012, 01:35 AM   #2
danetrainer
Scooby Newbie
 
Member#: 101076
Join Date: Nov 2005
Default

Agreed.

Are you saying you replaced the oil pump and the problem is fixed?

Or, if the source of the problem has not been resolved...have you checked the oil pick-up tube? They can break at the flange where its bolted to the block and not draw oil to the pump.
danetrainer is offline   Reply With Quote
Old 02-26-2012, 04:55 AM   #3
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default

Quote:
Originally Posted by danetrainer View Post
Agreed.

Are you saying you replaced the oil pump and the problem is fixed?

Or, if the source of the problem has not been resolved...have you checked the oil pick-up tube? They can break at the flange where its bolted to the block and not draw oil to the pump.
Cause of the no pressure is unresolved. Oil pick up tube is fine, no cracks.

Will install a new pump but just cannot figure out what has gone wrong.
renhoek is offline   Reply With Quote
Old 02-26-2012, 04:58 AM   #4
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default

Anything I should do with the new pump before I install?
renhoek is offline   Reply With Quote
Old 02-26-2012, 09:53 AM   #5
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

blockage in the system somewhere????......if you had no oil pressure the engine would blow up real quick
Uncle Scotty is offline   Reply With Quote
Old 02-26-2012, 03:52 PM   #6
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default

The zero pressure happened when starting the engine for the second track session. Engine was cool. No noises from engine (yet) but I guess we will see when I install the new pump.

Almost like the pump was cavitating ( which I know it does not do) but the jammed relief valve is all I can see that is wrong
renhoek is offline   Reply With Quote
Old 02-26-2012, 05:56 PM   #7
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

pull the filter off and cut it open.....that may tell the tale
Uncle Scotty is offline   Reply With Quote
Old 02-27-2012, 01:18 AM   #8
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default

Great idea Scotty. I will get onto it tonight.
renhoek is offline   Reply With Quote
Old 02-27-2012, 02:39 AM   #9
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default

Well, I have cut it open and it just looks like a normal filter. Nothing obvious there and filter not blocked.
renhoek is offline   Reply With Quote
Old 02-27-2012, 10:24 AM   #10
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

mmmmmm....that's a good one
Uncle Scotty is offline   Reply With Quote
Old 02-27-2012, 12:54 PM   #11
bako
Scooby Specialist
 
Member#: 226211
Join Date: Oct 2009
Location: Europe
Vehicle:
2002 impreza WRX JDM
blue

Default

remove stock oil pressure sender and rotate engine by hand. look, if you have oil coming. if there is empty, fill that channel with oil and try again
bako is offline   Reply With Quote
Old 02-27-2012, 05:48 PM   #12
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default

I have the pump off the engine at the moment as I am awaiting delivery of a new pump. I really don't want to reinstall the old pump, reset the timing just to try this.

Call me lazy.......

This problem is very odd and I am hoping that for whatever reason, the new pump fixes the problem.
renhoek is offline   Reply With Quote
Old 02-27-2012, 06:26 PM   #13
Bacon117
Scooby Specialist
 
Member#: 118500
Join Date: Jun 2006
Chapter/Region: MWSOC
Location: Michigan
Vehicle:
02 Silver Wagon
"Stage 2"

Default

Are you sure the oil pressure sender isn't bad?

When I was a kid, I replaced a fuel pump b/c I didn't realize the car was out of gas. Doh!
Bacon117 is offline   Reply With Quote
Old 02-28-2012, 05:43 AM   #14
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default

2 separate sensors. Both report a problem.
renhoek is offline   Reply With Quote
Old 03-02-2012, 12:49 PM   #15
bako
Scooby Specialist
 
Member#: 226211
Join Date: Oct 2009
Location: Europe
Vehicle:
2002 impreza WRX JDM
blue

Default

how can you not to open pump and look in it? strange laziness
bako is offline   Reply With Quote
Old 03-03-2012, 06:35 AM   #16
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default

I have opened up the pump and again, it looks fine. No sign of wear or damage and 3 thou clearance between rotors and backing plate.
renhoek is offline   Reply With Quote
Old 03-03-2012, 06:37 AM   #17
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default

I installed another pump today (after I checked it was all fine), started her up and pump is good. Will run the car tomorrow until it is warm, then drain the oil and see if I have any bearing damage.
renhoek is offline   Reply With Quote
Old 03-03-2012, 01:21 PM   #18
bako
Scooby Specialist
 
Member#: 226211
Join Date: Oct 2009
Location: Europe
Vehicle:
2002 impreza WRX JDM
blue

Default

I bet that was priming issue. even shot oil pump is able to pump some amount of oil with some pressure
bako is offline   Reply With Quote
Old 03-04-2012, 05:51 AM   #19
renhoek
Scooby Newbie
 
Member#: 71339
Join Date: Sep 2004
Chapter/Region: International
Location: Victoria, Australia
Vehicle:
1995 WRX STi RA
1995 WRX STi LS1

Default

Your guess is as good as any, but I just can't see how an oil pump would "unprimed" itself.

Anyway, all good now, and I installed an Accusump while I was at it!!!
renhoek is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Drop in oil pressure / low oil pressure magicstop Newbies & FAQs 3 07-24-2015 11:13 PM
Oil pressure reading zero biglongdong Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 7 02-19-2010 09:41 AM
Prosport Premium Gauges 52mm Oil Pressure and Temp Remote Oil Pressure Sender Kit skribblez32 Interior/Dressup/Audio & Security 4 07-01-2009 03:50 PM
Oil filter relief pressure / oil pressure spec mattwho Service & Maintenance 1 05-25-2009 11:11 PM
Fuel pressure, Oil pressure, and Oil temp gauges that fit in a single din? annointed Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 2 10-23-2002 11:40 AM

All times are GMT -4. The time now is 01:29 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.