Volvo AWD S70 Forum

INDEX FOR 10/2025(CURRENT) INDEX FOR 7/2004 S70 INDEX

[<<]  [>>]


THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD




  REPLY TO THIS MESSAGE    PRINT   SAVE 

Oil pressure problem S70 2000

posted by  someone claiming to be Tony on  Sat Sep 29 15:13 CST 2012 [RELATED]

I have just rebuilt (lower end new bearings) this 2000 Volvo S70
in the rebuild i used Volvo main bearings and followed the color codding to the tee.
I am having an oil pressure problem (lack of)
At cold idle the oil pressure is well above 4 bar, and rises and falls w/rpm
eventually the warm idle pressure drops to 2 bar.

and this is when the issues begin
when the idle pressure drops to about 2 bar, the pressure NO longer rises w the RPM. AT ALL, and will eventually get down to less then .5bar STILL not raising w rpm and will eventually go to 0

but what confuses me is when it drops to Zero i immediately shut it down..and upon restart the oil pressure goes back to normal for a couple of minutes at idle, and raising w RPM.

i find it hard to believe that the oil cools down in 2 seconds of a stopped engine to "thicken" up and allow oil pressure to build.

Any ideas?

Thank you and all the best







  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Oil pressure problem S70 2000

    posted by  someone claiming to be Tony on  Tue Oct 23 12:02 CST 2012 [RELATED]

    And it fixed it... soo glad it repaired i now have 2.5bar of oil pressure after 1hr of engine running never gets below that and its well over 5 bar at 4000 rpm

    it was an oil supply issue.








    •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

      Oil pressure problem S70 2000

      posted by  fourvolvos on  Wed Oct 24 10:15 CST 2012
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Fri Sep 26 10:51 CST 2014
      [RELATED]

      Good Job Tony. You must be an expert at oil pan removal by now. If your engine has a lot of miles on it and you suspect "gunk" build up in the upper end, toss in a qt. of ATF at each oil change. Change oil and filter at 3,000 miles and in one year the engine will be clean and quiet as new.
      Good luck. I'm in the process of a head gasket replacement on my 2000, S70. It's a no rust,southern car and should be good for another 100K.
      Tom








  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Oil pressure problem S70 2000

    posted by  someone claiming to be Tony on  Mon Oct 8 11:14 CST 2012 [RELATED]

    so after putting a new oil pump and no change, i did what you suggested and checked the oil level while low pressure condition.
    while i had plenty of oil i did notice alot of air bubbles on the dipstick.
    so im investigating the suction part of the oil system. i did remove the oil pan and the oil pick up tube. the o-ring was in great shape but the oil pick up tube screen was "sucked into" the tube itself and there was alot of gunk blocking the pick up tube!








    •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

      Oil pressure problem S70 2000

      posted by  fourvolvos on  Sat Oct 20 19:42 CST 2012
      Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
      last visit: Fri Sep 26 10:51 CST 2014
      [RELATED]

      Problem solved yet? If there is lots of gunk in the oil pan then there probably is lots of gunk in the oil passages in the head and oil return passages.








      •   REPLY TO THIS MESSAGE    PRINT   SAVE 

        Oil pressure problem S70 2000

        posted by  someone claiming to be tony on  Mon Oct 22 19:35 CST 2012 [RELATED]

        Nope not yet..but the latest attempt to resolve is under way.
        I would imagine that "blockage" of any sorts would RAISE pressure.not so much lower it
        one thing i noticed while having a low oil pressure issue is alot of air bubble on the dip stick.
        and the running theory after a second oil pump is the pick up tube.
        i removed the oil pan for the fourth time (P.I.T.A.) i noticed that the oil pick up tube's mesh was sucked in and kinda blocked up..so i would imagine that after running a few min's that hole would get plugged up and deprive the oil pump and forcing it to cavitate the oil and loosing pressure.
        so just today i put it all back together (w new oil pick up tube) and just waiting for things to dry out before i start this puppy back up..







  •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

    Oil pressure problem S70 2000

    posted by  KlausC on  Sun Sep 30 10:55 CST 2012
    Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
    last visit: Fri Oct 24 10:15 CST 2014
    [RELATED]

    Are you using a new oil filter? This sounds like the the flapper in the oil filter is sticking closed and oil is no longer flowing through it.

    Consider this a 'bump' to the top of the queue.
    --
    My name is Klaus and I am a V♂lv♂holic








    •   REPLY TO THIS MESSAGE    PRINT   SAVE 

      Oil pressure problem S70 2000

      posted by  someone claiming to be Tony on  Sun Sep 30 11:38 CST 2012 [RELATED]

      Yes new filter. Im leaning towards a "weak" oil pressure relief valve and is opening way to soon! the oil pump itself checks out well within spec.








      •   REPLY TO THIS MESSAGE Replies to this message will be emailed.    PRINT   SAVE 

        Oil pressure problem S70 2000

        posted by  fourvolvos on  Sun Sep 30 16:24 CST 2012
        Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
        last visit: Fri Sep 26 10:51 CST 2014
        [RELATED]

        When the oil pressure is low or 0 at idle, try to measure the oil on the dip stick. My experience with a 2000 V70 was, all the oil being pumped up to the upper engine and the return ports were too clogged to let it return to the pan. So the pump was sucking air and light would come on. I know this sounds bazaar but it was true. Half of the oil passages in the head were clogged, oil return for the turbo was clogged (pushing oil into the exhaust and making a huge cloud of white smoke).
        This engine sits in my garage after replacing it with one from a wreck.

        I originally thought my problem was the "O" rings but replacing them did no good.
        My oil pressure light would com e on while driving. Stopped and checked the oil and it was full. Never thought to check it when the light was on though.
        The car was an Ebay purchased southern car. Didn't check it out thoroughly, but now I believe the oil was never changed in it's first 50K miles of ownership and never driven on trips longer than shopping and going to church.
        Why did you rebuild (only) the lower end?
        Good luck
        Tom







  •   REPLY TO THIS MESSAGE    PRINT   SAVE 

    Oil pressure problem S70 2000

    posted by  someone claiming to be Tony on  Sat Sep 29 15:14 CST 2012 [RELATED]

    I forgot to mention that i also did replace all the o-rings in the oil pan.







<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.