3800 series 1 oil pump

  1. Welcome to GM Inside News Forum – General discussion forum for GM

    Welcome to GM Inside News Forum - a website dedicated to all things GM.

    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, at no cost, 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, Join GM Inside News Forum today!
     
+ Reply to Thread
Results 1 to 10 of 10

Thread: 3800 series 1 oil pump

  1. #1
    2.5L Iron Duke
    Join Date
    Oct 2011
    Posts
    18
    Thanks
    0
    Thanked 0 Times in 0 Posts

    3800 series 1 oil pump

    i have a 1990 buick riviera and how hard would it be to do a oil pump on mine

  2. Remove Advertisements
    GM Inside News
    Advertisements
     

  3. #2
    4.4 Liter Supercharged Northstar Lowboy's Avatar
    Join Date
    Sep 2010
    Location
    Warren, Ohio
    Posts
    2,694
    Thanks
    15
    Thanked 43 Times in 31 Posts

    Re: 3800 series 1 oil pump

    Shouldn't be too hard as it is under the front cover.

    Why do you think it needs replaced?

    Have seen cars around that year that would occasionaly have the oil pressure bypass seize in the front cover and not build proper oil pressure.

    Highly recommend diagnosis and tear down BEFORE ordering parts.

  4. #3
    2.5L Iron Duke
    Join Date
    Oct 2011
    Posts
    18
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: 3800 series 1 oil pump

    well i replaced my oil pressure switch cause my oil pressure gauge was bouncing al the time and so then after i replaced it went down alot and so i checked my oil pressure and its suppose to be 40 to 80 psi and mine barely read it so i reved the car just to make sure it actually worked and it was about 8 psi

  5. #4
    Chevrolet VOLT F14CRAZY's Avatar
    Join Date
    May 2006
    Location
    Dimondale, MI
    Posts
    10,031
    Thanks
    24
    Thanked 48 Times in 39 Posts

    Re: 3800 series 1 oil pump

    I'd try a test gauge before tearing into it but the oil pump can be serviced by removing the timing cover. Not too bad to do with the engine left in the car.

    Also may want to check the oil pickup screen in the oil pan. I had good pressure but when I went to replace my pan gasket I found a lot of sludge on it. I did switch to synthetic oil after the car had like 150k miles so its debatable on how that got there. On the 3800 car boards it does not seem to be a widespread problem
    '07 Subaru Forester 2.5X 5MT. Bought new. 164k miles. '05 Dodge Durango Limited Hemi AWD. Mom bought new. 90k miles. '74 Buick LeSabre Luxus convertible. 455/7.5L, Quadrajet, dual exhaust. '89 Buick Reatta. 3800 SII L67/F40 six speed swap to be completed someday.

    '87 BMW K75. Pichler V1 fairing. '87 Kawasaki 650SX. '85 Bayliner Capri 1952. 3.0L OMC. Restored. '71 Chris Craft Coho 33'. Twin 327QA's. Basketcase but restoration in progress. '70? Amphicat 6x6 AATV. 13 hp Honda swap.

  6. #5
    2.5L Iron Duke
    Join Date
    Oct 2011
    Posts
    18
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: 3800 series 1 oil pump

    well ive been putting sythetic in ever since i had the car with 60000 on it and now it has 142 on it. or i would rip the engine out and put a series 2 s/c in it but idk how much of a hassle that would be either

  7. #6
    Chevrolet VOLT F14CRAZY's Avatar
    Join Date
    May 2006
    Location
    Dimondale, MI
    Posts
    10,031
    Thanks
    24
    Thanked 48 Times in 39 Posts

    Re: 3800 series 1 oil pump

    Quote Originally Posted by riviera35 View Post
    well ive been putting sythetic in ever since i had the car with 60000 on it and now it has 142 on it. or i would rip the engine out and put a series 2 s/c in it but idk how much of a hassle that would be either
    You could say I've been there, done that...not for the faint of heart
    '07 Subaru Forester 2.5X 5MT. Bought new. 164k miles. '05 Dodge Durango Limited Hemi AWD. Mom bought new. 90k miles. '74 Buick LeSabre Luxus convertible. 455/7.5L, Quadrajet, dual exhaust. '89 Buick Reatta. 3800 SII L67/F40 six speed swap to be completed someday.

    '87 BMW K75. Pichler V1 fairing. '87 Kawasaki 650SX. '85 Bayliner Capri 1952. 3.0L OMC. Restored. '71 Chris Craft Coho 33'. Twin 327QA's. Basketcase but restoration in progress. '70? Amphicat 6x6 AATV. 13 hp Honda swap.

  8. #7
    R2-D2 Astromech Droid Smaart Aas Saabr's Avatar
    Join Date
    Oct 2003
    Location
    Montréal, Québec
    Posts
    17,649
    Thanks
    17
    Thanked 73 Times in 57 Posts

    Re: 3800 series 1 oil pump

    Quote Originally Posted by riviera35 View Post
    well i replaced my oil pressure switch cause my oil pressure gauge was bouncing al the time and so then after i replaced it went down alot and so i checked my oil pressure and its suppose to be 40 to 80 psi and mine barely read it so i reved the car just to make sure it actually worked and it was about 8 psi
    Oil pumps don't usually wear out much. Usually if the oil pressure is low you usually have worn main bearings in the engine and the oil is just spraying out too fast and the pressure goes down. If the engine is making big knocking noises, either rebuild it or replace with a junkyard unit. If the engine makes no bad noises, ignore it and keep driving You may wish to check that the oil pressure overpressure valve isn't stuck open by taking it out and cleaning it. Watch for the big spring it's a PITA to put back.

    Also I am not sure if you did but check the pressure at the right spot with a mechanical gauge and also a rough rule of thumb is about 10 PSI per 1000 RPM when warm. If it idles warm at 8 I wouldn't worry - as long as there is some pressure. F14 has a good point about oil sludge clogging the pickup tube. I wouldn't think synthetic oil changes to necessarily mean it is not your problem, and removing the oil pan is a hell of a lot easier than the oil pump unless there is some kind of crossmember in the way.

    To me the main thing that would keep coming to my mind is that it's a 3800 Series I, just go get a new one from the scrap heap

  9. #8
    2.5L Iron Duke
    Join Date
    Oct 2011
    Posts
    18
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: 3800 series 1 oil pump

    ok well ill rip off the oil pan and check the oil pick up. but do u think a series 2 s/c would fit

  10. #9
    Chevrolet VOLT F14CRAZY's Avatar
    Join Date
    May 2006
    Location
    Dimondale, MI
    Posts
    10,031
    Thanks
    24
    Thanked 48 Times in 39 Posts

    Re: 3800 series 1 oil pump

    Quote Originally Posted by riviera35 View Post
    ok well ill rip off the oil pan and check the oil pick up. but do u think a series 2 s/c would fit
    it's "the same" engine, it'll bolt in. Your problems are controlling it and handling the power after it comes off the crankshaft
    '07 Subaru Forester 2.5X 5MT. Bought new. 164k miles. '05 Dodge Durango Limited Hemi AWD. Mom bought new. 90k miles. '74 Buick LeSabre Luxus convertible. 455/7.5L, Quadrajet, dual exhaust. '89 Buick Reatta. 3800 SII L67/F40 six speed swap to be completed someday.

    '87 BMW K75. Pichler V1 fairing. '87 Kawasaki 650SX. '85 Bayliner Capri 1952. 3.0L OMC. Restored. '71 Chris Craft Coho 33'. Twin 327QA's. Basketcase but restoration in progress. '70? Amphicat 6x6 AATV. 13 hp Honda swap.

  11. #10
    2.5L Iron Duke
    Join Date
    Oct 2011
    Posts
    18
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: 3800 series 1 oil pump

    so all i need is the the trans, computer and the wire harness. or do u think id be better off getting a car that got rear ended that has a series 2 s/c and use the parts if i need other parts i can use the parts out of that car

  12. Remove Advertisements
    GM Inside News
    Advertisements
     

Quick Reply Quick Reply

Register Now

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.


Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Powered by vBadvanced CMPS v4.1.2