Results 1 to 6 of 6

Thread: LBZ oil pressure

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Join Date
    Apr 2006
    Location
    Henderson NV
    Posts
    3

    Thumbs down LBZ oil pressure

    just picked up my new 07 duramax and driving it home I noticed that the oil pressure only got to 45 to 50 lbs. my 01 when new was at 80 and at 94K it still was at 60 at 2000 rpms. I'm worried that this is a major problem and should take the truck back before they send the paper work to DMV and tell them to give me another truck.

  2. #2
    Join Date
    Oct 2002
    Location
    USA
    Posts
    1,248

    Smile

    That pressure sounds about right for the LBZ. Mine only carries 30 at idle and 40 to 60 at cruise. Our 02 did carry 80 at high rpm and 60 cruising.
    There have been some post about this LBZ lower operating pressure.
    I wouldn't worry to much. Hope that helps.
    0000000

  3. #3
    Join Date
    Oct 2006
    Location
    Long Island, NY
    Posts
    5

    Default

    Same here, 40-50#

  4. #4
    Join Date
    Mar 2000
    Location
    Loyal WI US
    Posts
    10,792

    Default

    You should be just fine. Oil psi was either reduced OR the new databus reading (03+) became more reasonable/accurate.
    Kennedy Diesel-owner
    More than just a salesman-I use and test the products that I sell on a daily basis!
    Superflow Lie Detector in house
    2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
    2005 Chev K3500SRW D/A CC Long LT(SOLD)
    2007 Chev K2500 Classic EC Short LT (Sold)
    2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
    2016 GMC K3500SRW D/A CC short LTZ

    Custom tuning in house using EFI Live tuning software!

  5. #5

    Default

    I had the dealer test my oil pressure on my '05 LLY. Gauge read slightly low at idle, and they have a bulletin out that states 15+ PSI at idle is acceptable. My LB7s read much higher than the LLY.

    I think its all sender calibration and gauge accuracy myself.
    2011 Chevrolet Tahoe 5.3L daily driver
    • Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
    • Total GM diesel miles to date : ~950K

  6. #6
    Join Date
    Nov 2000
    Location
    foxboro,ma.
    Posts
    908

    Default

    Back in 2004 GM changed the spec on the oil pump , I think they did this to help the cavitation issues. My 2001 had around 70 psi warm going down the road, the 2004.5 lly truck has right around 50 psi warm goind down the road. the LLY truck and the LBZ truck once the motor is broke in they are both the same. A long time ago Grumpy Jenkins said GM motors only need 10~12 psi of oil pressure for every 1000 RPM they turn! so if he is corect 25 psi is about all you need at cruise speed.

    No Worries, RUN like some one else is paying for it!
    93 c-2500 6.5td,96 6.5td x cab,01 GMC lb7 Xcab ,2004 lly crew cab ,2006 lbz crew cab,honda CBR1100xx,2003 polaris prox 700 , 2001 31' holiday rambler 10K lbs house on wheels!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •