Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Rear main seal leaking?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 90K5, Sep 27, 2001.

  1. 90K5

    90K5 1/2 ton status

    Joined:
    Jun 1, 2000
    Posts:
    3,719
    Likes Received:
    0
    Location:
    Lubbock, TX
    Changed my oil today, and noticed the bellhousing, starter and a lot of stuff in that are was covered with oil...would a leaking rear main seal cause this? The tranny shop replaceed that seal when I got the tranny rebuilt...so it looks like they might do it again.....

    90K5
     
  2. DesertDueler

    DesertDueler 1/2 ton status

    Joined:
    May 23, 2001
    Posts:
    3,106
    Likes Received:
    0
    Location:
    Phoenix, AZ
    I would either be the valve cover gaskets, back of the intake or the rear main seal. Look at the beack of the valve covers and see if they are leeking there. It will make it apear that its leaking from the rear main seal.

    86Jimmy 4"&35"MTRs,87 burb 4"&35"MT,69Firebird w/525 hp,and 70GTO live in PHX,AZ<a target="_blank" href=http://www.geocities.com/modifierperformance>My vehicles</a>
     
  3. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    I had oil in that area on my S-Jimmy. Turned out that one of the lines to the oil cooler had a slow leak. You'll have to get under there are look really closely to find the true source of the leak.



    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  4. Stoopalini

    Stoopalini 1/2 ton status

    Joined:
    Oct 17, 2000
    Posts:
    999
    Likes Received:
    0
    Location:
    Austin, Texas
    my starter got covered with oil and it turned out to be the pan gasket and the oil dip stick tube.

    I took the dip stick tube out, cleaned up the block hole, gooped some Black sealant on it, and stuck it back in. Replaced the pan gasket (and did the rear main at the same time because it is a 2 piece --- easy to replace with the pan off) and my oil problems went away.

    Also, the valve covers are a good thing to check. A lot of times the back of them will leak down the side of the block.

    Good luck,

    Thomas

    -- '84 K5 Blazer --
    <a target="_blank" href=http://stoopalini.off-road.ws/blazer>My Blazer Site</a>
     

Share This Page