[Gmecm] Hard to fix oil leaks from around a 1988 2.8L oilpumpdrive gear

[David Allen]

  Yes, it is hard to find!  If you don't have good luck with the dealer, an
industrial supply house will have it.  I had the same problem on my 2.8.
The final solution was a square "lathe cut" Viton o-ring from the industrial
house.
  The lifter oil gallery on this block is cut through to the distributor
hole and there is pressurized oil at this location.  It can leak profusely
here!
  Good luck,
David

----- Original Message ----- 
From: "Dustin Lof" <bubblesjrtwo at yahoo.com>
To: <gmecm at diy-efi.org>
Sent: Monday, December 26, 2005 7:36 AM
Subject: Re: [Gmecm] Hard to fix oil leaks from around a 1988 2.8L
oilpumpdrive gear


> that o-ring is hard to find, if you cant get to a
> dealer find an o-ring that is close and use a small
> amount of rtv.  Inorder for the rtv to seal proper,
> both surfaces must be very clean and dry, use brake
> clean and a clean shop rag and scrub the metal until
> it is shiny and very dry.  Carb spray may work better
> to get the surfaces clean but you need to follow with
> brake clean or something that doesent leave a residue
> when it dries, and leave the blue rtv in the store,
> orange red or black works best in minimal amounts
>
> --- Scott Feaver <sfeaver at magma.ca> wrote:
>
> > Last time I had to fix that I got the o-ring from
> > the dealer, as well as a
> > flat gasket for the top.   Put both in (I dont think
> > I used RTV on the
> > O-ring either) and hasnt leaked since..
> >
> >
> > ----- Original Message ----- 
> > From: "Ron Drew" <rjdrew at adelphia.net>
> > To: <gmecm at diy-efi.org>
> > Sent: Monday, December 26, 2005 8:25 AM
> > Subject: [Gmecm] Hard to fix oil leaks from around a
> > 1988 2.8L oil pumpdrive
> > gear
> >
> >
> > > I apologize for asking a non-ecm specific
> > question. Does anyone know how
> > to
> > > best fix a large volume oil leak from around the
> > oil pump drive gear on a
> > > 1988 2.8L. I've tried a new O-Ring with some RTV.
> > It seems to leak only
> > when
> > > the engine gets below 35 degreed F, once it's warm
> > the o-ring seems to
> > seal
> > > fine. However when it's cold the volume is enough
> > that I must fix it. I
> > was
> > > wondering if anyone else has struggled with this
> > and could recommend a
> > > solution that worked for them.
> > >
> > > Thanks
> > > Ron
> > >
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