GM water pump

[Martin Powlette]

Good point Don I did notice some wear and heat color on the ceramic seal as well
as the mating copper like part which was all worn out.  They resemble two slip
rings.  Is that where the sealing takes place??
I guess the plug at the top with the 3/8 drive goes last after all the air goes
out.
One other thing we use coolant rather antifreeze down here and maybe, just maybe
there is no lubrication from the coolant. Ethelyne glycol does doesn't it ??

Martin


Don.F.Broadus at ucm.com wrote:

> I have read that it is easy to crack the ceramic seal in these pump if the
> fill isn't correct. If you have air pockets or start the vehicle before you
> add water the seal could crack due to heat and cause your leaking problem.
>
>         -----Original Message-----
>         From:   Martin Powlette [SMTP:marquise at candw.lc]
>         Sent:   Monday, October 05, 1998 1:17 PM
>         To:     diy_efi at efi332.eng.ohio-state.edu; toyota-mods at cyberauto.com
>         Subject:        GM water pump
>
>         NON GROUP CONTENT
>         I posted a message on a water pump problem I had been having with a
>         small block V8 engine.  The engine had gone through about 3 pumps in
> one
>         9 months and now with my own experience 2 pumps in three weeks the
> last
>         started leaking in 2 days.  The last 2 pumps were genuine AC Delco.
> The
>         pump leaks through the hole in the bottom.  There was a bit of
>         eccentricity after the first pump that I corrected with a new hub
> and
>         fan clutch, the fan seems balanced. I was really dissapointed in the
>         feed back from you guys the last time so you V8 guys please chip in.
>         The one observation I made is that the intake manifold was once
> removed
>         could a badly installed intake gasket be the problem??. The gasket
>         according to Haynes Manual has a block on the rear coolant passages,
>         what if it was removed or placed to the front passage instead???
>         We can't always get Toyotas to work on every day. Please help.
>
>         Martin