Skonnie wrote:
> Hey all. Am almost halfway through installing a new water pump. Have
> unbolted the old pump, but am unable to pull it loose it loose from
> the metal return tube that attaches to the back of the pump. It seems
> really stuck, and if I didn't know any better, I would think it was
> welded on. Am i just not pulling hard enough? My Haynes manual only
> covers 740s until '88 and the Chilton manual I have is effing
> useless. The tube is not bolted on as shown in the Haynes manual, and
> has a flat bottom to it. It just won't budge. Its not welded on, is
> it? Any advice? Thanks to any and all who have pearls of wisdom for
> me.
>
> A
>


Did you remove the bolt clamping the pipe in? Beyond that it just pulls out.

"Skonnie" <iamthefritobandito@gmail.com> wrote in message
news:1174630190.676056.79760@l77g2000hsb.googlegro ups.com...
>
>> Did you remove the bolt clamping the pipe in? Beyond that it just pulls
>> out.
>
> Oh man, I wish it was just that. But yes, all bolts present and
> accounted for. I know it stretches the imagination, but the gasket on
> the tube has hardened, melted or aged to such a degree that it will
> not let the pump go. Not sure if I can soak anything overnight, as
> the pump is still very much attached to the heater tube, which is
> still attached to the car. Perhaps a careful and judicious
> application with a rag to catch any drips or spill might do it.
> Thanks all for the advice.
>
>
I don't feel my imagination all that stretched; I've seen a few really old
gaskets do that. I'd also like to think the gasket wasn't "sealed" with
something unwanted.

Perhaps a judicious application of a torch or dry ice to the pipe side of
the joint? I'm hoping the aluminum will expand or contract while the metal
of the pump does not (because it isn't heating or cooling) and the bond will
shear. I've never tried that, though; the times I've come across it the
pieces were in a place I could use a plastic mallet on the side of the loose
piece to crack it.

Don't bother trying to get a chisel in the edge; it chews up the metal and
doesn't really convince the gasket to let go.

Mike

Skonnie wrote:
>>Did you remove the bolt clamping the pipe in? Beyond that it just pulls out.
>
>
> Oh man, I wish it was just that. But yes, all bolts present and
> accounted for. I know it stretches the imagination, but the gasket on
> the tube has hardened, melted or aged to such a degree that it will
> not let the pump go. Not sure if I can soak anything overnight, as
> the pump is still very much attached to the heater tube, which is
> still attached to the car. Perhaps a careful and judicious
> application with a rag to catch any drips or spill might do it.
> Thanks all for the advice.
>


Remove the whole tube and work with it on the bench. It goes around the
back of the head and attaches to the heater hose.

Skonnie wrote:
>>Remove the whole tube and work with it on the bench. It goes around the
>>back of the head and attaches to the heater hose.
>
>
> Shizit, I was hoping to avoid that. I don't trust myself to remove
> the exhaust manifold and the turbo. Or rather I don't trust myself to
> put it back together correctly. PB Blaster has not worked. A block
> of wood and a rubber mallet hasn't either. I fear I'm off to seek
> (and pay for) professional help unless there's a magical 8th solution
> to all this. Thanks for all the advice.
>


You shouldn't have to, IIRC it will come out from behind the manifold
without removal, you may have to remove the bracket holding the bottom
of the turbo though. Also you might try heating up the water pump until
the rubber seal melts, I'm not sure how it could hold it on so tight
though, you're *sure* you didn't miss a bolt?