Water pump flange o-ring leaks

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bokuglen - 17 Dec 2004 02:37 GMT

I recently did a timing belt replacement, and did the water pump at the
same time. Everything worked fine, but after about 10 miles, the water
pump flange o-ring started leaking like crazy.

I thought it was on ok when I pushed the flange on, but now I can see
it is hanging out of the groove a bit. Now I have to tear down the
whole thing and start over.

Anybody know how I can prevent this from re-occuring? Do I need to
lubricate it before pushing it on.????

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Eric Baber - 17 Dec 2004 08:26 GMT

The same thing happened to me (or rather my mechanic) - he put in a new
water pump and it was leaking by the time I got it home. It transpired that
the o-ring that came with the pump was just too soft, and that when
tightening the bolts to put on the pump, the ring just squished and didn't
seal properly.

My mechanic took it off again and replaced the o-ring with one of his own,
and that solved the problem. Seems this is a design/construction flaw on the
rings that come with the pumps.

Eric

> I recently did a timing belt replacement, and did the water pump at the
> same time. Everything worked fine, but after about 10 miles, the water
[quoted text clipped - 6 lines]
> Anybody know how I can prevent this from re-occuring? Do I need to
> lubricate it before pushing it on.????

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bokuglen - 31 Dec 2004 01:23 GMT

I was able to remove the o-ring without taking out the timing belt &
water pump. I just removed the P/S pump, air box and right fan. Then
I could remove the two inlet flange bolts and pull the flange forward.
The old o-ring was really torn up. I replaced it with an o-ring from
the autoparts store which looked the same. I was sure to lube the ring
with antifreeze first and press the flange back on while watching
alignment.
Started it up and all is ok now.

Thanks.

> The same thing happened to me (or rather my mechanic) - he put in a new
> water pump and it was leaking by the time I got it home. It transpired that
[quoted text clipped - 18 lines]
> > Anybody know how I can prevent this from re-occuring? Do I need to
> > lubricate it before pushing it on.????

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