Continuously Leaking Water Pump on 740 GL

  • Thread starter Thread starter jimmy
  • Start date Start date
J

jimmy

Hi all,
Well I put on a new waterpump last year after noticing it was leaking
when I bought
my 1990 740 GL wagon. After a few months I noticed it was leaking
again. Took it
to a Volvo mechanic (in fact, ONLY works on Volvos) and he repaired
it. Looked good
and tight. Drove maybe six months and now I see it is leaking
again!! What gives?
Is their some type of factory design flaw here or what? Thanks for
any help/advive.
jimmy
 
Where is it / was it leaking from?

Same spot each time?
Click to expand...

Yes, it seems to leak from where the top gasket fits on (you
know, where they tell you to "put a lot of pressure on" when
tightening it up or it will leak ;-) I can see where I might have
not tightened it properly, but I can't believe my mechanic (who
is a guru, and many other folks agree so) can't get it either...
Btw, I moved 5 states away or I would just take it back to
him again and let him give it another shot. Anyone know of
a good Volvo mechanic in Rochester, MN?
thanks,
jimmy
 
Where is it / was it leaking from?

Same spot each time?
Click to expand...

Yes, it seems to leak from where the top gasket fits on (you
know, where they tell you to "put a lot of pressure on" when
tightening it up or it will leak ;-) I can see where I might have
not tightened it properly, but I can't believe my mechanic (who
is a guru, and many other folks agree so) can't get it either...
Btw, I moved 5 states away or I would just take it back to
him again and let him give it another shot. Anyone know of
a good Volvo mechanic in Rochester, MN?
thanks,
jimmy





I smear a light coat of silicone calk on the rubber before installing the
pump, never had one leak.
 
James said:
Yes, it seems to leak from where the top gasket fits on (you
know, where they tell you to "put a lot of pressure on" when
tightening it up or it will leak ;-) I can see where I might have
not tightened it properly, but I can't believe my mechanic (who
is a guru, and many other folks agree so) can't get it either...
Btw, I moved 5 states away or I would just take it back to
him again and let him give it another shot. Anyone know of
a good Volvo mechanic in Rochester, MN?
thanks,
jimmy
Click to expand...

Perhaps there is some corrosion on the mating surface for that upper
o-ring? Another possibility is that the o-ring installed wasn't of the
best quality. Was this a Hepu, Volvo or some other top quality water
pump? They are not all equivalent.

John
 
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