[DMCForum] Those darn y-pipe o-rings
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[DMCForum] Those darn y-pipe o-rings


I'm new here and although i do not have a DeLorean, I do have a Volvo
760 with the B280F engine.

I am hoping to find the solution to a coolant related problem I am
having. This is with the y-pipe that runs from the water pump to the
back of the engine block. Connected to the waterpump by the rubber
hose (short in length, large in diameter) and to the block with a
flange sealed (or was once sealed) with o-rings.

My problem is that one of these failed was 'repaired', however it
still seeps a small amount of coolant, typically after the engine is
cold but when there is still pressure in the system. I replaced these
o-rings (again) and used a modest amount of gasket sealer torqueing
the bolts to 15ft-lbs (11n-m).

I found my way here from an earlier post, "That darn water return
pipe" from last year. Some of the gallery photos showing coolant
inbetween the heads has been most helpful and very familiar.

My temptation is to crank these bolts down a bit more but don't want
to risk stripping the threads. Then i would have real problems.

Does anyone have an idea as to what torque should be used for these
bolts? Or have anyother ideas for sealing this thing up?

Many thanks in advance and sorry for the longish post.


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