<VV> REAR HOUSING OIL LEAK REPAIR and wheel leak repair
larry at forman.net
Mon Dec 13 22:11:11 EST 2010
When I started getting involved in Corvairs, Mike Peters, who sold a lot
of Corvair parts and gave away advice, told me of a Corvair guy who had
a pesky and persistent problem with his bell housing leaking oil.
After trying several attempts to solve it, he finally used epoxy paint
on the inside of the bell housing to seal it up. The problem was
apparently micro-cracks in the aluminum casting that were not
obvious. So I started painting the insides of my bell housings with
POR-15 as a preventative for that little problem.
I was also asked how I sealed the aluminum wheel from leaking down.
For my problem, this was on a Hands Wheel, so I really did not want to
replace or scrap it. I was fortunate that the tire dealer was able to
isolate the problem to the approximate area of the wheel where the air
leak was originating. Once this was known and marked, I was able to go
to the inside surface (tire off, of course) and prep and paint that
area. I suppose, if you suspect porous castings, you could use POR-15
on the entire inside of the aluminum wheel to seal it up "forever".
The paint weight is negligible and if you paint the entire inside there
should be minimal effect on the balance.
The tire dealer found the leak by using a traditional water tank
immersion. Another approach available today would be to use an
ultrasonic leak detector. These are frequency band "translators" that
shift the ultrasonic frequency band down into the audible frequency
band. These are darn handy little devices, but are typically over $100
on ebay. They are usable for finding leaks in LPG systems (like for
Ultravans), refrigerant leaks, and more.
If your leak is at the tire to wheel interface, then once you find the
leak (which might be due to a surface imperfection) smooth or correct
that surface. Sounds like a job for JB Weld or a file and sand paper.
On 12/13/2010 3:09 PM, shortle wrote:
> How and where do you apply it on a Corvair bell housing?
> Timothy Shortle in Durango Colorado
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