Re: Crank seal surface repair

[Kevin Trent <trentkc@domain.elided>]

At 04:24 PM 1/30/03 +0000, you wrote:

> <snip>
> Which brings me to my question. On a crank, there is the surface where
> the rear oil seal contacts. Sometimes, there is a groove worn in that
> surface, assumably from dirt and the rear seal grinding away.
>
> How deep of a groove before it becomes a problem?
>
> And, how repairable is this condition?
I have repaired such flaws with a carefully applied and finished fill of JB 
Weld epoxy.
Get the repair surface clean with degreasing solvents, apply the JB Weld 
with a precision  flat (raszor blade).  After curing, finish repair with 
very fine wet sand emery paper 400+.  Use small amounts and multiple 
iterations, just fill the imperfection, not the surround.  I also use JB 
Weld to secure mucked up stud mount threads, fill mating surface  pits or 
scars on all kinds of joints, pitting at the block-piston liner joint, and 
pitting in hydraulic cylinders.  JB weld is very hard, heat resistant, and 
chemical resistant, and bonds well with metal.  The key is proper surface 
clean & prep.

//kct, Powell, TN
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