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I want to seal a leak in the cooling system of the 5K. It's at the
adapter for attaching the heater hose at the rear of the engine and is
sealed with an O-ring. I understand this is a common spot for leaks to
develop in the I-5 engine.
The parts fiche shows this O-ring with P/N 900 351 03 and describes it as
I'm not sure what this means but I suppose the N indicates the O-ring
material (neoprene?), 3 = thickness (mm) and 21 = diameter (inside?).
Can I replace this with an ordinary household plumbing neoprene O-ring?
What are the pros/cons of the gasket materials available in a tube?
Permatex Form-a-Gasket, LocTite Gasket Eliminator, GE RTV silicone, etc?
When are these acceptable alternatives and which ones are preferred?
Can these provide a seal equal to or better than the specified O-ring, or
There is quite an array available and I know they are very good products...
when properly used.
I don't like to have to make a special trip to the Audi dealer for a piddly
O-ring, but I don't want it to leak again either.
David Conner Columbus, OH
' 86 4KCSQ