Quote:
Originally Posted by Piotrsko
Ok other than filling up small passages like blood clots in a stroke, exactly what damage do you observe on a stop leak treated engine?
Dont spare the miniscule details.
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I don't know about "damage," but what the products sales pitch does not tell us (but we should be able to guess) is that it affects both the leaking seal and the perfectly fine seals. So, a few years ago I tried to treat my persistent oil leak problem with Stop Leak. It worked for a about 6,000 miles. Then leaking returned. Much later, doing some valve settings, I also needed to replace some oil seals, one on a valve cover bolt and one for a spark plug. I noticed all four spark plug seals had a gummy surface quality and scaped with a screwdriiver pretty easily. That expansion is what the product is designed to do to oil seals throughout the engine. Just an observation. The seals were not leaking. I have had no special problems of any kind that I thought attributable to the Stop Leak.