Tech / General EngineIs your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Fel-Pro's level of quality for valve stem seals is always at least that of original equipment. Service life, not cost, dictates the materials required. Although seals made of premium materials, such as VITON® or polyacrylate, are much more expensive than seals made of nitrile, they represent but a small fraction of the total repair cost. Therefore, it just doesn't make good economic sense to sacrifice a long-lasting, successful repair to save on the cost of the valve stem seals. With Federal-Mogul's Fel-Pro valve stem seals, you'll do the job once, and do it right the first time.
The worst part is that.. we all knew jegs.com existed but only one recently had the motivation to pull the link lol. I'm currently replacing my valve seals, the intake and exhaust valve seals that were on my car look like this.
Ok I think I just found the answer to my problem. Near the botton of this article it explains how its safe to use the viton seals in place of factory nylon seals. They say that the vitons can hold up to heats of 450 degrees as the cylinder head often raises about 300 degrees. My valve stems must be oversized by a small bit because the fel-pro SS 72526 seals do not fit.
Originally posted by phess11 What engine do you have?
According to PartAmerica.com 72526 and 72527 should fit. I used 72527 on both intake and exhaust.
yea, your right, they "should" have fit. Its a stock 305 that came from an 89 RS Camaro, same L03 that was originally in the 89 bird. The engine was said to of been rebuilt by the dude who sold it to me. The intake/viton fit prefectly but the exhaust valve seals cracked no matter how lightly I put them on or with oil on the valve stem. I said screw it and put the 400 degree viton seals on intake and exhaust. On fel-pro's website they did have a car as an example of where they had to use viton on both intake and exhaust, it posed no problem since they can withstand high temps. If they give me anymore problems I'm going with my next upcoming solution that will fix many problems, the 350 swap.