meedom
Senior Member
So for anyone still interested, I tried installing a brand new RP 20-820 again on my 2016 5.7 using RLK’s suggestion of using some Scotch Brite on the gasket seat surface and had no issues with leaking at all. I really believe there was a problem with the gasket on the first one I tried, but the extra cleaning with the Scotch Brite certainly couldn’t hurt... I noticed that from gasket to gasket on these filters that they can vary in thickness and consistency of thickness across the gasket, maybe something to pay attention to when installing a 20-820 on a newer truck?? Anyway I found that the difference in outside diameter on the larger filter vs the smaller one is only a sixteenth of an inch....








