I attempting to replace the famous O rings in the drain valve and have a question. The new O rings seems to be too large to fit the recess diameter in the valve. The old ones measure .487 (just under a 1/2") and fit nicely. But I can not press in the new ones using finger pressure. The new rings match the spec's I found on the grainger and mcmaster-carr website, measuring at .512 on the outside diameter..(the valve measures .484 inside the recess diameter.) I am surprised they are so hard and not pliable like the factory o rings.. Don't see how to make them work without pressing them in with my bench vise, which does not sound normal to me. Help

 

I rember mine going in easy no extra force needed to get them in
I used Springer pop link for the o rings but i think is was the mcmaster-carr website
Keith

 

Look at Alan's Help Network website. He has a new chart for common o-rings, with sizes and part numbers.

Pop

 

Fuel Drain Valve Viton 1/8" 1/4" 1/2" McMaster-Carr 9464K118 25/$5.46 202

http://www.7point3.com/OringChart.aspx

 

I recently went to Graingers and bought Viton o-rings for my water seperator on my 99.5. They were 25-rings for $5.17. They fit perfectly. It's been several weeks and all is fine, no more leaks. Others places I checked wanted 10-times the price. I dont have the numbers handy but it on another of my posts.

 

Graingers 1BYU7 They went in alot easier then the old ones came out. Slight finger pressure for me.

 

I got mine from a friend who got them from McMaster-Carr.. They are -202 p/n, white in color and hard as a rock & not pliable. I will drive down to Graingers which is only 9 miles away and get theirs. I wondering if my valve housing is undersized for some reason. These o rings are suppose to be pretty standand in size, but noticed on the internet they do come both in "hard" and "medium hard". Thanks for the info..guys

 

Mine are black and softer than the ones I replaced. They were dried out, I have 23 left over. I cant use them. give me a email.

Joe