MS850 said:Just got the KW valve seals and installer, installer was $7.78, $12.76 for a pack of four.
Part# 20-20830, 71006
A pilot on the installer would be nice instead of having to use the valve stem
I know the std seals are lower tech, but if you get them on , in the groove and all of the trapped air out of them they are a real pig to remove, but they are very easy not to fit in that condition, or there is probably a lot of valve guides that they don't fit properly
I'm trying to install these seals, but the fit on the valve stem is really, really tight. Even with oil on the stem, when I tried to fit the first one, it tore the top of the seal off :-(I turned up my own installer out of billet alloy using Jim's measurements as a guide, in about 10 minutes. Lubed the seals and guides with assembly lube and they were a breeze to fit. Wont get them back off though without destroying them.
I'm trying to install these seals, but the fit on the valve stem is really, really tight. Even with oil on the stem, when I tried to fit the first one, it tore the top of the seal off :-(
Now I've 3 left, question is how to do? I see no mention of having to use a taper tool as a pilot to open up the seal.
It's easy enough to put in on te valve guide, but to get the valve stem through - that's another story....
Steve, out of interest, are you doing this in situ or with the head off?
Are they white or red seals Steve?Head off on the bench. I'm using Steve Maney's inlet valves, and they seen to have less chamfer of the top edge the the standard valves.
I found an extra Mick Hemmings seal (with the spring), so I've fitted that and put the Teflon ones back in the bag for now.
I did try warming then with a heat gun, did not seem to make much difference, Reading your post though, I suspect the trick is to ease them over the valve stem first, then onto the valve guide. Mind you, if I have fit then at a future date, I will probably make up a taper tool.
I was just a bit puzzled that no one else seemed to be having problems.
They are on page 216 of their online catalogue. They always supply me with plenty of them. JimNo, that is just what I measured using a cheap digital caliper. Chances are I bored it with a letter size bit.
It just needs to be a little larger than the spring on the top of the seal -after it is expanded over the valve stem.
Letter Z is .413" so it's not a letter drill. Probably turned it on the lathe. Since it's not critical, 15/32" is .469". The Norton products are located on pages 186 & 187 of the 2021 Kibblewhite digital catalog. The P/N 71006-4 valves seals are on page 300