Post by lockdoc on Apr 29, 2007, 2:25am
Just figured I'd throw this out there if anybody but me didn't know. While installing new pushrods, tappet guides, etc., I installed a new set of blue silicone pushrod seals. VERY bad product. As soon as the engine warmed up oil started to spurt from the lower seals. As I lifted the covers to see what was up I noticed the seals were IN the tube. The silicone gets extremely soft and slides right up. Needless to say I was pissed.
On the bottom of this page are the ones I used.
http://www.jpcycles.com/catalog/2007Har ... /0571.html
Post by Skip on Apr 30, 2007, 2:53pm
Post by fourthgear on Apr 30, 2007, 5:11pm
I replaced my cork seals with the same ones you show and they work fine on mine . The reason I changed them is because I had an oil leak on my top intake push rod tube and that sucker was a hard one to find until I re adj. my push rods the last time and the small leak turned into a big one that strangely enough did not leak much oil on the gear case side of the motor ,but did wrap around the front of the motor and look like I had a pan cover leaking on the front cyl.. The reason I used the blue ones is ,I was out of corks and the one that was leaking was like a piece of card board and of course couldn't use it again ( have my 65 apart and the blue ones were there to use , so I did and no leaks yet , have about 1200 miles since changing them . This is partly ( all ) my fault because of how many times I pulled the tubes off to adj. my solid lifters with out changing the cork seals , I normally change them every other adjustment because I know the cork seals have a tendency to harden up with time and that would be OK if they were not solids that have to disturbed for adj. , hyd. would not have to be played with. Maybe there are diff. manufacturers or you got a bad set . I know a lot of people who use them and not have problems, hard to tell . There are other types out there and I think they are better in some ways than cork.
Post by caschnd1 on Apr 30, 2007, 11:28pm
I use 3 different types of seals. I use cork at the top where the tube meets the head. The blue silicone seals could not take the heat here and cork works great. I use the blue slicone seals in the middle of the pushrod tube. I use o-rings at the base of the pushrod tubes. I use o-rings here because I have Evo-type lifter blocks and they are designed for o-rings.
Post by lockdoc on May 1, 2007, 2:42am
I don't know what the problem was but they were definitely "mushy" and I have spankin' new tappet guides that have nice surfaces. In order to take it's maiden ride I had to dig in the garbage for the old black rubber seals which are working fine for now. The blue is still in the middle and top until a new set comes in. Maybe I need new covers or springs? I was going to use cork but I new I'd be popping the covers often with the new solid lifter conversion.
Post by fourthgear on May 2, 2007, 1:34pm
Do you have the washer under and between the spring and the middle seal? Just a thought .
Post by mtnspan on May 2, 2007, 9:24pm
I'm with Skip, CORK! I've tried the blue silcone seals twice and both times they leaked. I should have learned my lesson the first time but I'm stubborn because I've read good things about them. But they don't work for me so it's cork from now on. I rub a little white grease on them when installing, seams to keep them soft longer.
Post by lockdoc on May 6, 2007, 4:47am
From the bottom up on the upper tube I have the seal, washer, spring, retainer.''fourthgear wrote:
Do you have the washer under and between the spring and the middle seal? Just a thought .''
Post by chucklbones on May 7, 2007, 1:55pm
het now been using blue ones on both my bikes 82 chulb and 56 pan no problems