Spring loaded pushrod tubes.

[richierich]

[QRP]

[slalombuggy]

Now that I know about this valve shim mod I'm going to use it on my Scat tubes. Thanks. BTW the Scat tubes I have, use 3 internal o-rings and are good to clear .610 lift out of the box, something i had troubles doing with stock style tubes

brad

[Supercompdad]

I just removed a set of which 7 were leaking bad. The PO tried using silicone in the tubes to seal them. There were plugs of it going back and forth on the pushrods.
He obviously lost the instructions, if I had seen this sooner I might have tried to use them. lol.

[Lsdeep]

for what it is worth (and i know it will change nobodies mindset about it). i used windage type widemouth tubes when putting my engine back together some month ago. within weeks a couple started to leak (just a little, but they leaked). switched over to scat spring loaded at that point, have to admit main reason at the time was that i really was fed up with the idea to losen up the heads/ leave alone taking them off. so far so good - they work fine and no noticeable leak yet (daily driver, in for about 2mth). will they leak at some point? possibly yes. but i really don't get the spring loaded tube bashing in general.

cheers, L
_________________
If one does not fail at times, then one has not challenged himself.

[nextgen]

One thing that I learned years ago, in the 60s and 70s when everyone just drove their bugs till the engine blow, was from the East Coast Empi Guys in the Bronx.

Polish the seal seating area in the head and in the block till they shine.

That goes for every push-rod tube we spoke about.

Only later did the seals improve. Then it was the original or junk.
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