Hi,

I have some questions on installing new Valve Seals. I have installed the O ring type seals in the second groove on the valve. The problem I have is when I put the top part on the spring and compress to put the collet back on the seal is pushed out of its groove. I have attached a picture. Am I doing this right. I can't see any other way to do this.

Also on the manual it says to install the larger seal which I have in my hand on the intake valve. But when I dissassembled the head these were on the larger valve which is the exhaust. Is the manual wrong or have someone previously installed the seals on the wrong valve.

Thanks.

 

The larger valve is the intake.

The O-rings are useless, better is to forget about them entirely and use positive seals like the one in your hand on all the valves.

 

Okay. the larger valve the intake. Why were the positive seals only used on the intake. You would imagine that it would have to be burning oil.

Thanks.

 

The purpose of the O-ring is to keep oil from collecting on top of the retainer and running down the valve stem. That's why they're so useless.... they basically don't do much of anything. The way you're supposed to put them on is, put the retainer on first and push it down way far, then put the O-ring in that groove, then let the retainer back up a bit, then put the keepers in, then take the spring comp off. The O-ring seals between the retainer and the valve stem.

The exh valves don't have vacuum on the other side of the guide like the intakes do, so nowhere near as much oil can possibly go that way. Besides, they get MUCH hotter, and seals don't last so well over there, unless you use Teflon ones (which don't fit stock heads until machine work has been done to them). But if you want you can put a set of the same seals on them.

No telling why somebody put seals on the exh and not the int... after all these years stuck on this planet out here in the boonies of the galaxy, one thing I've learned is, there's NO ACCOUNTING for the stupidity of the supposedly dominant species on it, these "humans" crawling all over it. Every time I think I've already seen the STUPIDEST POSSIBLE thing that can possibly be done by one of them, another one comes along and proves me wrong. Never understimate the ability of HUMANS to do STUPID things. So don't even bother asking "why" some stupid HUMAN botched something; the short answer would be, because they're HUMAN, and can't do any better.

 

I understand now. Thanks.