Valve seal question

[Blue88Coupe]

I've never seen this "O-ring" looking valve seal before, is there any benefit to running this seal vs the one that cups onto the guide? I dont even know if this is a valve seal really, if its not the valve seal what is it?

[Skidonenko]

http://lmgtfy.com/?q=o+ring+valve+seals

I would not use them on something I was building. My best guess is they stay at the point of max lift and only allow a bit of oil to lube the valve, Old style/rudimentary design? Ive honestly have not seen them on anything, including my 61 falcon. Use so some good "umbrella" ones and do them once.

oring pros=dirt ass cheap
cons=dont seal much of anything

viton vs teflon= another argument

[greenbullitt]

theyre used under umbrella seals, not needed with Viton seals

[Skidonenko]

theyre used under umbrella seals, not needed with Viton seals

Under those cheap looking rubber caps? If so that is why I have not seen them before (guess i'm to young )

[jyro]

That rubber ring is a stock type valve seal used in most cars and trucks from the mid 80's back. they may still be used for all I know. The only advantage is they allow some lube to the valve guides.

[greenbullitt]

Under those cheap looking rubber caps? If so that is why I have not seen them before (guess i'm to young )

lol

I spent a lot of early years in a machine shop. I was pulling lifters out of core blocks at 8 years old lol. I saw a lot of shit and I guess I have a very photographic memory

[Blue88Coupe]

lol

I spent a lot of early years in a machine shop. I was pulling lifters out of core blocks at 8 years old lol. I saw a lot of shit and I guess I have a very photographic memory

another thing about these heads is that some of the tops of the valve guides are chamfered and some are flat top, if i go with a regular seal is that gonna cause any issues?

[greenbullitt]

another thing about these heads is that some of the tops of the valve guides are chamfered and some are flat top, if i go with a regular seal is that gonna cause any issues?

no, they clamp the guide much lower, should be just fine

[Blue88Coupe]

no, they clamp the guide much lower, should be just fine

Thanks! I just sent you a PM regarding a gear swap im doing

[greenbullitt]

replied

[Ed Curtis]

That small "O-ring" is used on the old Chevy valves with two grooves at the keeper side. The lower groove is for that seal whereas the top groove was for the keeper.



It is not designed for use where you show it. They were used by GM to seal up the gap at the mating areas of the stem keeper and valve lock. What was used to control oil was a long stamped steel "umbrella" between the retainer and spring to limit the oil spraying onto the guides.



Bottom line - remove those from your heads and look for a true guide gripping valve seal.

[00pooterSS]

That small "O-ring" is used on the old Chevy valves with two grooves at the keeper side. The lower groove is for that seal whereas the top groove was for the keeper.



It is not designed for use where you show it. They were used by GM to seal up the gap at the mating areas of the stem keeper and valve lock. What was used to control oil was a long stamped steel "umbrella" between the retainer and spring to limit the oil spraying onto the guides.



Bottom line - remove those from your heads and look for a true guide gripping valve seal.

Whoa whoa... slow down, first posts are not allowed to be intelligent and descriptive... Where's the tits or gtfo police? You guys are slacking!

[Blue88Coupe]

Whoa whoa... slow down, first posts are not allowed to be intelligent and descriptive... Where's the tits or gtfo police? You guys are slacking!

We dont do that bullshit in the garage. Its reserved for the backporch!

[00pooterSS]

We dont do that bullshit in the garage. Its reserved for the backporch!

I see. Duly noted.

[Snatch Napkin]

Is that THE Ed Curtis?