This is TikiWiki 1.9.7 -Sirius- © 2002–2006 by the Tiki community Sat 23 of Mar, 2019 [07:07 UTC]

Forum: Hot Heads Tech Talk

Forums->Hot Heads Tech Talk->392 exhaust valve stem seals

steve392
392 exhaust valve stem seals


I'm using positive valve stem seals on my intake valves, but unsure about the exhaust valves. Umbrella or no seal at all? I seem to remember that it's best not to run any seal on the exhaust valve, but not sure. What has everyone used on the exhaust side?
Steve
  user offline
on: Tue 12 of Feb, 2019 [17:39 UTC] reads: 965

Posted messages

Top
author message
DaveBlakeman
user offline
Re: 392 exhaust valve stem seals
on: Sun 24 of Feb, 2019 [17:26 UTC] score: 0.00
https://www.hastingsmfg.com/ServiceTips/valve_seals.htm Read up here on modern seal usage.

author message
George
user offline
Re: Re: 392 exhaust valve stem seals
on: Tue 26 of Feb, 2019 [16:15 UTC] score: 0.00
> https://www.hastingsmfg.com/ServiceTips/valve_seals.htm Read up here on modern seal usage.

Modern seals in modern engines, not necessarily relevant to an early hemi.

author message
DaveBlakeman
user offline
Re: Re: Re: 392 exhaust valve stem seals
on: Thu 28 of Feb, 2019 [15:38 UTC] score: 0.00
George you speak from rectum, Any oil not burnt means more power in any engine. Keep oil out of the chamber . The same physics applies to both . Your not thinking . If we still build engines like the 1950s we would be going backwards. I know you just throw out statement s and try to look smart . I'm not smart I read a lot.

author message
George
user offline
Re: Re: Re: Re: 392 exhaust valve stem seals
on: Thu 28 of Feb, 2019 [15:55 UTC] score: 0.00
> George you speak from rectum, Any oil not burnt means more power in any engine. Keep oil out of the chamber . The same physics applies to both . Your not thinking . If we still build engines like the 1950s we would be going backwards. I know you just throw out statement s and try to look smart . I'm not smart I read a lot.


"Steve: Many years ago, I let a machinist that I trusted talk me into exhaust seals for my hemi. The end result was a galled guide and a galled valve stem.
I'll never do that again. On our race engines we also drill a hole in the intake side of the exhaust guides close to the bottom for additional oiling.
I hope this helps, Bob"

So I guess you think Bob is talking out his a$$ also.....


author message
DaveBlakeman
user offline
Re: Re: Re: Re: Re: 392 exhaust valve stem seals
on: Thu 28 of Feb, 2019 [19:07 UTC] score: 0.00
Yes I do . Bob does not even know what clearance the machinist left him at. Have you ever even heard of a Winona insert ? Bob is basing all seal use on one thing that happened and does not KNOW THE CAUSE ! You make more power which is my goal . You guys do what you want . Your not smarter than some engineer at Hastings.

author message
Webmaster
user offline
Re: 392 exhaust valve stem seals
on: Wed 20 of Feb, 2019 [17:07 UTC] score: 0.00
Dave:
If you'll look in a full gasket set you will only find 8 valve seals. Dodge and DeSoto came from the factory with the side hole drilled in the exhaust guides only. Thank you for your interest, Bob



> I'm using positive valve stem seals on my intake valves, but unsure about the exhaust valves. Umbrella or no seal at all? I seem to remember that it's best not to run any seal on the exhaust valve, but not sure. What has everyone used on the exhaust side?
> Steve

author message
DaveBlakeman
user offline
Re: Re: 392 exhaust valve stem seals
on: Thu 21 of Feb, 2019 [18:54 UTC] score: 0.00
Oil is sucked down the ex. guides hard during overlap causing a rethinking of no exhaust seals. Perhaps you could use a Winona type spiral guide inert to oil the guides with seals This would allow min clearance with no galling of stem to guide. This ain't my first rodeo.

author message
DaveBlakeman
user offline
Re: 392 exhaust valve stem seals
on: Tue 19 of Feb, 2019 [17:41 UTC] score: 0.00
Webmaster - perhaps you needed more clearance and it was not caused by seals . Did you think about that ? Modern uses require exhaust seals.

author message
Webmaster
user offline
Re: 392 exhaust valve stem seals
on: Mon 18 of Feb, 2019 [16:36 UTC] score: 0.00
Steve: Many years ago, I let a machinist that I trusted talk me into exhaust seals for my hemi. The end result was a galled guide and a galled valve stem.
I'll never do that again. On our race engines we also drill a hole in the intake side of the exhaust guides close to the bottom for additional oiling.
I hope this helps, Bob




> I'm using positive valve stem seals on my intake valves, but unsure about the exhaust valves. Umbrella or no seal at all? I seem to remember that it's best not to run any seal on the exhaust valve, but not sure. What has everyone used on the exhaust side?
> Steve

author message
DaveBlakeman
user offline
Re: 392 exhaust valve stem seals
on: Sat 16 of Feb, 2019 [15:50 UTC] score: 0.00
You will make more power with seals on the exhaust guides . Seals are cheap !

author message
George
user offline
Re: 392 exhaust valve stem seals
on: Thu 14 of Feb, 2019 [16:32 UTC] score: 0.00
Normally none are used on the ex side.

author message
DaveBlakeman
user offline
Re: 392 exhaust valve stem seals
on: Wed 13 of Feb, 2019 [18:45 UTC] score: 0.00
I was reading {possibly on the Hastings Rings website] That it has been proven during overlap the oil is sucked hard by the exhaust guide therefor requiring seals on both intake and exhaust guides. Seals are cheap.


Page: 1/1

Show posts: