engine valve seals

[cuby]

How many of you mechanics put seals on your ex.valves along with the intake valves.

 

[Allan in NE]

Of course.

Allan

 

[Janicholson]

Every time, The engine makers today from ford to MB and Toyota do it to prevent coking and HC emissions and would never do it if it starved guides. Jim

 

[GregCO]

Every time.

Greg

 

[David G]

Every time

 

[jimg.allentown]

Me too, every time.
FYI, oil will run down the guides into the combustion area without seals. With today's overhead cams and roller tappets, and multi-valves per cylinder, there is a LOT of oil going into the upper head area. Not like an older engine with less valves, less moving hardware in the head, and as a result less oil moving in that area.

 

[dr sportster]

Somewhere I was reading about seals and it was found that during the overlap period there is a strong draw on the exhaust guide from exiting gases which draws oil if no seal is used. I probably read this on the Hastings site. Any oil kept out of the combustion chamber is a good thing.

 

[onetotaltoolman]

Ok - question . Just received a replacement valve package . valves, springs, guides, keepers, plus 8 "square" o-rings.
Where exactly do these o-rings go? I would assume the same thing you guys are talking about - preventing oil from transcending thru the valve guides. I'm just not exactly sure where these go.

 

[used red MN]

One..toolman, I suspect you are posting in Modern View. Due to the fact you replied to an old post you are not seeing a reply you received in Classic View asking you what engine you are working on. I believe after some time the 2 views may sync up and show all replies from both views. Since the information in the post you replied to has very little impact on your post other than identifying valve stem seals as the topic I would suggest you hit the ..new topic.. button at the top and recreate your own post and ask the question again and provide information about the ID of the engine. I would suggest you avoid replying to old posts going forward it will make the info from replies of posters in Classic View feed right into your post as normal. If you want to link an old post that you feel is relevant to the topic you are posting you can do that as follows. Find the post or whatever it is you want to post a link to. For this it is helpful if you know how to work multiple tabs in your browser. Once you have it open select and copy the entire web address from the address bar, it is the jumble that begins with https. Back in your post place your cursor in the reply window where you want the link to appear then click the oval button that says URL in it. Then paste the copied web address immediately after that with no space, then click the URL button again. This should provide viewers a live link to whatever you choose to link.
The moderators keep telling us the forum platform is going to change soon and all these 2 view debacles will go away.

As for your valve seals in the photo is an example of the installation of type of valve seals you seem to be describing. This photo is of a small block Chevy application.

 

[Hobo,NC]

Whut are you working on ? If a Ford N none are needed on the exhaust.

 

[onetotaltoolman]

(quoted from post at 12:07:05 05/14/23) One..toolman, I suspect you are posting in Modern View. Due to the fact you replied to an old post you are not seeing a reply you received in Classic View asking you what engine you are working on. I believe after some time the 2 views may sync up and show all replies from both views. Since the information in the post you replied to has very little impact on your post other than identifying valve stem seals as the topic I would suggest you hit the ..new topic.. button at the top and recreate your own post and ask the question again and provide information about the ID of the engine. I would suggest you avoid replying to old posts going forward it will make the info from replies of posters in Classic View feed right into your post as normal. If you want to link an old post that you feel is relevant to the topic you are posting you can do that as follows. Find the post or whatever it is you want to post a link to. For this it is helpful if you know how to work multiple tabs in your browser. Once you have it open select and copy the entire web address from the address bar, it is the jumble that begins with https. Back in your post place your cursor in the reply window where you want the link to appear then click the oval button that says URL in it. Then paste the copied web address immediately after that with no space, then click the URL button again. This should provide viewers a live link to whatever you choose to link.
The moderators keep telling us the forum platform is going to change soon and all these 2 view debacles will go away.

As for your valve seals in the photo is an example of the installation of type of valve seals you seem to be describing. This photo is of a small block Chevy application.

Thanks for the response. Rule #1 - never post on a site when you are in a hurry - i didn't even notice the post dates on this google search were years old. Appreciate the photo. Yes, that looks very similiar to an A/C valve design and this pic shows that little seal. Still don't know how it helps - oil being slung around can still hit the valve stem below the seal in the pic and travel down the valve guide. Things like this get under my tractor noodle until i can figure out what they are trying to accomplish. kp

 

[BarnyardEngineering]

(quoted from post at 13:42:40 05/15/23) Thanks for the response. Rule #1 - never post on a site when you are in a hurry - i didn't even notice the post dates on this google search were years old. Appreciate the photo. Yes, that looks very similiar to an A/C valve design and this pic shows that little seal. Still don't know how it helps - oil being slung around can still hit the valve stem below the seal in the pic and travel down the valve guide. Things like this get under my tractor noodle until i can figure out what they are trying to accomplish. kp

Actually, Rule #1 is don't ever reply to a thread with a "me too" regardless of how old the thread is. ALWAYS start a new thread. Saves on headaches, heartaches, human sacrifice, dog and cats sleeping together, mass hysteria... You know, the usual.

Rule #2 is never post on a site when you are in a hurry

 

[onetotaltoolman]

(quoted from post at 17:05:25 05/15/23)

(quoted from post at 13:42:40 05/15/23) Thanks for the response. Rule #1 - never post on a site when you are in a hurry - i didn't even notice the post dates on this google search were years old. Appreciate the photo. Yes, that looks very similiar to an A/C valve design and this pic shows that little seal. Still don't know how it helps - oil being slung around can still hit the valve stem below the seal in the pic and travel down the valve guide. Things like this get under my tractor noodle until i can figure out what they are trying to accomplish. kp

Actually, Rule #1 is don't ever reply to a thread with a "me too" regardless of how old the thread is. ALWAYS start a new thread. Saves on headaches, heartaches, human sacrifice, dog and cats sleeping together, mass hysteria... You know, the usual.

Rule #2 is never post on a site when you are in a hurry

i have "bookmarked " the rules . Hah!
BTW - thanks for the pic. i went to this company's web site. The pic you sent is pretty much a perfect copy of the seal/valve arrangement in the kit i purchased. Toyed with this install, and yes, putting the seal on the stem first followed by the keepers works perfectly when taking the pressure off of the valve compressor. Many thanks.

 

[used red MN]

Those separations between the two halves are not capable of holding much oil back. The rocker arm is slobbering oil on the tip of the valve continuously. The oring just deters the somewhat of a funnel of the center of the valve retainer from running oil right down the valve right onto the top of the guide.
It is really no fault of yours but just for giggles click Classic View at the top of the page. Go back a couple pages in Tractor Talk and look for the ..valve guide.. topics. You will then find out how scattered around your topic became in that view. You will probably see some replies that you did not post back in to Modern.