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Discussion Starter #1
So...what 2.2/2.5 valve stem seal do you prefer and why?

My context is with a Beehive spring update, maybe also with PT lifter update, what valve stem seal would you choose and why?

Factory/aftermarket/Viton/Hemi?
 

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with the hellcat and demon engines you might want to look up if there was / is a valve seal upgrade
and cross reference it for fit in a new standard hemi like the recommended hemi seals

if so that would get an upgraded hemi seal for a motor that probably runs hotter

(?somthin to check?)
 

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the stock ones are
Umbrella style . and do like to dry rot and even POP OFF


you can get some that have little spring locks on them.
sometimes called fixed style. they are nice..



The ones i went with I am not sure of the name.
I have been called them "spring captured" valve stem seals.
I told my machinist to use " late model hemi" valve stem seals. and this is what i got.





25 years of engine design later, this is what LS engines use and hemi engines use..

You can see them on my head in these pics.

 

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interesting

I like the combination metal spring seat / valve stem seal idea

any chance you might have a link for those ?

I'd presume the metal shell must be steel or it would probably get chewed up pretty fast
 

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most likely steel.
no part number known.
I literally said to my machine shop
" please use the late model hemi seals that sit under the spring"
They didnt ask me any other questions. and seemed to know what those were.
Looks like there are aftermarket ones available for this engine. I have the green ones.
https://www.ebay.com/sch/i.html?_odkw=hemi+valve+stem+seals&_osacat=0&_from=R40&_trksid=m570.l1313&_nkw=5.7+dodge+valve+stem+seals&_sacat=0

mopar part number for 05 magnum hemi. 53021578AA < all.

08 challenger 6.1 53021578AA < exhaust. 5037798AA < intake.
 

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Also FYI. main reason I did this. My 782 head that came on this van had dropped to valve guides down some.
Making the valve stem seals not want to seat properly on the smaller amount of guide sticking up.
It smoked alot.
782 are pretty well know to drop guides.
I put in FWD performance locking exhaust guides.
But wanted the added insurance of the "captured" style stem seal.
 

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thanks for posting these , and the ebay link

.. guides , lol yeah I even went one step further than just buying the locking guides
- I bought both std and os locking guides
lol - so I don't end up with an attempt but wrong part situation when I build the head
 

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Discussion Starter #9
The hemi seals I have been hearing and reading about and the info and pics above are great value to this post. I wonder if the captured style with the thin flange that sits under the spring is of any consideration in spring height or pressure when assembled. I think that it is acting a bit like a shim...so I wonder and just thought I might ask since I am sure one or more of our more curious members might ask to resolve any question or doubt they might have regarding real world applications and final head assembly.

 

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from previous posts and beehive threads i told them to set mine to 90PSI seat pressure for the regular 3.3 springs.
it required 50-60 thou in shims. these guides are about .20 . with STOCK cams you are no where near binding. i think stock regular spring pressure was 110-120?
I am sure the comp cam LS1 springs are going to have even more room before bind due to their design. and even more spring pressure with less shim.
Might be a good idea to get the LS!'s in and check for seat pressure at 1.58 to 1.65 the installed height is going to change based on number of valve jobs.
 

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Not to hijack the topic but for those of you who ran the Mopar Performance P4349121 special heavy duty Viton valve seals for the 2.2 what did you think of them?
 

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I built mine at home.

I used 2 stock shims per spring, GM 3100 retainers, stock keepers, 3.3L springs, and LS1 valve seals. I bought HEMI ones but couldn't figure out how to install them. Seems to run just fine and doesn't smoke, so that's good.
 

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Not to hijack the topic but for those of you who ran the Mopar Performance P4349121 special heavy duty Viton valve seals for the 2.2 what did you think of them?
I think minimopar has not been updated since 2003.
I think the dodge garage's info hasnt been updated since about 1999.

I think viton is a brand name.
I dont think you could get valve stem seals in 2017 that were not viton.
I think there are much better options with minimal research or price difference.
 
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