Another option for valve seals. :O)

[turbovanman²]

I forgot this but doing some work on the head and remembered, valve seals off a 1995 Tbird 4.6 work perfectly and are dirt cheap. Best part is, they are the hat design so the valve spring keeps them in place.

[1st_Turbo_Car]

nice to know for a noob like me. i have found another r/t that is not too aweful far from me, that has been sitting for a while and looks like it may have had many pieces robbed from it. I am going to attempt to acquire this during tax season and start tearing it down and use for spare parts. and of course a spare engine to rebuild and have waiting.

[rich tideswell]

these? sealed power ST2140
OEM Part Number(s): F4AZ6571A, F6AZ6571AA

http://www.rockauto.com/getimage/getimage.php?imagekey=216369&imageurl=http%3A%2F%2Fwww.rockauto.com%2Finfo%2FSe aledPower%2FST2140_ANG.jpg

[turbovanman²]

Looks right but I am using Sealed Power #SS72891. You can remove the factory shim too as these are the shim.

[Glmwpg]

Thanks for doing the legwork.. pretty neat!

[shackwrrr]

Awesome, thanks

[DOHCRT]

Just put these in yesterday, Awesome!!! Way better than the originals. Take your time when doing them and count the number of shims removed to make sure you removed all 16...:mad: Luckily I didnt get to far when I realized I forgot to remove a shim from one of them.

Thanks Simon!!!

[turbovanman²]

You guys are welcome, :nod:

[BadFastGTC]

The seal looks to be a polyacrylic material vs viton, are they viton?

[turbovanman²]

I was told they were Viton by the machine shop last year but I'll double check. Good point, thanks.

[MNmopar]

I was told they were Viton by the machine shop last year but I'll double check. Good point, thanks.

For the uninitiated, what does that mean? Are these a no go then? If so, why?

[boost geek]

cool my viton seals almost hit the retainer hope thees clear:o

[RoadWarrior222]

For the uninitiated, what does that mean? Are these a no go then? If so, why?Viton survives a lot of heat, polyacrylic = weaksauce

[MNmopar]

Viton survives a lot of heat, polyacrylic = weaksauce

Ok, thanks! So we should probably wait then until vanman finds out for sure.

[RoadWarrior222]

In most of the motor and transmission, polyacrylic sealing rubbers do fine, they hold up to 205c, 400F but in direct contact with valve stems that could hit 600F intermittently Viton will hold up to that for 48 hours continuous (You'd have to have it pegged for that long at top speed methinks to consider that an issue) or 3000 hours at 230/450 where the polyacrylic would have already given up. (That's about 150,000 miles of very hard driving)

---------- Post added at 11:47 AM ---------- Previous post was at 11:45 AM ----------

Oh btw, that's before the rubber degrades, doesn't account for physical wear, shouldn't plan on valve seals lasting more than about 100K really.

[BaxterStockman]

Looks like the other part number given above, Sealed Power ST2140, are made of Viton. RockAuto also states that Sealed Power SS72891 (the ones that Simon uses) are "Police; Premium valve stem seals incl.; Improved design". That's under the listings for the 1994 Lincoln Town Car with the 4.6L V8. If anyone's running their cars at maximum stress, it's got to be the police...

[black86glhs]

I take it they only fit the 16V cars? Or does anyone know if they work on an 8V?

[turbovanman²]

I take it they only fit the 16V cars? Or does anyone know if they work on an 8V?

Nope, TIII only.

[black86glhs]

Thanks.

[turbovanman²]

I am sure you could find something similar, you need an 8mm valve stem, ours are 7mm. The GM 3100's are 8mm and use that type of seal.

[black86glhs]

That's true. Not that I've had any issues with them so far but good to look for other routes. Since I never worked on the T-III, I didn't know about the smaller valve stem. I figured it was going to be different, just didn't know where the difference would be. I might look into others and see if anything comes of it.

[BaxterStockman]

Update: I spoke to a rep at Federal Mogul (makers of the Sealed Power brand), and #SS72891 valve seals are indeed made of Viton.

[turbovanman²]

Thanks for the update on that.

[DOHCRT]

Just finished a 750+ mile round trip and another 250+ around town driving and all smoke is gone and no other issues. These work awesome and I think it would definitely be something good to find for the 8V cars also.