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View Full Version : Think these valve stem seals would work on our 8Vs?


iangoround
06-02-2013, 07:24 PM
I picked up a set of these:

http://www.summitracing.com/parts/sme-143008/overview/

And haven't gotten to install them yet. Any predictions?
turbovanmanČ
06-02-2013, 08:55 PM
Predictions-don't think they will fit.
iangoround
06-03-2013, 08:26 PM
Predictions-don't think they will fit.


You're right. Oh well.
shackwrrr
06-03-2013, 08:49 PM
Any other seals that might fit? I need to swap springs very soon (blowing them open) and would Like to find a set of seals to put on while I am at it.
turbovanmanČ
06-04-2013, 01:43 AM
What is wrong with the stock seals? They work perfectly fine and are cheap.
iangoround
06-04-2013, 03:16 PM
I've had a few of them pop off my less than 1000 mile rebuilt head. I was looking for something to keep that from happening again.
turbovanmanČ
06-04-2013, 03:20 PM
I've had a few of them pop off my less than 1000 mile rebuilt head. I was looking for something to keep that from happening again.

Maybe a low grade seal? Valve guide dropped? Notch on guide not deep enough? Honestly, never had that happen to me in too many years to count unless there was a guide issue or the seals went rock hard.
iangoround
06-04-2013, 07:26 PM
I dunno. Tyler VanLant did this head for me with +1mm valves, Comp 942 springs and all new guides, etc. The seals I took off look just like the new mopar viton seals I bought from FWDP and are still pliable, but some had just ridden up off the guide a little bit.


Maybe a low grade seal? Valve guide dropped? Notch on guide not deep enough? Honestly, never had that happen to me in too many years to count unless there was a guide issue or the seals went rock hard.
turbovanmanČ
06-05-2013, 02:45 AM
Weird, maybe the guides don't have the catch groove deep enough!
minigts
06-05-2013, 03:40 PM
I've had a few of them pop off my less than 1000 mile rebuilt head. I was looking for something to keep that from happening again.

I don't encourage 'fixing' things this way, but if your head has low miles and you can't get the seals to seat or stay seated, I cleaned mine really good, dabbed some silicone on the inside of the seal where it seats on the head and then put them in place. So far I have had no issues with them backing off or anything. Doesn't take much silicone either, just enough to have a thin coat on the inside of the seal, but make sure everything is clean and free of oil if you do this, otherwise it will prove ineffective.
Chris65
06-05-2013, 08:32 PM
I've been using the blue viton seal on everything lately. I haven't had any issues with them coming off the guides on any of the engines I used them on. I think the ones that fit the 8V engines are these: http://www.ebay.com/itm/Manley-Valve-Stem-Seals-Positive-Stop-Viton-312-Stem-Dia-0-530-Guide-DiaOf8-/330933704879?pt=Motors_Car_Truck_Parts_Accessories&hash=item4d0d2f98af&vxp=mtr