Sealing the outside of pinion seal

[Bryce Mcclintock]

Im pitting a new diff pinion seal in my 52 Plymouth today it was suggested to me to put sealant around outside of seal as it can leak ? Whats your experience?  If i do put sealant should i put a smear in before and tap seal into it or put it around outside after its installed if i need to at all 

Thanks 

[Sniper]

I've seen seals that already came with a sealant on the outside, nothing need be added there.  Might check to see if your seal is one of those.

 

That said, I don't put anything on the outside of my seals to seal them, but I have seen a thin smear of RTV recommended, make sure you use a compatible RTV though and that it isn't so much that it interferes with installing the seal.

[kencombs]

I second the RTV type.  I use a little different application technique.  There is a box of the cheapest vinyl gloves available in the top of my tool box.  They are used to spread it.   That is the only way I'm able to get a  even, light coat.  Put a little on, spread with the gloved finger and discard.  Too much just looks terrible to me, and excess can cause issues in some applications.

[Bryce Mcclintock]

My seal just has a rubber lip on inside and felt on opposite side just bare metal outter so i wouldnt think ill have a sealant compatibility issue ?

[Bryce Mcclintock]

Sorry just to clarify a thin coat of sealant before i tap seal in ?

[Bryce Mcclintock]

Also havnt seen old seal yet if its the same ill have a refrence but just incase should the felt side of seal be towards fron and rubber side towards diff or other way round .thanks again for your knowledge 

[Sniper]

Oh, I would not have gone with the old school felt type seal.  IIRC, you are in the UK?  Might be tough to find the modern seal equivalent.  I dug around and found it in another post here.  SKF 18880 is the one most commonly used adn should fit your ale, assuming you have the original axle.  The bigger cars, not Plymouths though, use another seal that I can't seem to cross.  Those are like limos and 8 passenger cars, Desotos and Chryslers for the most part.

 

A good parts place should be able to cross the SKF number.  You might also consider a Speedi-sleeve if the pinion shaft is scored.  I do not have a number for that though.

[Bryce Mcclintock]

Oh ok thanks im in New Zealand i ordered these parts from Andy Bearbam? Not the right spelling . Hes in America i assumed it was a the new equivalent not a Nos part im stuck with it now the shipping takes too long 

[DJ194950]

Andy is now oldmoparparts.com with a new owner.

 

DJ

[DJK]

13 hours ago, Bryce Mcclintock said:

Oh ok thanks im in New Zealand i ordered these parts from Andy Bearbam? Not the right spelling . Hes in America i assumed it was a the new equivalent not a Nos part im stuck with it now the shipping takes too long 

I had bad results with the AB NOS seal, as Sniper stated, go with the new neoprene seal if possible and don't forget the speedi sleeve if needed.

[Bryce Mcclintock]

Ok who can i get the neoprene seal from ? I just tryed to install the seal got from Andy and it is almost identical apart from the leather being swapped out for rubber and it outside diameter is slightly bigger .is this because the metal outter squashes a bit when its fitted for a tight seal ? If not it may explain why i cannot get the new seal in cant even get it started  very fustraiting 

[Sniper]

I gave you the SKF number, if you put that number into RockAuto's parts search it'll give you the dimensions, you can use that to see if it will fit your setup.

 

https://www.rockauto.com/en/moreinfo.php?pk=1837032&jsn=272

 

If so, any good parts store should be able to either get the SKF part or cross it to an equivalent.