Rear main seal question

[testorossa1989]

As the title says. Where's everyone getting their "Oil Singers" for the rear main seal. My new main seal didn't come with and after deep search I found conflicting answers. And it seems Ford doesn't even offer the part, nor does any sub genuine retailer. I can't be going crazy... Is there a more current answer to this, or where to find the part new aside from Fel

 

[P49Y-CY]

that two-piece oem seal and slinger isn't completely necessary imo. you could do it and i think both pieces are still available from ford (i checked this past winter and they were, but it's best to have the part #'s handy or they might not show it, like you said). but i wouldn't try to install that without the very complex rotunda tool (or its equivalent). i think it needs to be set dead nuts perpendicular to the crank.

imo the felpro one-piece design works just fine and is more simple, and allows more room for error.

check out john smith racing on youtube, he gets into the rear main seal on a couple of his builds

 

[01yellercobra]

I ran the Felpro on my old engine without an oil slinger and never had an issue with the rear main leaking.

 

[testorossa1989]

Guess I'll try the Fel-pro. Hopefully it don't leak.

 

[P49Y-CY]

you should be fine. just take your time installing it in the cover and over the crank.

neither of my terminators needed one when i refreshed their engines, but my 4.6 f-150 engine did and so far the felpro hasn't leaked (but to be fair i only have about 6k on it).

i am a rotunda special tools "enthusiast" and i love buying the tools that are called out in the factory service manual. (the more money than brains club lol).

to give you an idea of how complicated the two-piece design is, these are the tool #'s that ford specifies to replace the rear main seal:

303-514 slinger remover
303-516 seal installer
303-517 slinger installer
303-518 seal installer
303-519 seal remover

i'm sure it's the best and most thorough way to do it, but it's just not necessary, and somehow i doubt dealership techs were doing it this way every time.

 

[Bullitt1448]

I did mine about 6 months ago, I believe it was a factory part. Not had it running yet so don’t know if it going to leak. Did not have the “proper” tool so installed it the old way. I have done lots on Detroits and Cummins in the field that way with minimal issues, fingers crossed that this one doesn’t leak.