Rear main seal install help
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Tuned
Joined: May 2009
Posts: 442
Likes: 2
From: The Buckeye State
Rear main seal install help
So I’m getting ready to replace the rear main seal in my 90 F150 302 2wd auto. I’m seeing a tool is recommended to install the seal properly. However every place I contact doesn’t have a tool to purchase or rent. I’ve found some for over $300 but that seems crazy.
Are there other options? Is a tool necessary?
Thanks!
Are there other options? Is a tool necessary?
Thanks!
Mountain Pass
Joined: Jan 2004
Posts: 153
Likes: 19
I'm gonna do mine in the near future as well. From what I've seen, some say just tap it on with a hammer very carefully so you don't get it twisted. Some folks have had success taking a cap for 3" PVC pipe and using it as a driver to tap the seal on evenly. Other folks say don't bother replacing the seal if you don't put a repair sleeve on the crank. Also some debate over whether you want the rubber or teflon seal.
I'm interested to hear the input from others.
Edit: I was thinking 351w like mine. Sorry. Your 302 might be slightly different.
I'm interested to hear the input from others.
Edit: I was thinking 351w like mine. Sorry. Your 302 might be slightly different.
Logistics Pro
Joined: Mar 2005
Posts: 4,698
Likes: 47
From: Mexico, Missouri
You can use the old seal to tap the new one in.
There's debate over a repair sleeve or not. If the crank isn't damaged or doesn't have a groove run into it from the old seal, then you should be ok without the sleeve. Use a rubber seal with a repair sleeve not PTFE seal. If installing the seal, you can also use Lubriplate or other non tacky grease packed on the inside of the seal to keep it tight. Lubricate the crank and the seal well with oil.
Just be sure to install it correctly, not twisted, and don't damage the crank.
There's debate over a repair sleeve or not. If the crank isn't damaged or doesn't have a groove run into it from the old seal, then you should be ok without the sleeve. Use a rubber seal with a repair sleeve not PTFE seal. If installing the seal, you can also use Lubriplate or other non tacky grease packed on the inside of the seal to keep it tight. Lubricate the crank and the seal well with oil.
Just be sure to install it correctly, not twisted, and don't damage the crank.
Lead Driver
Joined: Feb 2002
Posts: 7,961
Likes: 594
From: Greater Austin, Texas
If you are going to all that trouble to replace the rear main seal, why would you not use a repair sleeve? I personally have not used a tool, I just tap it in with a hammer, being careful to keep it straight by going around the seal tapping a little at a time.
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Tuned
Joined: May 2009
Posts: 442
Likes: 2
From: The Buckeye State
Thanks for the replies. I picked up a Felpro seal from Advance Auto. The truck has 200k on it but runs great I may go ahead and pick up a repair sleeve as well considering the mileage. How do I know when the seal is in all the way? Will it be flush on the outside?
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