Jump to content

One stubborn rear main seal


Recommended Posts

This is by far the hardest rear main I've done yet. Original RMS with 225K+ miles on it and hard as a rock. Tried all the tricks in the book - loosened all of the main bearings and dropped the crank down a bit, hit both sides of the RMS with a brass drift trying to get it to budge and nothing.

 

Any other secrets? This thing is STUCK and I need this truck back on the road by the weekend.

 

Thanks!

Link to comment
Share on other sites

I've always used a punch to get it started then pushed it out with a brass rod flattened.(the brass rod is a brazing rod smashed on the end and bent into a slight curve.I have never loosened any of the other main bearing caps.try finding a punch almost the width of the rms get as close as you can to the crank without touching it and smacking it with a hammer. sometimes they get hot and kinda melt themselves on.honestly getting the seal out is all about the angle at which you push.hope some part of this helps :)

Link to comment
Share on other sites

After I made my initial post, I went back underneath the truck with a steel punch and did exactly that, but it didn't budge. I stopped before I let my frustration get the best of me since a steel punch near a crankshaft is not the place you want to be when you're starting to get angry. I'll try it again tonight...

Link to comment
Share on other sites

When I did mine, I had to tap on each side of the seal quite a few times to get it to unseat. Someone here mentioned that they used plastic chopsticks as the tapping tool - strong enough to put some force on the seal, but they'll break before they damage anything important. Mine came out before it got to that point, but you may have success.

Link to comment
Share on other sites

I got it out tonight. I just kept at it with a 3/16" brass rod tapping on both sides of the seal before it finally budged. I tried a 1/8" rod, but the amount of force I needed to use to get the seal to budge was just bending it. New seal is in, main bearing caps are all torqued down per the service manual. Got the oil pan in the parts washer just about ready to go back on. Should have it fired up tonight just in time for the weekend.

 

Thanks fellas!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...