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SurfRaider
Samba Member
Joined: June 19, 2020
Posts: 9
Location: Montreal
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 Posted: Wed Sep 09, 2020 10:01 pm Post subject: Replacing rear main seal |
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| Hey gang, I will be replacing the rear main seal on my 85 hightop 4 speed manual trans. and would like any advice you may have. I have removed the transmission and replaced the throw out bearing and cv axles before, but I have never taken the clutch out and done a seal replacement before. I have the Bentley book downloaded and ready to go. I have the parts and the special tool for the alignment. Im a little nervouse and would appriacate any guidance and help. Thank you for your time. |
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shadetreemech
Samba Member
Joined: October 05, 2005
Posts: 777
Location: Claremont, CA
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MarkWard
Samba Member
Joined: February 09, 2005
Posts: 17155
Location: Retired South Florida
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| Posted: Thu Sep 10, 2020 6:31 am Post subject: Re: Replacing rear main seal |
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2 points. It is best practice to measure the crank end play prior to removing the flywheel. You recheck it after you have the flywheel reinstalled.
Besides the main seal, there is an O ring that is “inside” the flywheel hub that seals where the crank and flywheel meet. Change that.
Ok 3 points. Now would be the time to inspect the mainshaft pilot bearing press into the end of the crank. Replace it or at minimum work some grease into the rollers.
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T3 Pilot
Samba Member
Joined: January 10, 2011
Posts: 1507
Location: Deep South of the Great White North
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| Posted: Thu Sep 10, 2020 6:56 am Post subject: Re: Replacing rear main seal |
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Watch “the man” completing this operation....
https://www.youtube.com/watch?v=v7lpH4TDA7M
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1988 Vanagon
The most important part in every vehicle is the nut behind the wheel...... |
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thatbaldwinlife
Samba Member
Joined: August 01, 2011
Posts: 777
Location: Out exploring
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| Posted: Thu Sep 10, 2020 10:12 am Post subject: Re: Replacing rear main seal |
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| MarkWard wrote: |
2 points. It is best practice to measure the crank end play prior to removing the flywheel. You recheck it after you have the flywheel reinstalled.
Besides the main seal, there is an O ring that is “inside” the flywheel hub that seals where the crank and flywheel meet. Change that.
Ok 3 points. Now would be the time to inspect the mainshaft pilot bearing press into the end of the crank. Replace it or at minimum work some grease into the rollers. |
this
and buy a high quality seal and not the cheapest you can find. they are different.
nate
_________________
1987 Westy
Insta: @Thatbaldwinlife
Vanagon Adventure and DIY videos:
That Baldwin Life YouTube Channel |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50352
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| Posted: Thu Sep 10, 2020 5:32 pm Post subject: Re: Replacing rear main seal |
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| Use a Sabo seal and always replace the pilot bearing if there are many miles on it. The pilot bearing is very often the first piece in the clutch kit to fail and will eat up your input shaft when it does. I also usually replace the clutch disc while I have access, even when the disc still has a lot of life in the lining, the springs may be close to failure or have already failed. I seldom replace the clutch cover or have the flywheel turned unless they look really bad, either from wear or heat. |
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