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 Rear Main leak
#1005139
08/04/10 07:16 PM
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Joined: Apr 2008
Posts: 12
OP
Need a Spot
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Good day all. I have an 89 Raider 3.0 V6 Auto 4WD. I just had the rear main oil seal replaced and trans,transfer case fluid change by a local transmission shop $698. I drove the truck about 40 miles around town and everything was fine. I then drove about 135 miles on vacation and noticed the oil leak had returned. Besides improper installion, what causes the rear mail seal to leak? I guess I'll be taking it back to shop.
89'Dodge Raider 3.0 V6, A/T
LSD, KYB equipped
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Re: Rear Main leak
[Re: Torsion]
#1005140
08/04/10 07:24 PM
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Joined: May 2007
Posts: 4,628
Roll Me Over
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Bad seal, bad install, high oil level, clogged PCV system, snag on the crank end, as well as others that I'm sure I'm forgetting... That thing ain't easy to successfully fix in a surgically clean environment... <img src="/forums/images/graemlins/lol.gif" alt="" />
Fasteddy's advice is occasionally sound...
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Re: Rear Main leak
[Re: Torsion]
#1005141
08/04/10 07:45 PM
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Joined: Feb 2004
Posts: 10,238
Web Wheeler
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The seal surface area on the 3.0L crankshaft can become worn after a time and not seal well even with proper installation technique. As Larry said, proper installation can be difficult to achieve for that seal on these engines.
Since you're having a shop do the installation, I won't suggest any ways to work around the installation issue - except to say that there is a seal surface repair sleeve available. It's made by Micro-Sleeve and sold through NAPA stores. Installing it is also an art form and can be problematic if the installer isn't familiar with repair sleeves. Done right, it's the best way to resolve the issue.
Frank
'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
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Re: Rear Main leak
[Re: FrankR]
#1005142
08/04/10 08:51 PM
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Joined: Apr 2006
Posts: 1,193
Body Damage is Cool
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seal installed backward <img src="/forums/images/graemlins/rolleyes.gif" alt="" />
it dosent have to be surrounded by water to be an island
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Re: Rear Main leak
[Re: mxmikie]
#1005143
08/04/10 09:14 PM
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Joined: May 2007
Posts: 4,628
Roll Me Over
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seal installed backward <img src="/forums/images/graemlins/rolleyes.gif" alt="" /> Like I said, there's one's I'm forgetting. I've seen that before. mx, love your new avatar <img src="/forums/images/graemlins/kewl.gif" alt="" />
Fasteddy's advice is occasionally sound...
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Re: Rear Main leak
[Re: hazy_daze]
#1005144
08/04/10 09:57 PM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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Seal spring popped off during install...
Not responsible for advice not taken...
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Re: Rear Main leak
[Re: fasteddy]
#1005145
08/04/10 10:45 PM
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Joined: Sep 2004
Posts: 4,479
Roll Me Over
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Eddy, I used to have springs pop off from time to time. Thankfully I read where (I believe it was you) pack them with grease I never had a spring pop off since. <img src="/forums/images/graemlins/kewl.gif" alt="" />
Richard E 1989 Montero - Stock-ish 1989 V6 Auto Raider - 5.3 Vortech Swap. 1987 Mitsubishi Starion 2.6t, soon to be 3.5 1983 Honda XL600R 
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Re: Rear Main leak
[Re: StockRaider]
#1005146
08/05/10 12:54 AM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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Thank Charlie, the old drunken a&p mech who taught me most of the useful mechanical knowledge I know. I just pass it on...
Not responsible for advice not taken...
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Re: Rear Main leak
[Re: FrankR]
#1005147
08/09/10 04:19 PM
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Joined: Mar 2006
Posts: 749
Rock Warrior
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The seal surface area on the 3.0L crankshaft can become worn after a time and not seal well even with proper installation technique. As Larry said, proper installation can be difficult to achieve for that seal on these engines.
Since you're having a shop do the installation, I won't suggest any ways to work around the installation issue - except to say that there is a seal surface repair sleeve available. It's made by Micro-Sleeve and sold through NAPA stores. Installing it is also an art form and can be problematic if the installer isn't familiar with repair sleeves. Done right, it's the best way to resolve the issue.
Frank Not that I'm against NAPA but a quick Google search showed they are sellign direct online, with 2 different rear seals available for original and regorund cranks. Sellign for about $7 ea here at their site. Something I may have to look into myself! Thanks for the tip! Jim
89 Montero LS 3.0L/Auto
90 MightyMax 2.4L/Man
Parted/gone - parts available!
89 Montero LS 3.0L/Auto [Blue/Blue] (2 of 2)
89 Conquest SHP
88 Conquest SHP
87 Dodge Raider 2.6L/Auto
91 Montero RS 3.0L/Auto
Others: 37 Lincoln
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