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#1 |
Senior Member
Join Date: Nov 2010
Location: Indiana
Posts: 251
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The rear main leaks pretty bad from the weep hole in the bottom of the fly wheel case. It has become untolerable to drive far. Is there any way to fix this short of pulling the engine and spending a lot of $$ ? Otherwise engine runs fine. Thoughts?
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#2 |
Senior Member
Join Date: May 2010
Location: Littleton, Colorado
Posts: 241
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Leaks can come from various places and leak out the hole in the bell housing. Check to see exactly where the leak is coming from.
http://antiqueenginerebuilding.com/REARMAINLEAK.html Mine had a bad leak and I was embarrassed to park anywhere someone would see how bad it was ![]() ![]()
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#3 |
Senior Member
Join Date: Feb 2011
Location: Cocoa, Florida
Posts: 1,609
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Also make sure that crankcase pressure isn't forcing the oil out the rear main drain back tube. You do this by making sure your oil fill tube's cap isn't pushed on to tight and can allow the case to breath properly. The pressure pushes the oil from the pan, up the tube, and out the rear main seal if not vented properly.
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#4 |
Senior Member
Join Date: May 2010
Location: Rhode Island
Posts: 649
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My leak was caused by a blockage in the oil drain pasage in the main bearing block.
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#5 |
Senior Member
Join Date: May 2010
Location: ca.
Posts: 2,522
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my leak was caused by my K&N filter . not enuff breathing . installed pcv valve .......
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#6 |
Senior Member
Join Date: Jan 2011
Location: Colorado Springs
Posts: 868
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#7 |
Senior Member
Join Date: May 2010
Location: OKC / Tonkawa, Ok.
Posts: 1,977
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The article referenced by Greg is an excellent place to start. Until then several online vendors sell what we call a diaper to help control the leaking until you can sort it out. Spend some time and search through some of the older postings on rear main oil leaks and you will find a wealth of information.
Rear Main Diaper
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#8 |
Senior Member
Join Date: Jun 2010
Location: Maryville,Tn
Posts: 304
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My leak was the missing gasket between the flywheel housing and block..at the end of the cam.
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#9 |
Senior Member
Join Date: May 2010
Location: Texas
Posts: 263
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Over filling the oil pan can cause a leak. use 4 1/2 gt. Bill
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#10 |
Senior Member
Join Date: Jul 2011
Location: Southwestern Connecticut
Posts: 934
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The drain tube for my Rear Main was seated too deep and bottomed out, obscuring the opening. It really was an easy fix.
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