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86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

rear main seal

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Old Dec 20, 2009 | 12:37 PM
  #1  
bottles's Avatar
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From: Federal Way WA
rear main seal

hey guy got a V6 that has a little oil leak very little im thinking it my be the rear main but not sure.

i dont know if its it but if it should i be worrid about it and is there away to find out with out pulling the trans and were are the V6 know to have oil leak
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Old Dec 20, 2009 | 12:53 PM
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From: Hillsboro, OR
The valve covers are known to leak at the back, or just all around. Get a light and a mirror and start lookin. Id get some brake cleaner and wipe everything down, then after a few days take a look again and see if theres any new spots.

My oil pan gasket leaks so it makes it look like my rear main is leaking. If your rear main is leaking, you can get oil on your clutch and toast your clutch.

When I replaced my clutch the rear main looked brand new, im guessing this seal had 100k on it, but I replaced mine since i was in there. youve gotta pull the flexplate/flywheel to replace the seal by the way.

Last edited by Tubbyfatty; Dec 20, 2009 at 12:55 PM.
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Old Dec 20, 2009 | 01:06 PM
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hey i did my clutch not to long ago but did not do the seal it looked new maybe it is the oil pan i lose about 1/4 to 1/2 a qurt of oil every 1200miles or so and the truck has 207000miles on it so is that about normal?
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Old Dec 20, 2009 | 01:29 PM
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It could be that rear main. Check the valve cover gaskets first, those are easy to replace (you have to pull the upper plenum tho, its easy).

If its not your valve cover gaskets, or your oil pan, id pull the tranny again and replace that seal.

Do you see any oil spots under your truck?
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Old Dec 20, 2009 | 01:44 PM
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one of the valve covers look ok one has a little oil but not much im hoping oil pan if it was the rear main woundet my clutch go out.

i looked were i park saw i little oil but my friend parked there with a rear end leak so idk if its mr or him
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Old Dec 20, 2009 | 04:27 PM
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if you are loosing 1/4-1/2 quart every 1200 miles through your oil pan gasket you should have a decent oil stain where you park. Same with valve covers.
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Old Dec 20, 2009 | 07:30 PM
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Also something to think about, motors with alot of miles tend to burn oil.
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Old Dec 20, 2009 | 07:51 PM
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From: Temecula Valley, CA
And oil seals, valve cover gaskets included, tend to leak more when it's colder outside.
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Old Dec 20, 2009 | 10:29 PM
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the more i look at it i think its the oil pan so im not to woried about it. but ill keep a eye on my oil and see what happins.
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