Rear Main Problem?
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Joined: Jan 2000
Posts: 276
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From: Lee's Summit, MO
Rear Main Problem?
Does anyone that has a 2.8 have a rear main leak? I have had 2, an 88 and an 89, and they both started leaking at 150k miles. My friend had an 86 that leaked also. Anyone else think this is an inherant problem?
Vman
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1969 Camaro Sport Coupe
383, 700R4, leather, everything black but the lights
Previous owner of an 89 RS Camaro
2.8L V6, 700R4
Vman
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1969 Camaro Sport Coupe
383, 700R4, leather, everything black but the lights
Previous owner of an 89 RS Camaro
2.8L V6, 700R4
Supreme Member
Joined: Dec 2000
Posts: 2,375
Likes: 0
From: Tucson, AZ, USA
Car: '99 Trans Am, '86 Camaro
Engine: LS1, Scrap
Transmission: T56, T5
Axle/Gears: 3.42 Stock ZT, 3.42 Open
Yep.. I've had that leak since at least 140k miles.. definitly rear main.. front main too.. and a little trans to boot.. Someday I'll have this car happy, I swear.. .. someday..
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'86 Camaro SC, black /w silver racing stripes
2.8l MPFI/700r4 /w special 2nd gear delete option
In search of new v8 engine & transmission, now contemplating t5 swap to get me out of this mess.
MSD coil, Accel 8mm wires, SplitFire plugs, Gabriel hijackers, possible performance chip I don't know about.. gotta crack open the ECM and check sometime
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'86 Camaro SC, black /w silver racing stripes
2.8l MPFI/700r4 /w special 2nd gear delete option
In search of new v8 engine & transmission, now contemplating t5 swap to get me out of this mess.
MSD coil, Accel 8mm wires, SplitFire plugs, Gabriel hijackers, possible performance chip I don't know about.. gotta crack open the ECM and check sometime
Supreme Member
Joined: Mar 2000
Posts: 13,414
Likes: 6
From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
It might also be the 1-inch-inside-diameter O-ring seal on the distributor shaft. The rubber o-ring hardens up over time, and loses it's sealing ability. It mimicks a rear-main seal leak, too- the oil runs down the back of the block and around the rear of the crank.
I could've sworn I had a rear main leak; I even pulled the flexplate inspection cover to see oil around the back of the crank. My mechanic told me (after he was trying to diagnose my no-start problem by rebuilding the distributor) that he fixed my oil leak- and he showed me a very-cracked & brittle o-ring. Sure enough, the leak was gone!
You can buy a 5-pack of 1 inch I.D o-rings from Pep Boys or AutoZone or etc... look for where they have their metal drawers in the aisles; usually by the nuts & bolts. Or a "real" parts store will have their own O-ring assortment behind the counter, and can give you an o-ring for $0.50 or so.
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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!
I could've sworn I had a rear main leak; I even pulled the flexplate inspection cover to see oil around the back of the crank. My mechanic told me (after he was trying to diagnose my no-start problem by rebuilding the distributor) that he fixed my oil leak- and he showed me a very-cracked & brittle o-ring. Sure enough, the leak was gone!
You can buy a 5-pack of 1 inch I.D o-rings from Pep Boys or AutoZone or etc... look for where they have their metal drawers in the aisles; usually by the nuts & bolts. Or a "real" parts store will have their own O-ring assortment behind the counter, and can give you an o-ring for $0.50 or so.
------------------
-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
---Think your car could be pic of the week? Visit http://www.f-body.net for details!
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