rear main seal

[03_gt]

im thinking of buying a 86gt and it needs a new rear main seal. how big of a deal is it to replace it?

 

[ECU5.0]

well it depends on if you think pulling the tranny, clutch and flywheel a big deal. also, if its been leaking for awhile and its a 5spd, there is a good chance the flywheel needs resurfaced or replaced and needs a new clutch

 

[03_gt]

how much does it cost for a new seal

 

[cjman15]

20 bucks

 

[03_gt]

would there be much damage done if it has been driven alot with the seal needing to be replaced? thanks for all the help

 

[1991vert]

it'll just leak oil. but in this case it will drip on your flywheel and clutch like stated above.

 

[03_gt]

what would the oil on the flywheel do?

 

[ECU5.0]

the clutch will slip and it will pit the flywheel. ive seen some pictures of flywheels that had oil on them and it aint a pretty site

 

[1991vert]

mine wasnt pitted, just looked like someone had a BBQ on my flywheel

 

[ECU5.0]

mine wasnt pitted, just looked like someone had a BBQ on my flywheel

mmm...what kind of bbq? carolina bbq or texas bbq?

 

[HISSIN50]

mmm...what kind of bbq? carolina bbq or texas bbq?

texas-crude [oil] BBQ

PS, what is a Carolina BBQ?

 

[blk92stangg]

If that's the only thing holding you back from getting an otherwise straight 86, I would say that the leaky seal is no biggie. It would give you an excuse to resurface the flywheel and throw in a new clutch, maybe even change cables, quadrant etc.

 

[03_gt]

this is the ad for it and its canadian

86 gt
16" centerline stars
flowmaster mufflers
off-road H-pipe
fuel-injected 5.0L motor
sunroof
primer on red-interior
210,000kms
Aircared till next year
runs good
sony cd player

Needs some work
1400$obo

 

[Michael Yount]

The other thing to be aware of is that when engine's produce too much crankcase pressure, or the pressure isn't vented properly (pcv system is malfunctioning) it will force oil out of seals and gaskets. Many a rear main seal has been replaced only to find that the new leaks also. Crankcase pressure will force oil out of a brand new seal.

I'm not saying there's nothing wrong with the seal. Just understand that a leaking seal doesn't necessarily mean that the seal is bad. High mileage engines with deteriorating ring seal and excessive blow by create excessive crankcase pressure. Clogged oil traps and pcv valves also can cause excessive crankcase pressure.

hissin - what's Carolina BBQ? you gotta come over this way; I'll treat you to some BBQ.

 

[ECU5.0]

texas-crude [oil] BBQ

PS, what is a Carolina BBQ?

vinegar based sauce.....its the best

 

[_jb_]

Yeah I have a leaking rear main seal. I've been driving it since the spring, and I haven't noticed any difference in performance when I drove it up and down the driveway last fall. But this fall/winter I will pull the engine out and fix that, and there is a good chance of putting in a 331 Stroker. If not the stroker, maybe turn it into a 306, or at the least rebuild the 302. Be a great time to clean the engine bay, paint the engine, and all that good stuff!

 

[HISSIN50]

Michael, im there!

 

[GT Trooper]

The other thing to be aware of is that when engine's produce too much crankcase pressure, or the pressure isn't vented properly (pcv system is malfunctioning) it will force oil out of seals and gaskets. Many a rear main seal has been replaced only to find that the new leaks also. Crankcase pressure will force oil out of a brand new seal.

I'm not saying there's nothing wrong with the seal. Just understand that a leaking seal doesn't necessarily mean that the seal is bad. High mileage engines with deteriorating ring seal and excessive blow by create excessive crankcase pressure. Clogged oil traps and pcv valves also can cause excessive crankcase pressure.

hissin - what's Carolina BBQ? you gotta come over this way; I'll treat you to some BBQ.

Where is the PCV valves located?

 

[ECU5.0]

Where is the PCV valves located?

back of the motor right behind the intake. just stick your hand back there and youll feel it

 

[ECU5.0]

hissin - what's Carolina BBQ? you gotta come over this way; I'll treat you to some BBQ.

eh, is it memphis bbq or carolina bbq? there is a difference, but i love both. mmm..delicious