oil leak on exhaust
#1
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Car: 91 ws6
Engine: Carb'd 334 stroker
Transmission: T5
oil leak on exhaust
Howdy,
I have an 85 t/a, 305 mostly stock minus an edelbrock intake and a 4 barrel.
Runs fine, but after a couple mins of running she smokes from either side of the engine and appears to be coming from the flanges on the exhaust manifolds. They are indeed wet with oil.
Could that be a leaky head gasket?
when I got the car, she was sitting for like 9 years. I've replaced intake gaskets, exhaust manifold gaskets, dizzy gasket and valve cover gaskets. Never pulled the heads so never replaced em.
The leak appears to start around the #8 and 7 bottom of the heads
Any ideas?
I have an 85 t/a, 305 mostly stock minus an edelbrock intake and a 4 barrel.
Runs fine, but after a couple mins of running she smokes from either side of the engine and appears to be coming from the flanges on the exhaust manifolds. They are indeed wet with oil.
Could that be a leaky head gasket?
when I got the car, she was sitting for like 9 years. I've replaced intake gaskets, exhaust manifold gaskets, dizzy gasket and valve cover gaskets. Never pulled the heads so never replaced em.
The leak appears to start around the #8 and 7 bottom of the heads
Any ideas?
#2
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Re: oil leak on exhaust
I would guess valve cover gasket.
#3
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Car: 85 Silver Iroc, 79 Camaro
Engine: LB9, 500+ ci BBC
Transmission: 700R4, th400 with brake
Axle/Gears: 3.42, hand made 40 spline 9"
Re: oil leak on exhaust
Or the back of the intake is leaking oil.
#4
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Car: 85 T/A
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.27
Re: oil leak on exhaust
If you over tightened the valve cover when you replaced the gasket you probably cut the gasket. I would pull the covers back off and check the gaskets.
#5
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Car: 89 Black IROC-Z convertible
Engine: 305 TBI
Transmission: Auto
Re: oil leak on exhaust
It could be an intake gasket but my money is on the valve cover gaskets.
#6
Supreme Member
Re: oil leak on exhaust
I always use a torque wrench when tightening even the valve covers, can't remember exactly but think something like 7 foot lbs on the valve covers. This requires that I use my inch pound wrench and multiply by 12. Works great to keep you from over tightening the gaskets.
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Car: '84 Camaro - 2010 Surf Blue
Engine: 305 - 4 bbl Holley
Transmission: WC T5
Axle/Gears: 3.08
Re: oil leak on exhaust
I always use a torque wrench when tightening even the valve covers, can't remember exactly but think something like 7 foot lbs on the valve covers. This requires that I use my inch pound wrench and multiply by 12. Works great to keep you from over tightening the gaskets.
I recently fixed a persistent heavy leak from behind the block when I replaced my oil pressure sending unit at the time I installed new gages. It was an unexpected bonus that my oil leak went away!
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