antifreeze from exhaust manifold bolt?
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Joined: Jan 2008
Posts: 137
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From: San fernando Valley
Car: 1983 pontiac Trans am ws6
Engine: 350
Transmission: 700r4
Axle/Gears: ????
antifreeze from exhaust manifold bolt?
i have a 350 4bbl carb, i saw oil leaking from the front passenger side manifold bolt (the one that the smog stuff bolts to, its the closest to the alternator) and i decided to pull it, and as it was coming out antifreeze started gushing out of it? is this normal for the exhaust manifold bolt to hold back water?
Joined: Mar 2000
Posts: 43,187
Likes: 45
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
It's not "normal", but not unheard of. I had it happen with some World heads when I used 1" instead of 3/4" header bolts.
Thread Starter
Member
Joined: Jan 2008
Posts: 137
Likes: 0
From: San fernando Valley
Car: 1983 pontiac Trans am ws6
Engine: 350
Transmission: 700r4
Axle/Gears: ????
Re: antifreeze from exhaust manifold bolt?
heads gone? (dumb question but figured id ask anyways) cuz i think i used a bigger bolt too
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Joined: Oct 2008
Posts: 629
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From: The Sticks, Ca.
Car: '79 Camaro; '84 Z28
Engine: 350; none
Transmission: TH-350, 2500 stall; none
Axle/Gears: posi, 3.08; disc, 3.23
Re: antifreeze from exhaust manifold bolt?
Sorry, no it is not supposed to do that. Water coming from those bolt holes means you have punctured the water jacket. A decent machine shop ought to be able to repair it though.
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Joined: Apr 2007
Posts: 365
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From: Winnipeg, MB, Canada
Car: 1984 Camaro Z28 T-tops
Engine: 350
Transmission: T-5
Axle/Gears: 3.23
Re: antifreeze from exhaust manifold bolt?
With some sealant it should seal just as well as the intake manifold bolts I should think. Should be fine.
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Joined: Mar 2000
Posts: 43,187
Likes: 45
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Still running the heads. I put a glob of silicone into the bolt hole, coated the header bolt threads with sealant. Works fine.
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