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Coolant leak from exhaust manifold bolts
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   Forward Look Technical Discussions -> Engine, Exhaust, Fuel and IgnitionMessage format
 
lozrox58
Posted 2024-05-01 8:27 PM (#634978)
Subject: Coolant leak from exhaust manifold bolts



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Location: Newcastle Australia		1959 Dodge 361 low deck engine.
It's been fully reconditioned.
I'm just dong a pressure check on the coolant system.
I have coolant leaking past the front two exhaust manifold bolts on the generator side.
Has anybody ever heard of this before?
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Powerflite
Posted 2024-05-01 9:04 PM (#634979 - in reply to #634978)
Subject: Re: Coolant leak from exhaust manifold bolts



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Location: So. Cal		Yes, the exhaust bolts go through to the coolant. All of them do. So it's amazing that you only have 2 problems. I recommend taking them all out and using hi-temp silicone or other sealant on the threads before inserting them back in. Drain the fluid first, of course.
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lozrox58
Posted 2024-05-01 9:49 PM (#634980 - in reply to #634979)
Subject: Re: Coolant leak from exhaust manifold bolts



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Location: Newcastle Australia
Powerflite - 2024-05-02 11:04 AM

Yes, the exhaust bolts go through to the coolant. All of them do. So it's amazing that you only have 2 problems. I recommend taking them all out and using hi-temp silicone or other sealant on the threads before inserting them back in. Drain the fluid first, of course.


Thank you.
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1960fury
Posted 2024-05-02 11:26 AM (#634986 - in reply to #634979)
Subject: Re: Coolant leak from exhaust manifold bolts



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Powerflite - 2024-05-01 9:04 PM

it's amazing that you only have 2 problems.


Never ever had this problem with any of my BB cars except when I removed the manifolds and a nut took the stud with it.
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