454 Closed cooling to 496 exhaust manifolds
#1
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Join Date: Sep 2011
Location: Chesterfield Va.
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454 Closed cooling to 496 exhaust manifolds
I have a 87 454 mercruiser with closed cooling system I want to change over to the 496 exhaust manifolds and risers , but not sure exactly how to plumb the cooling hoses. Has anyone done this swap before I know its been done with the raw water cooling, I may be over thinking this but I just want to make sure I get it correct.. Thanks Jamie
Last edited by jamie 10017; 03-07-2017 at 07:11 PM.
#3
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Ayuh,.... What BBC exhaust manifolds are you callin' 496 manifolds,..??
#4
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Your manifolds now are in the closed loop?
The water supply that cools the closed loop should just run out through the manifolds
The water supply that cools the closed loop should just run out through the manifolds
Last edited by class6; 03-10-2017 at 09:11 AM.
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http://www.crowleymarine.com/parts/2...q=22-862210A01
This is what I used in the bottom of the 496 manifolds.
https://www.wholesalemarine.com/ther...FQERaQodPwMLvw
This is what my thermostat housing looks like.
This is what I used in the bottom of the 496 manifolds.
https://www.wholesalemarine.com/ther...FQERaQodPwMLvw
This is what my thermostat housing looks like.
Last edited by BGIII; 03-10-2017 at 01:17 PM.
#8
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I have a 87 454 mercruiser with closed cooling system I want to change over to the 496 exhaust manifolds and risers , but not sure exactly how to plumb the cooling hoses. Has anyone done this swap before I know its been done with the raw water cooling, I may be over thinking this but I just want to make sure I get it correct.. Thanks Jamie
[ATTACH=CONFIG]565449[/ATTACH]
This is my guess of what you want to do. Would need different manifolds
[ATTACH=CONFIG]565450[/ATTACH]
#10
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Ayuh,... 'n Hopefully the H/E is big enough to include the manifolds,...