Coolant flow question
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 3,242
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From: Lexington, North Carolina
Coolant flow question
This may sound real dumb, but I don't know how the coolant flow is supposed to be on the heater core! There is a hose from the water pump that goes to the bottom of the heater core. From the heater core there is a hose that goes through a vacuum switch, to the top of the intake manifold. My question is: Is the water pump pushing antifreeze through the heater core into the manifld, OR is water being "sucked" by the water pump from the intake manifold, through the heater core?
Thanks in advance! I feel so dumb! :crazy:
Thanks in advance! I feel so dumb! :crazy:
Drifting
Joined: Sep 1999
Posts: 1,439
Likes: 1
From: Hagerstown MD
Re: Coolant flow question (JohnS_77)
Not dumb at all. I asked the same question about a month ago so obviously it's not dumb. :crazy:
The coolant goes from the pump into the engine block where it goes into the heads and intake manifold, and from the manifold to the heater core. Coolant returns to the pump via the heater hose and lower radiator hose.
Think of water under high pressure being forced into an iron pipe. Iron pipe is stronger than a rubber hose. Also, that's why the lower radiator hose has a spring inside it... so the suction created by the pump won't crush the hose.
The coolant goes from the pump into the engine block where it goes into the heads and intake manifold, and from the manifold to the heater core. Coolant returns to the pump via the heater hose and lower radiator hose.
Think of water under high pressure being forced into an iron pipe. Iron pipe is stronger than a rubber hose. Also, that's why the lower radiator hose has a spring inside it... so the suction created by the pump won't crush the hose.
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 3,242
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From: Lexington, North Carolina
Re: Coolant flow question (zymurgist)
:seeya Thanks for your help!!!
So should the hose from the manifold go to the bottom of the heater core, or doesn't it matter?
So should the hose from the manifold go to the bottom of the heater core, or doesn't it matter?
Drifting
Joined: Jan 2002
Posts: 1,645
Likes: 11
From: Schaumburg IL
Re: Coolant flow question (JohnS_77)
You use two hoses. One is a 5/8" ID and the other is a 3/4" ID. The 5/8" goes to the intake manifold fitting and has a mate of 5/8" on the heater core. The water pump line is the 3/4" hose. They only fit properly on one fitting at the engine and the heater core. If you are moving them around it is cheap insurance to change them out.
Tip - If you don't need a GM number stenciled on them, go to Auto Zone etc and ask for the longest 5/8" and 3/4" with molded 90 degree bends on one end. Much much cheaper than the vette houses. Then just connect at the heater core and run them neatly to the block and you will have plenty to spare. Cut to length.
Tip - If you don't need a GM number stenciled on them, go to Auto Zone etc and ask for the longest 5/8" and 3/4" with molded 90 degree bends on one end. Much much cheaper than the vette houses. Then just connect at the heater core and run them neatly to the block and you will have plenty to spare. Cut to length.
Thread Starter
Melting Slicks
Joined: Dec 2000
Posts: 3,242
Likes: 0
From: Lexington, North Carolina
Re: Coolant flow question (bigvette1)
He is just trying to learn where the hose goes.
Yes, I am getting married on August 30th. The Vette would look kind of funny sitting in front of the church leaking antifreeze with steam coming out from under the hood. :lol:
Unless, Rod, we could take your Vette to and from the church. :rofl: :p:
