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Heater core, which way does the coolant flow [message #172798]

Sun, 10 June 2012 12:37

RF_Burns

Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada

Karma:

Senior Member

My thermostat is sticking open, so I'm installing a new one today.

While I'm at it, I want to install a shutoff valve on the heater core. The valve I has shows a coolant flow arrow for direction on it, but I don't know which hose is coming and going.

One hose is larger (3/4" I believe) and goes to the waterpump. The second hose is smaller (5/8") and goes to the T connection at the back passenger side of the intake.

Anyone know which is which?

I'm thinking the larger is the hot going to the heater just looking at the construction of the water pump and my farmboy knowledge of centrifugal pump operation.

Thanks

Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that

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[Message index]

		Heater core, which way does the coolant flow By: RF_Burns on Sun, 10 June 2012 12:37
		Re: Heater core, which way does the coolant flow By: Dennis S on Sun, 10 June 2012 14:02
		Re: Heater core, which way does the coolant flow By: Ken Burton on Sun, 10 June 2012 21:15
		Re: Heater core, which way does the coolant flow By: Dennis S on Sun, 10 June 2012 21:47
		Re: Heater core, which way does the coolant flow By: Ken Burton on Sun, 10 June 2012 22:44
		Re: Heater core, which way does the coolant flow By: Dennis S on Mon, 11 June 2012 10:14
		Re: [GMCnet] Heater core, which way does the coolant flow By: Kosier on Mon, 11 June 2012 10:37
		Re: [GMCnet] Heater core, which way does the coolant flow By: Dennis S on Mon, 11 June 2012 11:03
		Re: Heater core, which way does the coolant flow By: Don A on Mon, 11 June 2012 10:42
		Re: Heater core, which way does the coolant flow By: Dennis S on Mon, 11 June 2012 10:46
		Re: [GMCnet] Heater core, which way does the coolant flow By: USAussie on Sun, 10 June 2012 21:16
		Re: Heater core, which way does the coolant flow By: RF_Burns on Tue, 12 June 2012 06:35
		Re: [GMCnet] Heater core, which way does the coolant flow By: USAussie on Tue, 12 June 2012 07:00
		Re: Heater core, which way does the coolant flow By: Dennis S on Tue, 12 June 2012 08:18
		Re: [GMCnet] Heater core, which way does the coolant flow By: Ken Henderson on Tue, 12 June 2012 09:34
		Re: [GMCnet] Heater core, which way does the coolant flow By: Ken Burton on Tue, 12 June 2012 20:56
		Re: [GMCnet] Heater core, which way does the coolant flow By: Ken Henderson on Tue, 12 June 2012 21:09
		Re: [GMCnet] Heater core, which way does the coolant flow By: glacierfl on Tue, 12 June 2012 22:26
		Re: Heater core, which way does the coolant flow By: Gary Mau on Tue, 12 June 2012 09:22
		Re: Heater core, which way does the coolant flow By: RF_Burns on Tue, 12 June 2012 15:02
		Re: [GMCnet] Heater core, which way does the coolant flow By: mickeysss on Tue, 12 June 2012 17:03
		Re: [GMCnet] Heater core, which way does the coolant flow By: glacierfl on Tue, 12 June 2012 21:43
		Re: Heater core, which way does the coolant flow By: John Heslinga on Wed, 13 June 2012 00:42

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