Heater Hoses Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

pritch · 03-17-2005, 12:08 AM

On my Panel, with it's 230 I6, My return line from the heater has a 'Tee' in it and one line goes back to the motor @ the thermostat housing and the other goes into a factory-looking fitting at the top of the radiator. Is this normal? I've not ever seen another rad. with this hose fitting on it. The rad. is normal looking in every other way.

Longhorn Man · 03-17-2005, 12:30 AM

i've seen them both ways..I think it had somethign to do with a/c verses non a/c.
You sure that's a 230 in there? If it is original, then it'll be a 250 or a 292. No 230's came in 67 - 72 trucks.

pritch · 03-17-2005, 12:39 AM

Yeah-it's a defacto 230. Some clown put a 230 crank and pistons in a '75 250 block.

I had a heck of a time figuring that out. It's just a temp. motor until the 327 gets done. Gonna be hard to give it up, though, it gets 20 MPG. So do I need that 2nd return line? And should I keep the one that goes to the rad. or the motor? The fitting on the motor would be easier to plug.

Brainchild · 03-17-2005, 01:56 AM

I'm sure it'll work either way.The newer trucks have the return going to the rad, and no problems.I'd plug the one on the motor.

JimKshortstep4x4 · 03-17-2005, 08:38 AM

The service manual states that the return hose is to be hooked to the radiator if the truck is a v-8 with automatic transmission. Someone has added the tee and extra hose.

My radiator repairman tells me that if you have AC the return hose should go back to the radiator.

Jim

03-17-2005, 12:08 AM	#1
pritch Registered User Join Date: Mar 2004 Location: Hoytsville, Utah Posts: 3,365	Heater Hoses Question On my Panel, with it's 230 I6, My return line from the heater has a 'Tee' in it and one line goes back to the motor @ the thermostat housing and the other goes into a factory-looking fitting at the top of the radiator. Is this normal? I've not ever seen another rad. with this hose fitting on it. The rad. is normal looking in every other way. __________________ '68 Panel Project Boogie Chillin' '68 C-10 Ol' Green

03-17-2005, 12:39 AM	#3
pritch Registered User Join Date: Mar 2004 Location: Hoytsville, Utah Posts: 3,365	Yeah-it's a defacto 230. Some clown put a 230 crank and pistons in a '75 250 block. I had a heck of a time figuring that out. It's just a temp. motor until the 327 gets done. Gonna be hard to give it up, though, it gets 20 MPG. So do I need that 2nd return line? And should I keep the one that goes to the rad. or the motor? The fitting on the motor would be easier to plug. __________________ '68 Panel Project Boogie Chillin' '68 C-10 Ol' Green

03-17-2005, 01:56 AM	#4
Brainchild Still drivin' a Rat Rod Join Date: Sep 2004 Location: Monett Missouri Posts: 4,925	I'm sure it'll work either way.The newer trucks have the return going to the rad, and no problems.I'd plug the one on the motor. __________________ Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the a$# 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website

03-17-2005, 12:30 AM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	i've seen them both ways..I think it had somethign to do with a/c verses non a/c. You sure that's a 230 in there? If it is original, then it'll be a 250 or a 292. No 230's came in 67 - 72 trucks.

03-17-2005, 08:38 AM	#5
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	The service manual states that the return hose is to be hooked to the radiator if the truck is a v-8 with automatic transmission. Someone has added the tee and extra hose. My radiator repairman tells me that if you have AC the return hose should go back to the radiator. Jim



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