[[Quick Question: Heater Hoses]]
Joined: Mar 2000
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Large goes to the water pump, small to the intake manifold.
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: [[Quick Question: Heater Hoses]]
Blinded again 
There is no check-valve in the system or core, so either way will work.
The intake is the high-pressure side. The pump is the low-pressure side.
Some 3rd-gen radiators will have the heater return (low-side) going to a port near the top-side of the radiator. I prefer the radiator return route so that the coolant has to go through the radiator and cool before being forced back into the block.
I use a ball-valve on the high-pressure side hose so I can cut the coolant flow through the core during the summer.
There is no check-valve in the system or core, so either way will work.
The intake is the high-pressure side. The pump is the low-pressure side.
Some 3rd-gen radiators will have the heater return (low-side) going to a port near the top-side of the radiator. I prefer the radiator return route so that the coolant has to go through the radiator and cool before being forced back into the block.
I use a ball-valve on the high-pressure side hose so I can cut the coolant flow through the core during the summer.
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From: Hortonville, Wisconsin
Car: 82 Firebird
Engine: Boosted LSX
Transmission: Built 4L60E
Axle/Gears: 4th Gen 3.42s
Re: [[Quick Question: Heater Hoses]]
Blinded again
There is no check-valve in the system or core, so either way will work.
The intake is the high-pressure side. The pump is the low-pressure side.
Some 3rd-gen radiators will have the heater return (low-side) going to a port near the top-side of the radiator. I prefer the radiator return route so that the coolant has to go through the radiator and cool before being forced back into the block.
I use a ball-valve on the high-pressure side hose so I can cut the coolant flow through the core during the summer.
There is no check-valve in the system or core, so either way will work.
The intake is the high-pressure side. The pump is the low-pressure side.
Some 3rd-gen radiators will have the heater return (low-side) going to a port near the top-side of the radiator. I prefer the radiator return route so that the coolant has to go through the radiator and cool before being forced back into the block.
I use a ball-valve on the high-pressure side hose so I can cut the coolant flow through the core during the summer.
Supreme Member
iTrader: (3)
Joined: Nov 2001
Posts: 2,428
Likes: 2
From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Joined: Sep 2007
Posts: 273
Likes: 0
From: Wichita, ks
Car: 84 frankenstein Z28
Engine: 350
Transmission: 700R4
Axle/Gears: 3.73
Re: [[Quick Question: Heater Hoses]]
Interesting, so you can just shut off one side of the heater core and not affect circulation for the rest of the cooling system?
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