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How is a heater core "supposed" to sit?

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Mac42

Member
Joined
Dec 18, 2000
I saw a comment in another post about car heater-cores working better when sitting at a certain angle... anyone know what that angle is? Right now mine is sitting on it's face (flat) and has been doing fine, but I just connected my GeForce3 to the system and wanted to securly mount the radiator before plugging the hoses back in. If it's supposed to sit on one of its sides then are the hose nipples supposed to be on the top, bottom, or one of the sides?
 

Thelemac

Administratively Deficient
Joined
Mar 15, 2001
It doesn't matter as long as how it sits allows plenty of air to go through it.

It just doesn't make sense as to how something that has water *pumped* through its pipes with air being *forced* over to it make it matter how it is situated...as long as you consider proper airflow and other unrelated-to-how-the-radiator-performs-by-itself things.
 
W

William

Guest
i think it would matter somewhat. if you mount it vertically put the inflow at the top and the output at the bottom. Not going to be a huge difference, but every little can help.
 

Spewn

Registered
Joined
May 1, 2001
Car heater cores are much different(and better) than online radiators such as the DD cube. They have resevoirs on the sides, and TONS Of tiny little tubes that the water is forced through by high pressure. The reason for the resevoirs is it allows warmer water to rise to the top, and make more passes through the pipes before being pumped out the bottom. If you seat the radiator so that the input/output are at the same level, you negate this effect.
 
OP
Mac42

Mac42

Member
Joined
Dec 18, 2000
So which is supposed to be higher.. the input or the output... does it matter as long as they are at different levels?
 

Ridenow

Sneaky Moderator
Joined
Apr 17, 2001
Location
Springfield, IL
The input is supposed to be lower. This is so you do not have a trickle running though. If the input is lower it fills the radiator forcing the air out the top. When the air is removed have water touching as much of the radiator as possible for better thermal transfer.