Second Generation Camaro Owners Group - Cooling System Information & Restoration

The cooling system is comprised of the waterpump, pump pulley, fan, fan shroud, radiator & hoses.

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Cooling System General Information
The Camaro cooling system is a pressurized liquid system. Radiator cap relief valve opens at 15 psi.

Capacity with heater (standard equipment).
L6 - 12 qts. V8 - 307, 15 qts. Z28 16 qts, V8 - 402, 23 qts.

Radiator Core thickness (inches): L6 - 1.26, 307/350 - 1.26, 402 - 1.98
Frontal area (sq. inches): L6 - 353, 307/350 - 353, Z28 & 402 - 446.

Heavy Duty Radiator (RPO V01)
Core thickness: L6 - 1.26, 307 & 350 - 1.26, 402 - 2.70
Frontal area (sq. inch): 446

Fan:All engine fans have 4 blades, except the Z28, which has 7.
Fan diameter: L6 - 17.61", 307/350 - 17.62", Z28 & 402 - 18.00"
Z28 includes thermo-modulated viscous coupling.

Waterpump Capacity (GPM @ 2000 RPM): L6 - 26, V8 (all) - 23

Waterpump
Waterpump Pulley
Year Part Number Description
1970 - 72 3995646 L6 250
1970 3989305 307 & 350, exc. Z28 and 402 exc. AC
1970 3995631 307 & 350, exc. Z28 and 402 with AC
1970 3995647 350 w/Z28 & 454
1971 - 72 3995647 Z28
Fan (blade Assembly)
Year Part Number Description
1970 - 72 483611 L6 250
1970 - 72 3947890 307 & 350, except Z28 & 402 w/AC
1970 3947772 
1971 - 72 3994044 Z28

fan shroud
radiator

hoses

Cooling System Restoration

When your Camaros cooling system was designed, GM spent a lot of effort and money to make sure the car ran right for a long time. So keep that in mind before you go redesigning things.

Of course, when you increase power, you also increase the amount of heat you must get rid of so you must take a logical approach to improving the cooling system if necessary. The cooling system is designed to take heat FROM the engine and get rid of it by having the hot water be cooled by air at the radiator.


Last updated: 10/20/2011
Author: MadMike Maciolek

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