Subaru 1 3 Bar Radiator Cap

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Subaru 1 3 bar radiator cap.

The cap increases pressure and does allow temperature to go up about 10 degrees before fluid boils but does not reduce temperature. The higher temperature allows the cooling system to absorb more heat. For example you would run a 1 3 bar cap on the radiator and a 1 1 bar cap on the turbo tank. The turbo tank needs the lower pressure cap since its job is to overflow the coolant into the overflow tank then after shutdown it will suck it back in.

Avoiding boiling makes head gasket failure less likely. 1 1 bar vs 1 3 bar radiator cap posted in general. I have read a few topics here and there all over the internet with advantages and disadvantages but most have been heresay and there arent many facts to back up what people have posted about in their. Use the 1 1 bar coolant reservoir cap for the coolant expansion tank which sits atop the intake manifold on every turbocharged subaru we support.

You are suppose to run the higher pressure on the radiator. The 1 3 bar radiator cap will improve the cooling efficiency on the subaru wrx sti. After diagnosing my overheating problem which seemed to have been caused by a busted valve in my radiator cap i am now needing a new one. And only if you have an aftermarket.

Cosworth 1 1 1 3 and 1 5 bar high pressure radiator cap.