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Hey guys just wondering should i be worried around 3 months ago i installed a koyo radiator with stock standard radiator cap the temp on my pfc showed 79-80 degrees when warmed up but 3 months ago i installed a ARC radiator cap and the temp never raises past 65 degrees its even lucky to see 65 degrees so im just wondering should i revert to my standard radiator cap? or just leave it? im not loosing any coolant

Cheers

Chi

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did it only go up to 65 degrees from the moment you put it on? or has it only just started staying that low? if it has only justed then it will probably be your thermostat. if it started that the moment you put the new cap on the put the old one back on.

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Aftermarket caps on a stock rad are a very bad idea.

The problem is most aftermarket caps have a much higher point of pressure.

This means if you do actually overheat the cap wont pop off when it should, and what will happen is the radiator header tank which is plastic - will simply blow apart and send bits flying everywhere at a very much higher pressure than was ever intended

I remember this happening when i was in Pete's (bass junky) car, and it put a good 2-3 solid dints into the bonnet which is some rather nasty damage and quite costly to fix for just changing a cap.

Since that day i will never change from a factory rated cap (or replacement) on a radiator that is not full alloy.

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thanks for the reply R31nismoid but the radiator is a KOYO aftermarket one ahh well tonight i put the stock cap back on and max temp was like 65 so im guessing its the thermostat could it be ne thing else? guess its a good time to upgrade to gates radiator hoses + nismo thermostat

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mine sits on 84 at the moment but its leaking coolant via the water pump which will soon be replaced.

I have a fully sick Spac rad cap which has a nipple attached to a hose running down the engine bay and a nifty button to release pressure before opening. Yeah I know you're jealous of it :P

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The r32 gtr i just bought sits on about 79-80 degs just like yours once its warmed up, mine runs a blitz radiator cap and im not to sure but i dont think its the factory radiator is this a good temp it should be running at?

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