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Awhile ago i was reading on here about how to keep your motor cool when driving around in summer as it can get damn hot here.. i cant find the thread now thats why im making a new one about it but someone said something about getting some material from Clark rubber and putting it under the hood of the car and it blocks out heat.

I have a r33 gtr and wana keep it as cool as i can this summer

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https://www.sau.com.au/forums/topic/301659-coming-in-to-summer/
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Your engine doesn't give a stuff about radiant heat from the bonnet.

Keep the cooling system performing as well as possible and it will take care of itself. Make sure the radiator is good, the coolant is under 2 years of age, the water pump is good, all rubber hoses are in good condition and the viscous clutch fan roars when revving the engine if the outside temperature is above 30 degrees.

Make sure the stone tray is mounted in the correct place - this helps cool the front diff as well as push the hot air from the radiator as far away from it as possible to prevent hot air recycling through the radiator intake.

I've seen things that make me laugh though - I've seen people mount the bonnet up a few CM at the rear to help hot air exit, I always wonder if the bonnet will go through the windscreen and decapitate the front driver/passenger in a frontal accident......

having the bonnet up a bit higher at the back isn't quite as stupid as it sounds. it lets air flow much more freely through the engine bay. this doesn't help cool the engine because of ait flowing over it, but it does allow air to flow more freely through the radiator. as for it coming off in a crash and injuring someone, there is just as much chance of one in a stock location doing the same thing as one that is lifted up a touch as they are still only held on by the same mounts.

as for making sure the car runs at the proper temp, if you are at all concerned, make sure you have an aftermarket water temp gauge so you can see exactly what the temp is (unless the GTR already has one that shows the temp in either celcius or farenheit). that is the first thing. if it appears to run a bit hotter then start with the simple things like getting the radiator prefessionally cleaned. this doesn't mean getting a flush done on it, it means having the end tanks removed and the core cleaned out as it is supprising how much crap can build up in them and no amount of flushing will get it out. you can go and replace all the other parts like the thermostat and water pump, etc, but if the radiator isn't able to do its job properly then you will still have cooling issues.

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