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Assuming your cooling system just sucks and your head gasket and everything else is in good shape you need to follow my exact instructions and you will solve your cooling issue forever.
1. if you are sticking with electric fan make sure you are using one that flows at least as much CFMs as a stock Nissan Altima fan, or you can use two of these b14 fans they work great.
2. Try a PWR radiator. It is smaller in thickness than the Koyo or the other makes but it works MUCH Better. The reason why is because it is a TWO PASS radiator. Which means that the coolant passes through the core twice in the same time it sits in a regular Koyo. This mean the coolant stays in there longer and gets more AIR TIME to release heat to the air.
3. MOST IMPORTANT TO HELP - Swirl Pot. BUY ONE. you need to invest in a swirl pot. It basically is a constant bleeding system for your cooling system.
Its only about 90 bucks from Greddy and instal is very simple, the kit comes with everything. If you search for Swirl Pots there is a thread that Dousan did and also a write up that I did a long time ago - but it's in the premie section.
This will make the biggest difference of all and is a very cheap and good additon to add especially if, in your case, its some sort of air in the system issue.
This will keep your idle at the right spot and air out of your cooling system eliminating hot spots and keeping the car cool even after some serious track time.
Cheers
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