necessity of having a nismo thermostat

[projectRDM]

Originally Posted by Bigsyke

Does the thermo even open durring winter when the heater is blowing?

I would hope so, otherwise you don't have any heat.

[Bigsyke]

Originally Posted by g6civcx

The heater has nothing to do with coolant temp. There is nothing preventing you from blasting the heat when the engine is cold, and getting no heat.

Do we understand the theory behind the cooling system and how the thermostat regulates coolant flow?

Originally Posted by projectRDM

I would hope so, otherwise you don't have any heat.

But wait ive got a solid copy of the KA24DEs coolant route, and it goes to the heater core 1st.

Your telling me in -10*f weather blasting the heater isnt going to reduce the coolant temp? I could sit there while I bleed my coolant system, watch the engine coolant temps, yes I get a reduction when I engage my heater blower motor on 3-4.

Trips on the highway in this freezing weather I can pull over and pop the hood, and the water neck/radiator/lower radiator hose is ice cold. I let it idle and then the above warm up.

- Water pump creating the source of pressure......Have you bled a coolant system before? I dont see the water start to expand for about 10 minutes.

- Thermostat regulates pressure....How is this done when there is a hole or jiggle valve? Some Tstats dont even come wtih the valve anymore.

-And for those who said you wil run cooler with the t-stat, Yes with pure water and WW, only because it can transfer heat alot better than 50/50, even then your running a risk of warping the block because who knows how chilled the water going into the head is, when it spends very little time in the radiator being chilled. Plus if your constantly at 5krpms how do you know how fast the water is being circulated. Your just circulating hot water/coolant around the engine and pretty much making the radiator horribly inefficient.

Thats my take on it anyway.

[g6civcx]

You originally said:

Originally Posted by Bigsyke

Does the thermo even open durring winter when the heater is blowing?

Then you said:

Originally Posted by Bigsyke

Your telling me in -10*f weather blasting the heater isnt going to reduce the coolant temp? I could sit there while I bleed my coolant system, watch the engine coolant temps, yes I get a reduction when I engage my heater blower motor on 3-4.

Your original statement is unclear.

You can start a cold engine and blast the heater. The engine will take a very long time to come up to temp. This is why I always say don't blast the heater until coolant temp has stabilised.

The heater core is a secondary radiator. You can blast the heat to reduce engine overheating. We know this.


I am not sure if you can prevent the engine from coming to temp completely by blasting the heat, even in -10*. Eventually the engine will warm up. The heater core isn't big enough to overcool the engine.