What temperature?

[wbute]

True, Axistr, the cap will lift boiling point too. The reason I say 100 is too hot, you can run a tractor at full load all day in the summer, with a capillary tube temp gauge, if the cooling system is correct, it will not go over about 92. 100 is way too hot. There is a problem either with your remote gauge or the cooling system.

[axistr]

True, Axistr, the cap will lift boiling point too. The reason I say 100 is too hot, you can run a tractor at full load all day in the summer, with a capillary tube temp gauge, if the cooling system is correct, it will not go over about 92. 100 is way too hot. There is a problem either with your remote gauge or the cooling system.

I agree and the HQ-HZ were designed to run between 85-95 with a 82 thermostat. Its interesting that when the VN commodores were introduced they used a 92-94 thermostat and the computer didn't trigger the low speed electric fan till 102 degrees. The thermostat opening temperatures gradually increased after the HZ trying to reduce emissions. I don't agree with the temps that the later cars run at but its uncommon to see cars broken down on the hwy and overheating these days.

[b-rock-05]

Hi all and happy new year, does anyone have an opinion on waterless coolants,and if this would help these problems ?

[Innuendo]

Hi all and happy new year, does anyone have an opinion on waterless coolants,and if this would help these problems ?

Waterless coolants have a higher boiling point and would help. The main reasons for overheating basically come down to: Blockage, Malfunctioning/Incorrect Parts, Cavitation and Air Flow.
Cavitation is air in the system as a result of not being bled properly (fill point or bleed hole should always be at the highest point of the cooling system). An impeller rotating too fast can be detrimental. I.E a incorrect water pump pulley.

Things to check:
Thermostat opening at correct temperature.
Thermostat is not installed upside down.
Water disappearing under higher revs with radiator cap off. (Hold revs and fill, replace cap)
Hot spots in radiator core - blockage.
Open heater taps when filling radiator and bleeding system.
Water in engine oil? Blown head gasket, cracked head.
Leaks.
Steam out exhaust pipe - Blown head gasket, cracked head, manifold corrosion, crack or gasket seal fail.

A radiator cowling (like a thermo/engine fan) only work at lower speeds I.E in traffic. Open road air speed will surpass cowl and fans.