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Too Much heat from Nissans radiator?? 700

posted by  Will740turbo on  Thu Feb 14 00:13 CST 2013
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last visit: Wed Oct 22 16:09 CST 2014
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The aluminum-plastic radiators actually work much better to transfer heat away from the coolant than the brass-copper radiators. I could try to explain how, but it's not easy for me to do. Mostly there are more connections and heat is more evenly/quickly spread around the radiator.

Anyway, the fan is always engaged on these - there's a viscous clutch which will disingage partly when it's cold and engage fully when it's warm. The logic is that a hot fan clutch means a hot engine and a cold one means a cold engine.

If the viscous clutch was leaking, I would think that the fan clutch was not working right - probably not engaging enough when it needed to be. The force of the fan blowing will actually blow hot air OUT of the engine bay. A buildup of heat in anything, like the clutch cylinder, is more likely to be because of a bad/slipping/too-slow-to-engage viscous clutch.

I've never seen a fan clutch fail to where it was spinning too much, only to seize up and be 100% engaged all the time.

How did you know it was a heat issue with the hydraulic clutch?

Happy Bricking






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