Joined: Aug 2009
Location: Sunshine Coast, Queensland, Australia
It is normal for the top hose to be hot and the bottom cooler, it is because the hot coolant enters at the top from the engine block. It means your radiator is doing a good job. Have you located the sender in the bottom tank? Just follow the wiring from the radiator cooling fan and it should be connected to it. It sounds more and more like a faulty sender that controls the fan to me.
Aussie 1986 N12 PULSAR 24 years,250000km one owner, still going strong!
Last edited by pulsar86; Sep 22nd, 2009 at 12:27 AM.