Quote:
Originally Posted by Tomguy
Your 4.5 should NEVER get to the red. If it gets halfway between 212 and the redzone, I'd shut it off. Pretty sure that's how my old cams got fried (literally). Your fan clutch may not be working. Your radiator probably is scaled to kingdom-come. Your block almost surely has a ton of crud blocking coolant flow. Your water pump fins may be gunked closed or corroded off. Whatever the case is, service that system!!
The fan should come on any time the A/C is on regardless of engine temp, and any time the engine hits 212°F or more. There's a water temp sensor with a 1-prong plug to the right of the air intake mount, as facing the engine. Short this on the (-) (anywhere on the body will do) - if the fan doesn't come on, either your fan fuse is corroded or blown, the relay's shot, or the fan is bad. If it does, this sensor is shot.
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I think the fan clutch is working. I opened the hood and watched it spin.
The radiator was just recored.
The previous owner had a problem with the fan not running, so he re-wired the fan to run whenever the key was on.
I had my mechanic rewire it back to the factor setting.
The fan didn't come on when the a/c was on nor when the temp got past 212.
Does this mean I have a bad fuse?