[JWahlsten]

yes, your fans should run on high speed with the A/C on. If you're car is up to temp, I believe they will go from high to low speed when the car is turned off too...I'd have to check the workshop manual to confirm.

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[Cloud9...68]

Thanks for confirming. I didn't have a chance to check my fans' high speed operation last night - hopefully I'll be able to do it tonight. My cooling system is definitely struggling to keep up under high load (e.g. full throttle acceleration) conditions. I'm hoping it's as simple as a bad fan switch.

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[Qfrank]

I just went through this the last couple of weeks. Car was creeping up towards 10:00oclock and beyond, and it never did that prior.



Drained it, water wetter, 50/50 mix, new radiator cap, thermostat, and low temp fan switch.

Fans were working fine before, i just thought it easier to remove radiator to inspect and clean.

Tested old thermostat afterwards and it seemed to work ok, so i suspect the radiator cap, inside rubber seal was toast, so maybe was not holding pressure.



Either way, i did it all one time and done, as to hit the reset button with those problem areas.



It is in the 90's here and high humidity, stays around the 8-9oclock mark, and fans working fine.

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[Cloud9...68]

Thanks for the summary - this kind of info is very helpful when troubleshooting a problem. Unfortunately, I've already done all those things, including the overflow tank cap. I haven't tried water wetter - I'll do that as a last resort, after I've confirmed everything is working as it should.



Also, mine also stays around 8 - 9 oclock, even in traffic at the hottest time of the day, as long as I drive it "normally."



Do me a favor - next time you drive it, during the hottest time of the day, find a clear stretch of road, floor it, taking it up to red line, ease off the throttle (or brake lightly) until the revs drop down to about 2500 rpm, and floor it again. Repeat about a half dozen times. I did this on Monday, trying to replicate conditions my car would see on the track. This caused my gauge to get to around 10 oclock, which concerns me, as this was actually a pretty light simulation of what the car would see at the track. But I'd be very curious how yours behaves under the same type of driving, after all the work you did. Anyone else who lives in a warm climate (preferably over 100 degrees F), feel free to run this little test as well. I'd be very curious to see how my car compares to others. Thanks.

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[flash]

realize that 10:00 is only 212 degrees F. while that may seem high on the gauge, it isn't high in temp in arduous conditions like track. i've not had it get there yet, but i wouldn't freak out if it did occasionally, as long as it didn't get higher, and came back down.

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[Cloud9...68]

Thanks, Flash. As with the noise from the back that I thought could only be a dying pinion bearing, it's entirely possible that the behavior my car's temperature gauge is demonstrating could be well within the perfectly normal range. I just want to thoroughly check to make sure everything is working as it should before I take it to the track, especially in August in central Texas. A little paranoid, I guess...

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[Remotecontroller]

Hey Cloud - can I give you a call? Tried to message you through site here but the site says you can't recieve new messages. I have cell and work # from back in Dec.



Ken (here in Austin with the black vert).

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[Cloud9...68]

Sure, call me anytime. I'm not always near my phones, so feel free to leave me a message. It's weird that the site is telling you I can't receive new messages - I've recently exchanged messages with another member with no problems.

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[fleetwood]

Can the fan switch be replaced without draining the radiator?

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[flash]

not really. it's certainly going to make a mess if you try. you can't really even get to it without removing the fans either.



besides, the coolant should be changed every 2 to 3 years anyway, and most of these cars are long overdue for that. remember to use phosphate free coolant, and distilled or deionized water only.

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[fleetwood]

Schiza -- thanks -- yeah, had a new radiator/hoses/pump/t-stat put in about 6 months ago (and also replaced the relay)



before the radiator needed replacement, it was always dead on at 8 o'clock.

Ever since the new radiator -- in traffic, it goes just south of 10 o'clock before fans kick on and bring it back down to 8..

Tried a new relay -- still the same.



fan switch is the only thing that hasnt been replaced...so that's got to be it (hope)

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[flash]

before you do that check and clean the ballast resistor connectors.

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[fleetwood]

will do - thanks

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