Temperature fluctuating - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 07-28-2004, 12:14 PM Thread Starter
esm
 
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Temperature fluctuating

Hi,

I had to replace the Radiator in my 96 Bronco and now the temp gauge constantly moves between the N and the the M of "NORMAL". The radiator is filled to the top. Any ideas why this is happening?

Thanks,

Ed
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post #2 of (permalink) Old 07-28-2004, 04:41 PM
 
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Re: Temperature fluctuating

Sounds like the thermostat could be causing it. It is closing when it gets to N and reopens at M. Did you replace it?
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post #3 of (permalink) Old 07-30-2004, 01:34 PM Thread Starter
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Re: Temperature fluctuating

No, I did not replace the thermostat. The problem is that sometines to gauge seems to get stuck beyond the L for a while and then it falls back to the N. All that happens within a couple of seconds. Does anyone know which temparature range the gauge is displaying as NORMAL?
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post #4 of (permalink) Old 07-30-2004, 03:45 PM
Shilo
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Re: Temperature fluctuating

No, that's exactly the problem, there's no way of knowing exactly what the letters mean, and I don't believe they're consistent from one truck to the next. I could tell you what they approximate to on my '90, but I don't think it would be the same for another '90, much less a '96 where the gauge is entirely different.

My suggestion to you is to install a real gauge, I prefer mechanical but electrical will work, too. A gauge with numbers. What a concept.
post #5 of (permalink) Old 07-30-2004, 04:25 PM
 
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Re: Temperature fluctuating

Change the T stat first. They are cheap. It sounds like yours is sticking.
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post #6 of (permalink) Old 07-30-2004, 05:57 PM Thread Starter
esm
 
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Re: Temperature fluctuating

I got me a thermostat and I'll install it over the weekend. Will let you guys know the result.

Thanks a lot!
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post #7 of (permalink) Old 08-01-2004, 04:01 PM Thread Starter
esm
 
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Re: Temperature fluctuating

Just checked the stat against the Haynes Manual and it appears that Autozone sold me the wrong one. I probably have to get an original at a Ford dealership. I'll keep you posted.
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post #8 of (permalink) Old 08-02-2004, 03:50 AM
 
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Re: Temperature fluctuating

If it's 190-195 you should be fine.
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post #9 of (permalink) Old 08-02-2004, 04:00 AM
 
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Re: Temperature fluctuating

I highly recomend buying a Prestone flush/fill kit. And flushing it out real good and replacing the coolant. i had the same problem and flushing my radiator fixed it. If its not the problem it can't hurt anything. Ahh hell I just noticed where you had changed the radiator.... Still not a bad idea to flush the system incase your heater-core is half stopped up..
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post #10 of (permalink) Old 08-02-2004, 10:32 AM Thread Starter
esm
 
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Re: Temperature fluctuating

I don't mean the temp, I'm talking about the design of the stat. According to the manual, there is an "acceptable" and "not acceptable" design.
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