Coolant temps way low... - Ford Powerstroke Diesel Forum
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post #1 of 14 Old 10-01-2010, 01:17 PM Thread Starter
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Coolant temps way low...

I drove to work this morning and it was not cold by any means, but it was a cool 55* and it took 30 miles on the highway before my coolant ever hit 180 and that was actually after i got off the highway and came to some stop and go city traffic. The truck has 65k miles on it so i can't imaging the thermostat has coroded and stuck open but i suppose its possible. Anyone else have issues like this? I was also told the theremostat on these was a bear to change? Is that the case?

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel



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post #2 of 14 Old 10-01-2010, 01:23 PM
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Yeah it shouldve been in the 180-200 range after about 10 miles of driving. Not sure on the Tstat though.

Follow the upper radiator hose

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post #3 of 14 Old 10-01-2010, 04:41 PM Thread Starter
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Originally Posted by Dave View Post
Yeah it shouldve been in the 180-200 range after about 10 miles of driving. Not sure on the Tstat though.

Follow the upper radiator hose
Yeah I know what the temp should be and when ...lol thanks though.

There's more than one thermostat in these 6.4s

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel




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post #4 of 14 Old 10-02-2010, 04:51 AM
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I think there is only 2

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post #5 of 14 Old 10-03-2010, 05:12 AM
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The t-stats are a little difficult to change. You might want to look at the routing for the V3, I'm sure nothing was done different, but make sure it's not bypassing the t-stats and loosing heat.

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post #6 of 14 Old 10-04-2010, 09:55 AM Thread Starter
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The t-stats are a little difficult to change. You might want to look at the routing for the V3, I'm sure nothing was done different, but make sure it's not bypassing the t-stats and loosing heat.
No, this was happening early spring also, before the V3 install when it was still cold up north. On the way to OR across WY it was snowing and the coolant temp stayed about 170 at best...less sometimes. That was with a cold blowing headwind and temps around 30.

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel



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post #7 of 14 Old 10-04-2010, 04:04 PM
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whats your oil temps? same as water?

also both thermostats are in the timing cover where the upper hose runs from the radiator. if you still have the EGR coolers I believe you have to remove that then the 4 bolts that hold the housing on to the timing cover. its not horrible to remove once you get that stupid cooler off.
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post #8 of 14 Old 10-05-2010, 02:33 PM Thread Starter
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Yes egr cooler is there... Sounds like a pitta.
I'll have to check oil temps next time.

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel



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post #9 of 14 Old 11-16-2010, 09:09 AM Thread Starter
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Ford replaced both thermostats under warranty... they were "F-ed up good" according to the Tech. 195* coolant now...

2003 6.0 F350 dually on high cholesterol fuel (WVO)
2000 7.3 Excursion also on a high cholesterol fuel



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post #10 of 14 Old 11-16-2010, 09:12 AM
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At least they were "F-ed up" open, instead of closed and over heated

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