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Old 01-25-2014, 11:12 AM
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Coolant question

Hey guys..new here and to diesels..so need some help. I picked up a 97 F250 7.3 229k miles, runs great. One thing I noticed while making the 1hr drive back home the coolant guage didn't really budge off C. Also I was getting terrible gas mileage almost a qtr of a tank to drive 49 miles

So I figured a new thermo was in store..

I bought one (195 degree) and slapped her in...the truck still ran very cool. I took the truck around the block and got the guage to get the in normal range but it was sitting on the N so still near the C. I come to find out I pulled out a 203 degree thermo which I have read is better to run. But I a not sure if this was bad or not..,

I tested the 203 degree in boiling water on the stove and it seemed to function properly. M


My question is this...was the old thermo bad? And with the new thermo Is it working correctly bc the guage is at least in "normal"

Is there a way to test the guage??

The temps are fairly cool in in ga. Probably mid 30's. any help would be greatly appreciated

Next topic was fuel mileage anything I should do to help increase the fuel mileage? Truck is stock and seems to be well cared for..just horrible gas mikeage almost a half a tank in 60 miles

Fuel filter?? What should I check

Last question is I have the water in fuel light..seems the sensor is bad..where can I locate this to fix? Thanks

k
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Old 01-25-2014, 12:54 PM
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These trucks don't get ANY "gas" mileage....

Ignore the fuel gauge for mileage. Fill the tank, reset the trip odometer, drive it down to 1/4 tank, refill, divide the distance on the trip meter by the amount of fuel needed to refill.
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Old 01-25-2014, 01:05 PM
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Are both the upper and lower rad hoses roughly the same temp by feel? Also is the heater blowing hot?
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Old 01-25-2014, 03:30 PM
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Quote:
Originally Posted by mcdaniel1991 View Post
Are both the upper and lower rad hoses roughly the same temp by feel? Also is the heater blowing hot?

No they are not. The top is cooler, but yes the heat is hot..it could be hotter.
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