Low thermostat. Help!!
Posting Guru
Joined: May 2002
Posts: 2,450
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From: Baltimore
It could impact your gas mileage, but more important it means that your Tstat is probably stuck open. If it sticks closed, then it will overheat and you will have bigger problems. Replace the Tstat.
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Joined: Jan 2007
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I just replaced my thermostat last week on my 94 Explorer XLT. It was a little bit of a challenge to get the bolts out but only took me about an hour. I bought my thermostat, gasket and gasket sealant for $11. Picked up a couple jugs of antifreeze and drained all of the old stuff out. I put the new thermostat in and everything sealed up nicely. My temp gauge only goes about half way and never any higher. The heat runs hot and the vehicle warms up fast. Also most places sell two different thermostats rated at different temps. 185 degrees and 195 degrees. I went with the hotter one.
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New User
Joined: Jan 2007
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response to low temp on thermostat?
Originally Posted by marragtop
What year is the Explorer, what motor do you have, and how many miles are on it? A shop may want to do a complete flush of the system as part of the Tstat replacement.
I have a 2000 ford explorer and it has 122, 000 miles on it, I just got must coolant flushed and the mechanic was the one that noticed that it was taken awhile for the thermostat to warm up. Is a complete flush different from having your coolant replaced?
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Joined: Jan 2007
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When I want to do a complete flush I drain all of the coolant out and replace it with water and engine coolant flush. It's a small bottle of a cleaning agent that you put in with water. Then I run the engine for 15 minutes with the heater on full blast. I let the cleaner and the water circulate through everything. Then I let the engine cool down and empty the water and flush. Then I add more water and cycle that through for 5 minutes to try to get most of the cleaner out. It is not too important if you dont get all the cleaner out. It's not harmful to you engine or its performance. Once I am satisfied with the flush. I add the new coolant and water (about a 50/50 mix depending on the season) and enjoy! When I did my thermostat my coolant looked to still be fairly good so I just emptied whatever came out and added new coolant after the thermostat was seated well. I hope this helps.
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Fleet Owner
Joined: Mar 2003
Posts: 24,724
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From: Blue Hill Township
Originally Posted by brintonr
I just replaced my thermostat last week on my 94 Explorer XLT. It was a little bit of a challenge to get the bolts out but only took me about an hour. I bought my thermostat, gasket and gasket sealant for $11. Picked up a couple jugs of antifreeze and drained all of the old stuff out. I put the new thermostat in and everything sealed up nicely. My temp gauge only goes about half way and never any higher. The heat runs hot and the vehicle warms up fast. Also most places sell two different thermostats rated at different temps. 185 degrees and 195 degrees. I went with the hotter one.
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