V10 Scangauge ???
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Laughing Gas
Joined: Jun 2011
Posts: 1,223
Likes: 89
From: TN
I did take it down the hwy after putting the new tstat in. I set cruise on 80, AC on and the road had some long grades. Temps never exceeded 215 and quickly returned to the 207-209 range after climb was over.
I will be taking a trip today with my 16' trailer to pick up (3) 4 wheelers for my boss, so we will see how it goes.
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
Think you may have a bad temperature sensor.
After sitting all night you should check the temperature reading before starting the truck. It should be within a couple degrees of ambient temp.
After sitting all night you should check the temperature reading before starting the truck. It should be within a couple degrees of ambient temp.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
Ok. I changed the thermostat 192° yesterday and it had some damage to the bottom of it. The copper that is rolled over the flat washer, half of it was gone. I did see remnants of it in the bucket I drained the radiator into. Temps are holding around 207-211. I inspected the outside of the coolers and they are clean. After speaking to the service guy again, he assured me those temps are normal. I do think I will have the system flushed next week for piece of mind.
sounds like the system is in need of service. You might want to check the
coolant to see if it has gone acidic. But what ever you do sounds like a full
flush is in order.
Sean
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Laughing Gas
Joined: Jun 2011
Posts: 1,223
Likes: 89
From: TN
I drove about 200 miles yesterday and had my 16' trailer in tow. Running at 75mph with the AC on, temps were 207-209 on flat road and 211-215 on hills. On the return trip, i had (3) atvs and still had same temps. Ambient temp was 90-91.
Last night i went to return a few movies and took the truck. Ambient temp was 81-82. The water temp without AC on was around 215-216. If i accelerated to get on the interstate, temps would rise to 218. Turned the AC on and temps come back down 207-209. ???
I am going to take to the local ford service dept and let them do a coolant flush next week. Then see what happens.
Last night i went to return a few movies and took the truck. Ambient temp was 81-82. The water temp without AC on was around 215-216. If i accelerated to get on the interstate, temps would rise to 218. Turned the AC on and temps come back down 207-209. ???
I am going to take to the local ford service dept and let them do a coolant flush next week. Then see what happens.
Super Moderator
Joined: Aug 2003
Posts: 25,479
Likes: 742
From: Isanti, MN
I don't think you understood what I was asking.
After a cold soak your engine should be right around ambient temperature. So if the truck sits all night and it's 60° out in the morning, your engine coolant temperature should be within 58-62°. If your ECT is reading 75° in this situation, you know you have a bad sensor. You can use other sensors such as transmission temp and ambient air temp to correlate your values with. They should all be very close.
The fact that your temperature readings are staying within a tight range when running indicates your cooling system is functioning correctly. Temps after a cold soak would be the smoking gun needed to diagnose your sensor as being faulty.
After a cold soak your engine should be right around ambient temperature. So if the truck sits all night and it's 60° out in the morning, your engine coolant temperature should be within 58-62°. If your ECT is reading 75° in this situation, you know you have a bad sensor. You can use other sensors such as transmission temp and ambient air temp to correlate your values with. They should all be very close.
The fact that your temperature readings are staying within a tight range when running indicates your cooling system is functioning correctly. Temps after a cold soak would be the smoking gun needed to diagnose your sensor as being faulty.
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Laughing Gas
Joined: Jun 2011
Posts: 1,223
Likes: 89
From: TN
Tom, I saw your question and was just now able to see what the temps sensors are reading. Ambient air is 78, Tranny temp is 80 and water temp reads 87. So, I think through your investigation method, I may have a bad sensor. Thanks for the help. Still going to do a flush for piece of mind.
Fleet Owner
Joined: Apr 2012
Posts: 27,307
Likes: 549
From: Spanaway
parts of the thermostat. I think you have the right idea on the flush. Let
them know that you found parts in the bucket after you did the drain to change
the thermostat.
Sean
