Engine coolent temp
Lead Driver
Joined: Oct 2010
Posts: 5,420
Likes: 16
From: Ouray, CO
The test is only valid when the engine is fully warmed up @ hi-way
speeds (70 - 75 MPH) flat ground NOT towing.
The ECT should be 190* which indicates the t-stat is working properly.
If the EOT is 205* then you have a 15* delta and the oil cooler
is likely plugged partially. If the ECT never warms up, then the
test is not valid and the t-stat needs to be replaced.
When towing, or going up a mtn the temps will get hotter and
delta get wider that isn't an issue.
speeds (70 - 75 MPH) flat ground NOT towing.
The ECT should be 190* which indicates the t-stat is working properly.
If the EOT is 205* then you have a 15* delta and the oil cooler
is likely plugged partially. If the ECT never warms up, then the
test is not valid and the t-stat needs to be replaced.
When towing, or going up a mtn the temps will get hotter and
delta get wider that isn't an issue.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 26
From: Middle Tn.
The test is only valid when the engine is fully warmed up @ hi-way
speeds (70 - 75 MPH) flat ground NOT towing.
The ECT should be 190* which indicates the t-stat is working properly.
If the EOT is 205* then you have a 15* delta and the oil cooler
is likely plugged partially. If the ECT never warms up, then the
test is not valid and the t-stat needs to be replaced.
When towing, or going up a mtn the temps will get hotter and
delta get wider that isn't an issue.
speeds (70 - 75 MPH) flat ground NOT towing.
The ECT should be 190* which indicates the t-stat is working properly.
If the EOT is 205* then you have a 15* delta and the oil cooler
is likely plugged partially. If the ECT never warms up, then the
test is not valid and the t-stat needs to be replaced.
When towing, or going up a mtn the temps will get hotter and
delta get wider that isn't an issue.
Posting Guru
Joined: Apr 2008
Posts: 2,392
Likes: 1
From: Green Lane, Pa.
Temperature spread would depend on truck being empty, loaded, speed, and outside temperature. As an example, right now where I live which is a cold climate driving 45-50 mph. level and empty I see a spread of 2 degrees. If I do 70 I will see a 5 deg. spread. In the summer 45-50 mph I will see a 5 deg. difference empty, and at 70 a 8-9 deg. difference.
