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Old 10-31-2012, 06:19 AM
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Low ECT temps...??

I have tried to look this up but I couldnt seem to find someone with my exact problem. Anyway,
When driving down the highway at 70mph for over 45 minutes my ECT's never got over 186 but usually stayed at 184. Shouldn't it get to at least 190? Whats the deal. Plus its only 60F
Bad thing is my EOT is at 200-205
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Old 10-31-2012, 06:54 AM
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Mine was the same way, thermostat was worn out. I changed it, it runs at 190-194 now. Change it and recheck your deltas, they probably won't get any better though.

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Old 10-31-2012, 08:01 AM
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What do you mean they wont get better? If I replace the ect sensor shouldnt the delta get better
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Old 10-31-2012, 08:15 AM
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Originally Posted by ConJohnRobTx View Post
What do you mean they wont get better? If I replace the ect sensor shouldnt the delta get better
Well if the coolant temp rises, and you are assuming that will improve the heat transfer through the oil cooler.........then your deltas will improve. I'm suggesting your oil temps will increase slightly also.

Edit: you are saying ect sensor, I said thermostat. Why are you talking about the sensor?

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Old 10-31-2012, 08:21 AM
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Sorry I meant thermostat. But thanks for your help. Is it hard to change out the thermostat? I'm still a little new to all this.
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Old 10-31-2012, 08:24 AM
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Originally Posted by ConJohnRobTx View Post
Sorry I meant thermostat. But thanks for your help. Is it hard to change out the thermostat? I'm still a little new to all this.
No it's not too bad, just takes a little time. Use the motorcraft part, mine looked pretty worn out.

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Old 10-31-2012, 08:33 AM
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You can get the whole Motorcraft assembly from ford for around $20. It comes with the housing, thermostat, and gasket. Its not hard at all to change. I can posts some pictures if that will help.
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Old 10-31-2012, 10:16 AM
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Originally Posted by mazsecond View Post
You can get the whole Motorcraft assembly from ford for around $20. It comes with the housing, thermostat, and gasket. Its not hard at all to change. I can posts some pictures if that will help.
Please help! I have looked and I dont know if I am mentally slow or what but I can figure out exactly where the ect sensor is.
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Old 10-31-2012, 11:52 AM
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Quote:
Originally Posted by ConJohnRobTx View Post
Please help! I have looked and I dont know if I am mentally slow or what but I can figure out exactly where the ect sensor is.
It is called the thermostat not the ECT Sensor...

It is located right underneath the cold side CAC (boost) tube and attaches to the upper radiator hose.

Here are some pictures for clarification:

The thermostat is located right under the grey colored pipe (CAC Tube) and is attached to the end of the black radiator hose that goes from the radiator to the engine.



Here is another angle from the top of the engine. It is right next to and below the Fuel Pressure Regulator, below the grey CAC tube.



Here is a closeup of the thermostat itself. It is the metal housing with 2 bolts holding it on.



Step-By-Step

1. Remove degas bottle cap to relieve any cooling system pressure.

2. Put a clean 5 gallon bucket under the truck under the pet**** on the radiator. Drain via the pet**** until it stops, about 3-4 gallons should come out.

3. Remove air intake assembly.

4. Remove CAC tube. Their are 2 clamps...one on the intake elbow and one on the intercooler (under the intake).

5. Remove upper radiator hose. Their are 2 clamps one on the radiator and one of the thermostat.

6. Remove the thermostat. Their are 2 bolts that hold it in place. It may take some wiggling to get it out.

7. Install new thermostat. (ford PN: 4C4Z-8575-AA)

8. Reinstall upper radiator tube, CAC tube, and intake.

9. Refill cooling system with what was drained out.

10. Start and check for any leaks.

Note: Make sure to tighten the clamps that hold the CAC tube on nice and tight or the CAC tube will blow off once you build some boost. I don't know what the torque spec is on them but get it good and tight without cracking the tube.

This is a very easy job to do. Should take about an hour. If you have any questions or need any clarification feel free to ask.
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Old 10-31-2012, 04:05 PM
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I will definitely try to tackle that next week sometime. Thanks for all the help! Glad to know there are people out there willing to help for those of us who aren't quite there yet with knowledge and skill.
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