4.6 over heating - Mustang Evolution

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Old 05-10-2013, 11:02 AM   #1
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4.6 over heating

My dads 02 steeda is still over heating after he just rebuilt the whole engine brand new 0 miles. He put in an upgraded thermostat to keep it cooler. My friend has a 96 4.6 l and his was over hearing Untill he took out his upgraded thermostat and put a oem thermostat back... Any body else have a problem like this before ? Or know why this may be happening ?
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Old 05-10-2013, 11:15 AM   #2
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when you change the thermo. did you reprogram the PCM to make the fan switch come on with the new degree thermo
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Old 05-10-2013, 11:23 AM   #3
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when you change the thermo. did you reprogram the PCM to make the fan switch come on with the new degree thermo
No idea lol he may have. I honestly have no idea what that means
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Old 05-10-2013, 11:48 AM   #4
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the computer tells the electrical fan to come on at a certain temperture. it keep the engine/ radiator cool. it keeps the car from overheating
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Old 05-10-2013, 11:56 AM   #5
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Do the hot water test to see if the thermostat is functioning properly.
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Old 05-11-2013, 10:44 AM   #6
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Originally Posted by tonyd01gt View Post
the computer tells the electrical fan to come on at a certain temperture. it keep the engine/ radiator cool. it keeps the car from overheating
How do you reprogram PCM
?
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Old 05-11-2013, 10:57 AM   #7
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How do you reprogram PCM
?
Disconnect the negative battery terminal for about 20 min
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Old 05-11-2013, 11:10 AM   #8
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Disconnect the negative battery terminal for about 20 min
He had it like that for a couple weeks when he was putting engine in lol
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Old 05-11-2013, 03:32 PM   #9
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He had it like that for a couple weeks when he was putting engine in lol
Have y'all checked the thermostat? Could be the water pump too
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Old 05-11-2013, 03:40 PM   #10
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Have y'all checked the thermostat? Could be the water pump too
I think it is thermostat its an upgraded one so maybe can't handle it
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Old 05-13-2013, 09:16 PM   #11
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Quote:
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I think it is thermostat its an upgraded one so maybe can't handle it
IMO I wouldn't put a autozone/cheapie thermostat in my car. No idea how well the wax pallet is set to open up coming from in their providers.
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Old 05-13-2013, 09:28 PM   #12
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Quote:
Originally Posted by White03GT View Post

Disconnect the negative battery terminal for about 20 min
Imo if u wanted to run a much lower thermostat the ecu shouldve been reflashed doing a battery disconnect wont do the trick unless its a oem alternative like the 180° thermo. To truly take advantage you would have to have a tuner or a shop rewrite it for the ecu for the fans to kick on around say 175° for a 170° thermostat or so on and so forth just like i said imo
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Old 05-13-2013, 09:30 PM   #13
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You need to make sure your engine/hoses are burped properly. I would just drain all the fluid and reburp the system. I just did this on a customers 98 gt I did a PI head swap in last week. Also check your cool fan fuse. It's the first fuse on the junction fuse box. I attached a diagram below.
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Old 05-13-2013, 09:34 PM   #14
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Ahhhh i almost forgot check the lower hose.....it happened to me on a 5.4 swap we ran everything riggt but the lower hose was starting to cave in under vacuum sorta while running. We replaced it with a hose witg spring in it to maintain it feom collapsing. When the hose collapsed it was causing it to overheat even with everything set up correctly. I would suggest checking that out on his stang.
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Old 05-15-2013, 10:15 PM   #15
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Can anyone tell me how much the coolabt volume is in a 2003 GT?
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Old 05-15-2013, 10:32 PM   #16
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Can anyone tell me how much the coolabt volume is in a 2003 GT?
14.1 quarts.
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Old 05-15-2013, 10:39 PM   #17
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Dang thats a lot. Lol thanks man.
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Old 05-15-2013, 10:41 PM   #18
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Dang thats a lot. Lol thanks man.
Haha. Thats what I thought too. No problem.
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Old 05-15-2013, 10:51 PM   #19
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I was reading places that were saying 14.6 quarts. Was like wow. If my math is right thats like 11 gal. No?
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Old 05-15-2013, 10:54 PM   #20
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I was reading places that were saying 14.6 quarts. Was like wow. If my math is right thats like 11 gal. No?
1 gal=4 qt
So no
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Old 05-15-2013, 10:54 PM   #21
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I was reading places that were saying 14.6 quarts. Was like wow. If my math is right thats like 11 gal. No?
Its a little over 3.5 gallons.
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Old 05-15-2013, 10:59 PM   #22
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Wow thank you I feel really smart no. I need sleep and a day off at some point. Lol good lookin out man.
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