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07-19-2019, 11:58 PM | #1 |
Mustang Enthusiast
Join Date: Oct 2002
Location: Cincinnati, OH
Posts: 5,509
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"Burp" of Coolant on This Hot Day
The '03 I recently purchased released coolant from the area of the overflow bottle pressure cap today.
There was no indication of an overheating condition while driving the car. I had been driving at reduced highway speeds in traffic in this hot weather. The AC was not running. When I parked and turned off the car, that's when the coolant flowed free. The level in the bottle was at the Low mark after that. I drove the car back to where I store it, and it indicated no overheating condition on the gauge. I had driven the car previously around town and had no issues, with and without the AC running. I am wondering if there was air leftover in the system after the previous owner changed the coolant when he replaced a leaking T-connector. Any thoughts or previous experiences welcome.
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Tony Alonso '03 Ford Mustang Mach 1 Coupe Black (code UA) w/o IUP, 5-speed VIN 388409, Built ??/??/???? Delivered 7/12/2019 w/122,696 miles |
07-21-2019, 08:00 PM | #2 |
Highly Compressed
Join Date: Nov 2008
Location: DFW
Posts: 79
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Re: "Burp" of Coolant on This Hot Day
Yep, sounds like you had an air bubble in the system. There is a plug in the coolant crossover on top of the engine that is supposed to be taken out to "burp" the system when changing the coolant. Sounds like this may not have been done.
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07-22-2019, 08:57 AM | #3 |
Mustang Enthusiast
Join Date: Oct 2002
Location: Cincinnati, OH
Posts: 5,509
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Re: "Burp" of Coolant on This Hot Day
Thanks for the info. It's been awhile since I've looked at these engines, and I had forgotten about the plug. Oddly enough, when I had the coolant changed at a dealership on my first Mach 1 back a number of years ago, I had the same thing happen. Perhaps that wasn't done then either.
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Tony Alonso '03 Ford Mustang Mach 1 Coupe Black (code UA) w/o IUP, 5-speed VIN 388409, Built ??/??/???? Delivered 7/12/2019 w/122,696 miles Last edited by Tony Alonso; 07-22-2019 at 07:47 PM. |
07-22-2019, 12:53 PM | #4 |
Lorraine's driver
Join Date: Apr 2012
Location: Indianapolis, IN
Posts: 2,442
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Re: "Burp" of Coolant on This Hot Day
A couple years ago, I had forgot that I had removed the fuse for the cooling fan. When you upload tuner files to the ECU, the stupid cooling fan runs through the whole process and I didn't like that drawing from my battery. Anyway, back to the story...so the following day, I participated in Independence Day parade. It was fun until steam started flowing out of my engine bay, along with about a liter of coolant from my fill cap. I didn't know this at the time, but the plastic cap will open when a certain pressure is reached. Once I shutdown the engine, it stopped flowing out and was okay. Apparently once this has happened, it is suggested that you replace the cap. I bought a new cap from my local Ford dealership and everything was fine...after I put the cooling fan fuse back in LOL. The cap was around $15, if I remember right. Maybe your cap has opened before with the previous owner and needs to be replaced?
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07-22-2019, 07:46 PM | #5 | |
Mustang Enthusiast
Join Date: Oct 2002
Location: Cincinnati, OH
Posts: 5,509
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Re: "Burp" of Coolant on This Hot Day
Quote:
I recall having this happen on my original 2003 after a coolant flush at a dealership. One would presume they would have gotten the air out of the system, but apparently it didn't happen. At that time, the coolant was topped off and that was it.
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Tony Alonso '03 Ford Mustang Mach 1 Coupe Black (code UA) w/o IUP, 5-speed VIN 388409, Built ??/??/???? Delivered 7/12/2019 w/122,696 miles |
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08-06-2019, 08:56 PM | #6 |
Mustang Enthusiast
Join Date: Oct 2002
Location: Cincinnati, OH
Posts: 5,509
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Re: "Burp" of Coolant on This Hot Day
The cap on the overflow bottle was not Ford OEM but aftermarket. It just didn't hold the pressure, resulting in the burp. When I unscrewed it, the cap came off very easily. A factory one has replaced it. So far, so good (knock on wood).
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Tony Alonso '03 Ford Mustang Mach 1 Coupe Black (code UA) w/o IUP, 5-speed VIN 388409, Built ??/??/???? Delivered 7/12/2019 w/122,696 miles Last edited by Tony Alonso; 08-07-2019 at 10:30 PM. |
08-07-2019, 08:30 AM | #7 |
700 HP Mach
Join Date: Nov 2003
Location: Orlando, FL
Posts: 8,384
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Re: "Burp" of Coolant on This Hot Day
glad it was an easy fix, I was going to suggest a bad cap and or bottle as well
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03 dsg mach1 - MPR built 9.5:1 motor, D1, cams, ported intake, full exhaust, magnum t56, built rear, E85 etc... '12 F150 FX2 Supercrew with Ecoboost daily beater |
08-07-2019, 01:14 PM | #8 |
Lorraine's driver
Join Date: Apr 2012
Location: Indianapolis, IN
Posts: 2,442
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Re: "Burp" of Coolant on This Hot Day
Nice!!
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