1st time flushing coolant - Mustang Evolution

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Old 03-08-2019, 10:39 PM   #1
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1st time flushing coolant

Been doing some research on the subject before i proceed.
Havent got under the car to check, is the petcock located on the passenger side (yellow knob)? Does our radiator have a bleed valve?

Please let me know if im missing any steps
1. with cold engine, remove reservoir cap and drain radiator petcock
2. tighten petcock and fill system up with distilled water
3. start engine and have heater on max idle for 10-15mins
4. watch temp gauge and add more water if necessary
5. turn off engine let it cool, drain the water
6. refill coolant, turn on engine
7. have heater on max, top of coolant
8. let it idle 15min with reservoir cap off to burp/bleed air out o f system
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Old 03-10-2019, 06:25 AM   #2
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Did my 2012 V6 about a year ago before I sold it and your procedure sounds correct. The most important thing is to use Motorcraft coolant and distilled water. The Motocraft is not cheap but from what I read other coolants can cause a lot of harm in the engine. I also start my engine after everything is drained, for a few seconds to let the water pump push anything else out. In the old days the engine blocks had drain plugs that would allow you to drain everything in the block, but today they don't have them so there is still some coolant sitting in the block. I don't use the 50/50 mix coolant as I don't think you can get enough into protect in cold weather climates due to the water sitting in the block. Use full strength and pour 1/2 of the system capacity in before adding any distilled water. As I remember I couldn't even get that much in before it was full.
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