Burp Cooling System Mustang Gt 4 6l V6 3 8l 2v Youtube 32v dohc instructions here: youtu.be vdiezahaeb8. Park on a very steep grade and run the engine to operating temp with the heat on and coolant cap off. that may do it. i would also consider lowering your fan temps to 174* (low speed) and 186* (high speed). park on a very steep hill and burp the system.
Mustang Radiator Replacement Burp Cooling System Ford Mustang 19 Squeeze the 2 large upper cooling system hoses 5 times. bubbles may appear in the funnel as air exits the system. start the engine and run for 5 minutes while monitoring the coolant in the funnel. a sudden drop in the funnel level indicates the elimination of air in the system. shut off the engine and let it cool for 10 minutes. Cap the overflow tank and do not remove the cap again. 3. the rest of the fluid is added from the crossover tube filler plug. 4. tape up a small funnel and screw it into the crossover filler tube. 5. fill the system till the you have about 1 2" of fluid in the funnel above the tube. 6. start the engine and let it run. 1. lack of heat. 2. temp gauge never reaching normal temp. 3. pinging while driving. 4. overheating. all of these issues are caused by not bleeding the cooling system after you drain the coolant. anytime the system is drained when you fill it trapped air will remain in the coolant. if this trapped air is not removed then you will have poor. If this happens just reinstall the plug quickly to minimize coolant loss. 8) after 40 min to an hour the engine will still be warm. slowly remove the crossover plug but use caution because there may still be a little pressure in the system. top off the coolant again but this time do not reinstall the plug. 9) after 3 to 5 more hours the engine.
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