1991 Mercury Cougar Heater blowing cold, temp gauge raising

[quote:498f7bd316="joseph80011"]Heater problem
1991 Mercury Cougar 6 cyl Two Wheel Drive Automatic 98000 miles
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I replaced eveything to do with the cooling system ie:radiator, thermostat, radiator cap, heater core, and got a flush and fill. My temp gauge is raising and lowering and my heater is blowing cold. My antifreeze is also boiling into the reservoir tank. Anything else I should look at ?[/quote:498f7bd316]



V6 3.8L
CHECK HEAD GASKET
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[quote:e28ff7a3f0="BMRFIXIT"][quote:e28ff7a3f0="joseph80011"]Heater problem
1991 Mercury Cougar 6 cyl Two Wheel Drive Automatic 98000 miles
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I replaced eveything to do with the cooling system ie:radiator, thermostat, radiator cap, heater core, and got a flush and fill. My temp gauge is raising and lowering and my heater is blowing cold. My antifreeze is also boiling into the reservoir tank. Anything else I should look at ?[/quote:e28ff7a3f0]



V6 3.8L
CHECK HEAD GASKET
-------------------------------[/quote:e28ff7a3f0]
Wouldnt you notice oil in the antifreeze or antifreeze in the oil? wouldnt it have a miss to it when at idle or loose compression ?

[quote:e89e935005="joseph80011"][quote:e89e935005="BMRFIXIT"][quote:e89e935005="joseph80011"]Heater problem
1991 Mercury Cougar 6 cyl Two Wheel Drive Automatic 98000 miles
----------------------------------------------------------------
I replaced eveything to do with the cooling system ie:radiator, thermostat, radiator cap, heater core, and got a flush and fill. My temp gauge is raising and lowering and my heater is blowing cold. My antifreeze is also boiling into the reservoir tank. Anything else I should look at ?[/quote:e89e935005]



V6 3.8L
CHECK HEAD GASKET
-------------------------------[/quote:e89e935005]
Wouldnt you notice oil in the antifreeze or antifreeze in the oil? wouldnt it have a miss to it when at idle or loose compression ?[/quote:e89e935005]

no no nop
check head gasket
very very very common