Coolant Loss, Engine Overheating, White Smoke From Exhaust on Mercury Cougar

White smoke coming from the exhaust could indicate that a head gasket has blown or there is a cracked cylinder head. Our technicians tell us that removal and inspection of the cylinder heads will be required to confirm a crack is present.

RepairPal Verified
Average mileage: 104,356 (34,500–150,000)
Engines affected: 3.8L V6, 4.6L V8
8 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997
19 people reported this problem
7 people shared problem details
1993 Mercury Cougar- 3.8L V6150,000
water going right though it out the exhaust, put stop leak but it still losing water
Temp getting hot,and then cooling off.White smoke coming from exhaust.Used block sealer from part's store.Seem's to be working so far.
1994 Mercury Cougar- 4.6L V8
white smoke out of tail pipe
1990 Mercury Cougar- 3.8L V6100,000
White smoke and radiator hose bad
1990 Mercury Cougar- 3.8L V6100,000
White smoke and radiator hose bad
I had hydrocarbons in radiator overflow, plus white smoke coming from tailpipe,it was over heating and loosing coolant.I used blue devil block seal on it two years ago and it took care of it ever since.
started it up to leave for work it was running rough so i give it a little and it started blowing smoke out of the tail pipe no warning at all the head gaskets was going to give out
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