white smoke (fuel smell) and water streaming from tail pipe


Asked by Jan 17, 2014 at 12:10 PM about the 1999 Mercury Mountaineer 4 Dr STD 4WD SUV

Question type: Maintenance & Repair

1999 Mountaineer, 5.0L, AWD. 226,000 mi. I have white smoke and water coming from tail pipe. No water in oil or vis versa. Can this be manifold related as opposed to block / heads.

14 Answers


Is it missing/idling rough? Check engine light on?

28 of 28 people found this helpful.

Is coolant level low or needing topped off regularly? If no then this could be that the weep hole in the lower back end of the muffler is stopped up. Your muffler has a weep hole in the lower back(outgoing) side. Right at the lower rim of muffler. Have seen these get stopped up and cause the naturally occurring condinsation in the exhaust system build up to the point that what appears to be pure water pouring out of the exhaust pipe. If hole is stopped up scrape the dirt off the hole. You will know its open when water comes pouring out of it.

5 of 5 people found this helpful.

If everything is working normal on some vehicles we had to drill the weep holes out on the mufflers to keep them from doing what you describe. Forgot about that dandy.


I wish the check engine light was on....lol. but no. yes on coolant being low / needs topping off every time is driven. I also have no heater, which makes sense with lose of coolant. Last time I started it, over heated until therm opened, which told me no coolant in block, and it was losing about 4-6 oz of water per min out the pipe ;0(

6 of 6 people found this helpful.

Remove the spark plugs and do a pressure test on the coolant system. This will cause it to leak and help you find it. If coolant shows up in spark plug hole you have a blown head gasket.

4 of 4 people found this helpful.

Thanks, I'll give that a shot.

1 of 1 people found this helpful.

Now, wait. I don't think I'm getting water in the plugs, no symptoms to indicate that. Also, I'm not sure about the blown gasket theory, with blown gasket shouldn't I see oil and water mixed somewhere??

8 of 8 people found this helpful.

Sometimes but not always. If loosing coolant but can't find a leak with white smoke out the exhaust is a sign of a blown head gasket. White smoke is caused by coolant entering the cylinder. Doing a pressure test on the cooling system with the spark plugs out will let you know for sure if coolant is entering the cylinders. Most auto parts stores will loan you the pressure tester equipment so doing the test is free and will give you peace of mind as to whether the head gasket is blown.

4 of 4 people found this helpful.

10/4, thanks for the sign of hope. Appreciate it.

1 of 1 people found this helpful.

Do as dandy said but lave the pressure tester on it until it goes to zero and then crank it over without the spark plugs in it.If it's in it this will show it.It will blow antifreeze out the cylinders.

1 of 1 people found this helpful.

Another good call tuff4x4. I did not explain how to know its in there. Thanks


Zero, got it. ;0) Thanks guys

1 of 1 people found this helpful.

I have a 2004 mountaineer it's running hot no water in oil but oil smells like gas and the water reservoir smells real strong of gas what's the cause . Intake ?

3 of 3 people found this helpful.

And it starts right up and runs perfect til over heats

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions


Looking for a Used Mountaineer in your area?

CarGurus has 1,166 nationwide Mountaineer listings starting at $1,980.


Search Mercury Mountaineer Questions

Mercury Mountaineer Experts

#1 Tom Demyan
Tom Demyan
Reputation 570
#2 kbro
Reputation 460
#3 tuff4x4
Reputation 300
View All

Related Models For Sale

Used Ford Explorer
914 Great Deals out of 63,691 listings starting at $799
Used Ford Expedition
414 Great Deals out of 23,905 listings starting at $1,500
Used Jeep Grand Cherokee
1,067 Great Deals out of 72,503 listings starting at $1,200
Used Ford F-150
2,091 Great Deals out of 192,317 listings starting at $290
Used Chevrolet Tahoe
593 Great Deals out of 33,019 listings starting at $1,500
Used GMC Yukon
419 Great Deals out of 20,457 listings starting at $1,495
Used Nissan Pathfinder
313 Great Deals out of 22,060 listings starting at $2,500
Used Lincoln Navigator
90 Great Deals out of 5,610 listings starting at $1,900
Used Dodge Durango
273 Great Deals out of 21,020 listings starting at $1,500
Used GMC Envoy
48 Great Deals out of 2,193 listings starting at $2,200

Used Cars For Sale

2010 Mercury Mountaineer For Sale
3 Great Deals out of 67 listings starting at $6,300
2009 Mercury Mountaineer For Sale
24 listings starting at $6,095
2008 Mercury Mountaineer For Sale
6 Great Deals out of 135 listings starting at $3,995
2007 Mercury Mountaineer For Sale
6 Great Deals out of 160 listings starting at $2,495
2006 Mercury Mountaineer For Sale
9 Great Deals out of 194 listings starting at $2,250

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.