I have a 1999 grand marquis and was changing out my spark plugs and found ain't freeze on em and on the ground don't where the leak is . How can I find the leak

45

Asked by Mar 07, 2013 at 04:18 PM about the 1999 Mercury Grand Marquis 4 Dr LS Sedan

Question type: Maintenance & Repair

2 Answers

665

Was the antifreeze on the outside of the plug or on the electrode part? If it was on the outside try running your hand on the areas above the plugs (when engine is cold) and see if you can locate the source. Check hoses and clamps carefully as well. Antifreeze can drip down a hose from the area where the actual leak is.

6,155

If the anti-freeze is on the electrode part of the sparkplug and it didn't drip or run down from up above onto the plug, that means that you probably have a blown head gasket and antifreeze from the cooling jacket in the head is passing thru the blown area of the head gasket and getting into the engine block cylinder. Your engine is so hot inside that it will burn off the anti-freeze just like the gasoline in the cylinder thus you won't show a leak on the outside or it might be so small of a leak that you won't see it. Either way if you have anti-freeze where you should have it, then there is a leak somewhere and more than likely from a blown head gasket or a wornout heater hose or even a worn radiator hose depending on where you found the fluid. They do make a dye that you can pour into your radiator or overflow tank and then you hold a small blacklight against your engine and the dye will show up under the blacklight light. The auto parts store should have the dye and the blacklight to go with it, maybe in a kit or separately. Or you could take it to a repairshop or a radiator shop and have them check it for you, but don't drive the car too far if it's leaking anti-freeze as you could do major damage to your engine as it will over heat without the right amount of fluid in the radiator. Good Luck, Kenny/MrBlueOval.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Mercury Grand Marquis Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Mercury Grand Marquis Experts

#1 Tracy Hooks
Tracy Hooks
Reputation 5,060
#2 kbro
kbro
Reputation 2,040
#3 Js08016
Js08016
Reputation 1,580
View All

Related Models For Sale

Used Lincoln Town Car
41 Great Deals out of 2,109 listings starting at $1,995
Used Ford Crown Victoria
6 Great Deals out of 1,398 listings starting at $1,700
Used Chevrolet Impala
919 Great Deals out of 35,385 listings starting at $1,700
Used Ford F-150
3,112 Great Deals out of 209,132 listings starting at $1,200
Used Cadillac DeVille
5 Great Deals out of 1,958 listings starting at $1,600
Used Chevrolet Tahoe
834 Great Deals out of 28,003 listings starting at $1,700
Used Buick LeSabre
11 Great Deals out of 2,267 listings starting at $1,299
Used Honda Accord
1,012 Great Deals out of 75,846 listings starting at $899
Used Toyota Camry
1,214 Great Deals out of 97,665 listings starting at $1,250
Used Chevrolet Camaro
417 Great Deals out of 40,746 listings starting at $3,500

Used Cars For Sale

2011 Mercury Grand Marquis For Sale
46 listings starting at $5,900
2010 Mercury Grand Marquis For Sale
5 Great Deals out of 122 listings starting at $2,999
2009 Mercury Grand Marquis For Sale
4 Great Deals out of 106 listings starting at $2,995
2008 Mercury Grand Marquis For Sale
6 Great Deals out of 150 listings starting at $2,300
2007 Mercury Grand Marquis For Sale
10 Great Deals out of 164 listings starting at $1,985