The composite (plastic) intake manifold may crack near the thermostat housing and cause a coolant leak. Ford released an updated manifold that was reinforced to prevent a recurrence. No recall was issued for this problem but Ford did extend the warranty to seven years on some models from the date of purchase.
Coolant Leak and/or Engine Overheating Due to Cracked Intake Manifold on Mercury Grand Marquis
Average mileage: 116,064 (10,700–308,000)
112 people reported this problem
77 people shared problem details
crack in the intake manifold...saw a recall on it for the plastic one to be replaced with the new aluminum, but my luck it does not apply to me because my car is to old. My mechanic is charging me 950 for the fix and said he would keep the information he found on line for this. I think Ford being a reputible company and Michigan based should step up and support all who have this problem no matter when it occurs
2000 Mercury Grand Marquis149,000Visitor
Heater box to intake manifold heater hose nipple stripped out at manifold. Lose about 1 gallon of antifreeze every 3 weeks. My mechanic says this is a common problem. Ford should be embarrassed and replace all for free. The engineer that designed the manifold and the manager that approved the design should own one of these cars for the rest of their lives.
2003 Mercury Grand Marquis129,000Visitor
Intake manifold cracked... gonna cost a bundle to replace. It would be nice if they weren't made out of plastic! Just doesn't make a whole lot of sence to me.
1998 Mercury Grand Marquis226,000Visitor
Plastic manifold cracked at the thermostat. No way to fix so no option but to replace. Dealer said it would cost $1,260 to replace (includes $400+ for the part). I bought the part on-line for $216 and did it myself. Took several hours but was not terribly difficult. Just a lot of stuff to take off, so mark hoses and wires well.
1996 Mercury Grand Marquis122,000Visitor
had my merc for awhile now and suddenly i smelled something and then saw smoke coming from under the hood, i pulled over and saw coolent everywhere took it in and found out i have a small crack behind my alternator on my intake manifold...did lots of research and come to find out im not the only one with this problem THANKS FORD.. for a new manifold online for $210 and now im going to attempt to replace it myself after finding out having a professional do what i can figure out will be 4 to 500 just for labor so wish me luck and again THANKS FORD!!
1997 Mercury Grand Marquis126,500Visitor
Pool of antifreeze on top of engine block beneath the induction manifold.
2003 Mercury Grand Marquis66,045Visitor
I purchased my Grand Marquis LSE new in 2003. As you can see from the mileage I do not drive the car a lot of miles per year. I maintain the car as required including replacing belts and hoses as required. The intake manifold developed a crack and had to be replaced. The cost was over $1000.It's a shame that an automobile that cost over $32000 at the time is manufactured with plastic parts that don't hold up. So much for Fords quality. I can see that I'm not the only one who has had this problem. One would think that Ford would stand behind their product. Although most of the reports that show this problem have a lot more miles on them than I do this part should not fail under normal driving conditions.
Just bought the car from an elderly gentleman who was the original owner. Looked and drove great untill I got it on the freeway and it went up in smoke... or should I say steam. Manifold cracked in the exact spot and cost me $1000 to fix. This will be my car for a long time, I hope.
1998 Mercury Grand MarquisVisitor
thermostat housing unit leaking
Parked in garage after a 45 miles drive. Found puddle of yellowish engine oil like fluid on floor. Car never overheat and no problem with transmission. Engine oil, power steering, brake and auto trans fluid all check out fine except coolant low and disappeared from overflow tank. Dealership identified the coolant leak caused by cracked intake manifold. Cost $1300 to replace.
1999 Mercury Grand Marquis151,000Visitor
1997 Mercury Grand Marquis75,000Visitor
Cracked intake manifold.
1996 Mercury Grand Marquis75,000Visitor
If there wasn't a recall, WHY CAN'T WE MAKE A CLASS ACTION LAW SUIT???? a 2004 Grand Marquis with this problem.
2000 Mercury Grand Marquis125,000Visitor
My car overheated in the dead of winter and the check engine light came on. When I checked the coolant levels I was almost out. After I filled it back up, I ran out again after just 12 miles--a full 6 quarts of coolant, and a very severe leak. Visual diagnosis confirmed significant leakage of coolant in the thermometer housing on the intake manifold. As the shop I use quoted me over $1,000 to fix it, which is par for the course, I opted to do it myself. The manifold was $250 and it took about 6 hours of labor. If you go this route, you'll be pulling out a lot of hardware, so be organized. And get yourself a set of ratcheting box-end wrenches, preferably pivoting ($60 at Wal-Mart). The crash bracket is incredibly hard and awkward to take out, since there's a stud mounted to the back of the engine block that has to come out.
2001 Mercury Grand MarquisVisitor
fix at shop. Name is Oscar Barlow p.o. box 8352 chattanooga,Tn 37414. We also been having axle problems and other problems with all wheels. Thank You. email is also firstname.lastname@example.org
1998 Mercury Grand Marquis101,000Visitor
coolant was getting in the combustion camber through the intake, i just replace the intake it solve the problem.
2000 Mercury Grand Marquis47,000Visitor
cracked manifold under the thermostat. Replaced with new manifold.
1996 Mercury Grand MarquisVisitor
I have changed the intake manifold on my 1996 Mercury grand Marquis and now I'm getting a loud knocking sound and loss of power. Need help determining the problem.
I have heard alot of people saying there intake cracked on there grand marquis but on my 2000 m...
I have a coolant leak at a crack in the intake manifold at the top-front of the 4.2(maybe 4.6?)...
a crack manifold
I put on a new intake manifold on my Grand Marquis GS 4.6 Litre, made sure the wires were right...
I saw two leaks on ground that look orange or rust. Went to a car mechanic and he said it is th...