1999 Mercury Grand Marquis: engine overheating

Filed Oct 2, 2017 · Lights · 160,000 miles · MI

We own three mercury grand marquis, love the cars however all three( 2000, 1999 and second 1999 all intemitantly loose headlights when high beams are on. If I quickly go to low beams I can see again...its like they are overheating with the amp draw of high beams and circuit breaks. This is way too common to be ok. It dangerous especially if one gets rattled with complete darkness at night and high speed. Bumps also seam to slightly affect it sometimes. This happens any time the gray 99 has high beams on for about 45mins. Only 10-15mins on blue 1999 and 2000 not as frequent yet but only has about 75k miles, where as the 1999 are 150-210 respectively. Started 5 years ago on my first and I just did not use high beam since I purchase second 1999 to replace first and had title issues so bought the 3rd 2000 and found they all have the same flaw!! My cell [xxx]. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).

Filed Aug 25, 2014 · Engine · 98,000 miles · FL

Driving on the hwy and the car started to overheat with hot steam shooting out from the engine and it also had a strong coolant smell. The car could not be driven until l it had $1,500 in repairs for a known, leaking plastic manifold issue. This failed part cracks and leaks into the hot engine area. And, ford had redesigned the failed part. Additionally, ford had once offered free fixes for a few months for police cars and taxi cabs with the same engines under a class action law suit but didn't tell the owners about. Thousands of consumers were ripped off because ford should have fixed this issue under the class action recall. But they didn't bother notify anyone about the three month recall window. In checking the federal safety agency records, there are thousands of us with the same reported problem. Please take some corrective action for us.

Filed Dec 11, 2007 · Fuel system · 78,002 miles · IL

1999 mercury grand marquis ls 4.6l (1) drove vehicle in a normal way, commuting from home to work daily. No speeding. In the mornings properly wait for 10 minutes to warm up the vehicle's engine prior to driving. Kept proper maintenance schedule by ford/mercury dealership. Never brought up to my attention of the possible default this part may cause down the line. Had a complete coolant flush for radiator. Replaced with new coolant. (2) misfire in cylinders 6 + 2. Check engine light on. Small amounts of coolant leakage onto top part of engine, profusely around the spark plug chambers. Coolant come in contact with alternator affecting check battery light to go on. Vehicle showed signs of intense shaking at idle and at normal driving conditions within 1 hr after check engine light came on. Vehicle is a 199 mercury grand marquis ls 4.6l. Vehicle could not be driven w/o being extremely shaky while driving. Hesitation present. On cold days, small presence of coolant traces were found inside the spark-plug pits along side the ignition coils and at times small vapor came from inside the engine noticed from inside the driver's seat coming from inside the hood causing concern. I found the following from the following ford parts website: http://www.1aauto.com/1a/intakemanifolds/-/-/1aeim00012. "the original intake manifold, due to the design, has an abnormal tendency to crack, leading to overheating and in many cases complete engine failure and/or damage to other parts of the car's engine. This new and improved intake manifold is designed to eliminate those problems!". (3) dealership charged me over $1500.00 for replacing the intake manifold, spark plug and ignition coil for cylinder #2 plus an oil change and filter. I requested old parts back and only the spark-plug and ignition coil was returned to me.

Filed Nov 25, 2007 · Engine · 150,000 miles · NC

I noticed coolant leaking from somewhere in the engine compartment, but initially had trouble finding where the leak was coming from. I finally discovered that the intake manifold was cracked at the plastic thermostat housing.

Filed Jul 2, 2006 · Engine · 158,200 miles · IL

Cracking plastic intake manifold on mercury v-8 car over heats due to water/coolant leaking looking into getting fixed.