I have a 95 marquis LS with 178K. I bought the car about a month ago. After having the car foe about 1 week i noticed the tem guage was running high. I checked the coolant and it was real low. I topped it back off with 50/50 coolant. Ran fine and problem seemed to be that it was just low on coolant. Well 2 weeks later i noticed that coolant is leaking for under the car just before the oil pan. I checked the coolant level and it again was very very low. I dont believe it is the water pump nor thermostat or hoses. Im not sure if its a freeze plug (hope not) or a broken heater hose or bad heater valve. Any suggestions ?

 

This car has the ByPass hose that runs under the intake manifold. You are at the mileage that these fail. Unfortunately, you will have to remove the intake manifold to replace this hose. Good Luck, Bill

 

this is the same problem even i am facing can any ine suggest me the best.