Mercury Villager 1993-2000
Nissan Quest 1993-2000
The coolant recovery tank is located on the driver-s side of the vehicle next to battery on 1993-98 models, and on the passenger-s side inner fender near the front on 1999-00 models.
The proper coolant level is slightly above the FULL COLD marking on the recovery tank when the engine is cold. Top off the cooling system using the recovery tank and its marking as a guideline.
A coolant level that consistently drops is usually a sign of a small, hard to detect leak, although in the worst case it could be a sign of an internal engine leak. In most cases, you will be able to trace the leak to a loose fitting or damaged hose.
Evaporating ethylene glycol antifreeze will have a sweet smell and leave small, white (salt-like) deposits, which can be helpful in tracing a leak.