Lincoln Mark VIII Problems
RepairPal has identified the most common problems with the Lincoln Mark VIII based on complaints from actual vehicle owners. We'll tell you what the problem is and what it'll take to fix it.
The 4.6L V8 engine used in the Lincoln Mark VIII from 1993-1998 is known for displaying the normal symptoms of a coolant leak, including overheating, especially when the vehicle is idling, the strong smell of coolant from the engine, and illumination of the low engine coolant warning light.
This leak is difficult to locate as it is buried underneath the intake manifold, and only begins to leak coolant onto the ground in advanced stages of disrepair. This leak springs from the heater tube, which allows coolant to flow between the water pump and HVAC heater core.
When the connection for this tube begins to leak, the coolant burns on the hot engine, and produces a sweet smell that is unmistakably engine coolant.
The remedy can be complicated, and will necessitate removal of the intake manifold, heater tube, and possibly the water pump. After removal of these items, the connector may be replaced, or a set of o-rings, depending on the year of the vehicle.
Sagging suspension can be a result of air suspension struts and/or drier leaking air. These type of air leaks can lead to failure of the air suspension compressor.
Checking and adjusting the AC compressor clutch air gap can extend the service life of the AC compressor.
In high dust areas, problems with the EGR system are common. The filter for the EGR solenoid may plug and cause the EGR to activate when it should not; this can cause the engine to stall. The dirty filter should be replaced to correct this concern.
Due to age and possible damage during removal, it is recommended to replace the spark plug boots when replacing the spark plugs,
Even though the manufacturer does not call for regular servicing, our technicians recommend servicing the power steering fluid regularly.
Erratic engine coolant temperature or intermittent overheating can be caused by corrosion inside the water pump. The impeller may spin on the water pump shaft or the impeller may corrode. Either condition reduces coolant circulation resulting in engine overheating.
An exhaust leak may develop in front of the catalytic converter. This type of leak should be corrected as soon a possible to avoid damaging the catalytic converter.