The 4.0-liter V6 Ford 99X or 4.0 OHV engine was produced in Germany from 1990 to 2000 and was installed in the first two generations of the Explorer SUV, popular in a number of markets. A similar engine, but under a different designation, was installed on the Aerostar minibus and Ranger pickup truck.
|Production years||1990 – 2000|
|Fuel system||distributed injection|
|Power output, hp||155 – 165|
|Torque output, Nm||298 – 314|
|Cylinder block||cast iron V6|
|Block head||aluminum 12v|
|Cylinder bore, mm||100|
|Piston stroke, mm||84|
|Recommended engine oil||5W-30|
|Engine oil capacity, liter||4.7|
|Euro standards||EURO 1/2|
|Fuel consumption, L/100 km (for Ford Explorer 1993)
|Engine lifespan, km||~400 000|
The engine was installed on:
- Ford Explorer 1 (UN46) in 1990 – 1994; Explorer 2 (U105) in 1994 – 2000.
Disadvantages of the Ford 99X engine
- This is a fairly reliable and resourceful power unit and all its problems are due to old age.
- Most complaints are related to lubricant leaks on gaskets and seals.
- At high mileage, severe wear of the valve guides is often encountered.
- Hydraulic compensators do not tolerate cheap oil and can begin to knock after 200 thousand km.
- The short timing chain between the crankshaft and camshaft is stretched after 300,000 km.