Ranger 2WD L4-153 2.5L SOHC VIN C SFI (1998)
Valve Guide Seal: Service and Repair
Removal
1. CAUTION: Valve spring, valve stem seal, valve spring retainer, valve spring retainer key may be replaced by holding the affected valve against
the seat by utilizing compressed air. Use appropriate air line tool installed in the spark plug hole. A minimum of 965 kPa (140 psi) line pressure is
required. If air pressure does not hold the valve shut, the valve is damaged or burned and the cylinder head must be removed.
2. Remove the valve cover.
3. Rotate the camshaft until the roller follower for the valve to be repaired is on the base circle of the cam.
4. Install the Valve Spring Compressor, compress and hold down the valve spring.
5. Slide out the roller finger follower over the lash adjuster.
6. Replace the spark plug for cylinder being serviced, with an air line adapter.
7. Turn on air supply and pressurize cylinder. Air pressure may rotate the crankshaft until the piston, pin and ring reaches the bottom of the stroke.
CAUTION: The crankshaft may rotate when air pressure is applied. Remove all objects from fan area.
