Valve Clearance
WARNING: This page is about a different car, the 1995 Ford Aerostar. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Information on valve clearance check is not available from manufacturer.
The 4.0L engine uses nonadjustable hydraulic roller lifters and nonadjustable rocker arms. If lifters are excessively worn or noisy, repair or replace as necessary.
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES
article in GENERAL INFORMATION before disconnecting battery.