Ford Ranger Maintaince And Repair Manual page 429

2.3L, 2.5L AND 4.0L SOHC (VIN E) ENGINES
Check the lift of each lobe in consecutive order and make a note of the readings. Camshaft assembly
specifications are sometimes modified by Ford after production. Refer to a local reputable machine shop as
necessary.
1. Remove the air cleaner and the valve rocker arm cover.
2. Measure the distance between the major (A−A) and minor (B−B) diameters of each cam lobe with a
Vernier caliper and record the readings. The difference in the readings on each cam diameter is the
lobe lift.
3. If the readings do not meet specifications, replace the camshaft and all rocker arms.
4. Install the valve rocker arm cover and the air cleaner.
2.9L, 3.0L, 4.0L (VIN X) AND 5.0L ENGINES
Check the lift of each lobe in consecutive order and make a note of the reading. Camshaft assembly
specifications are sometimes modify by Ford after production. Refer to a local reputable machine shop as
necessary.
1. Remove the fresh air inlet tube and the air cleaner. Remove the heater hose and crankcase ventilation
hoses. Remove valve rocker arm cover(s).
2. Remove the rocker arm stud nut or fulcrum bolts, fulcrum seat and rocker arm.
3. Make sure the push rod is in the valve tappet socket. Install a dial indicator D78P−4201−B (or
equivalent) so that the actuating point of the indicator is in the push rod socket (or the indicator ball
socket adapter Tool 6565−AB is on the end of the push rod) and in the same plane as the push rod
movement.
4. Disconnect the I terminal and the S terminal at the starter relay. Install an auxiliary starter switch
between the battery and S terminals of the starter relay. Crank the engine with the ignition switch off.
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HOW TO USE THIS BOOK
Checking camshaft lobe lift
Click to enlarge
INSPECTION