TM 5-3805-280-24-2
Camshaft, Balancer Shafts and Timing Gear Train
MEASURE VALVE LIFT
16
11
IMPORTANT: For a more accurate measurement,
measure valve lift at 0.00 mm (in.)
rocker arm-to-valve tip clearance.
NOTE: Measuring valve lift provides an indication of wear
on camshaft lobes and cam followers or push
rods.
1. Remove rocker arm cover.
2. Using JDG820 or JDE83 Flywheel Turning Tool and
JDE81-4 Timing Pin, lock No. 1 piston at TDC
See CHECK AND ADJUST VALVE CLEARANCE in
Group 05 for engine valve locations.
3. Set rocker arm-to-valve tip clearance to 0.00 mm (in.)
for:
No. 1 and 3 exhaust and No. 1 and 2 intake valves
on 4-cylinder engines.
No. 1, 3, and 5 exhaust and No. 1, 2, and 4 intake
valves on 6-cylinder engines.
4. Place dial indicator tip on top of valve rotator. Preload
indicator tip and set dial at 0.0 mm (in.).
5. Remove timing pin from flywheel and manually rotate
engine one full revolution (360) in running direction.
6. Observe dial indicator reading as valve is moved to full
open. Record maximum reading and compare with
specifications given below.
Intake Valves--Specification
Valve Lift [at 0.00 mm (in.) Valve ......... 11.77--12.21 mm (0.463--0.481
Clearance]
in.)
Wear Limit ................................................................ 11.34 mm (0.447 in.)
Exhaust Valves--Specification
Valve Lift [at 0.00 mm (in.) Valve ......... 11.51--11.94 mm (0.453--0.470
Clearance]
in.)
Wear Limit ................................................................ 11.08 mm (0.436 in.)
Continued on next page
RG,16,DT7507 1914NOV971/2
13-243
