Valve Guide; Inspection And Repair - Isuzu 1999 RODEO Workshop Manual

6A–56 ENGINE MECHANICAL (6VD1 3.2L)
5. Use the J–8062 valve spring compressor and
J–42898 valve spring compressor adapter to remove
split collar.
6. Remove valve spring.
7. Remove valve.
8. Remove oil controller and spring lower seat.
9. Remove the valve guide using the J–42899 valve
guide replacer.

Inspection and Repair

Valve Spring
CAUTION: Visually inspect the valve springs and
replace them if damage or abnormal wear is evident.
1. Measure the free height of the springs. The springs
must be replaced if the free height is below the
specified limit.
Standard : 44.6 mm (1.756 in)
Limit : 43.6 mm (1.717 in)
2. Measure the valve spring squareness with a steel
square and replace the valve springs if the measured
value exceeds the specified limit.
Limit : 2 mm (0.079 in)
014RW042
3. Using a spring tester to compress the springs to the
installed height, measure the compressed spring
tension, and replace the springs if the measured
tension is below the specified limit.
At installed height: 35.0 mm (1.38 in)
Standard: 196 N (44 lb)
Limit: Less than 181 N (41 lb)

Valve Guide

CAUTION: Take care not to damage the valve seat
contact surface, when removing carbon adhering to
the valve head. Carefully inspect the valve stem for
scratchs or abnormal wear. If these conditions are
present, the valve and the valve guide must be
replaced as a set.
014RS004
014RS005
014RS006