1998 ISUZU TROOPER Service Repair Manual

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ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A Ð 11
Valve Contact Width
1. Check the valve contact faces for roughness and
unevenness.  Make smooth the valve contact sur-
faces.
2. Measure the valve contact width.
If the meas

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ISUZU TROOPER 1998  Service Repair Manual 6A Ð 12 ENGINE MECHANICAL
3. Visually inspect both ends of the push rod for exces-
sive wear and damage.  The push rod must be re-
placed if these conditions are discovered during
inspection.
REASSEM

Page 1563 of 3573

ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A Ð 13
3. Valve Spring
·Attach the valve seat to the upper spring seat.  The
painted area of the valve spring should be facing
downward.
2. Split Collar
·Use a spring compressor

Page 1564 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A Ð 14 ENGINE MECHANICAL
CAMSHAFT, TAPPET
6. Camshaft Timing Gear
·Install the stopper bolt 1 to the timing pulley to
prevent it from turning.
·Use the timing pulley puller 2 to remove the
pulley.

Page 1565 of 3573

ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A Ð 15
INSPECTION AND REPAIR
Make the necessary adjustments, repairs, and part replacements if excessive wear or damage is discovered
during inspection.
8. Camshaft
9. Tappet
1. Me

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ISUZU TROOPER 1998  Service Repair Manual 6A Ð 16 ENGINE MECHANICAL
4. Camshaft Run-Out
¥ Mount the camshaft on V-blocks.
¥ Measure the run-out with a dial indicator.
If the measured value exceeds the specified limit,
the camshaft must be

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ISUZU TROOPER 1998  Service Repair Manual ENGINE MECHANICAL 6A Ð 17
REASSEMBLY
9. Tappet
1) Apply a coat of engine oil to the tappet  and the
cylinder body tappet insert holes.
2) Locate the position mark applied at disassembly (if
the tappe

Page 1568 of 3573

ISUZU TROOPER 1998  Service Repair Manual 6A Ð 18 ENGINE MECHANICAL
8. Camshaft
1) Apply a coat of engine oil to the camshaft and the
camshaft bearings.
Install the camshaft to the cylinder body.
Take care not to damage the camshaft bearings