Trooper LS V6-3.5L (1998)
1. Using Valve guide replacer: J-42899, drive out the valve guide from the combustion chamber side.
2. Apply engine oil to the outside of the valve guide.
Using valve guide replacer J-42899, drive in a new valve guide from the camshaft side, and check the valve guide height.
Valve guide upper end height: 13.0 mm (0.5118 inch) (Measured from the cylinder head upper face)
3. Check the clearance. If the clearance is less than the specified value, ream the inside diameter of valve guide. Using a sharp 6 mm reamer, ream
the valve guide to obtain the specified clearance.
Valve Seat
1. Measure the protrusion of the valve stem when a new valve is installed in the cylinder head If the protrusion of the valve stem exceeds the limit,
replace the valve seat insert or the cylinder head assembly.
Protrusion of valve stem:
Intake Standard: 39.32 mm (1.5480 inch)
Limit: 39.47 mm (1.5539 inch)
Exhaust Standard: 39.30 mm (1.5472 inch)
Limit: 39.45 mm (1.5531 inch)
