Valve Spring Inspection And Measurement; Valve And Seat Grinding; Valve Cleaning Procedure - Suzuki XL7 2007 Service Manual

1D-182 Engine Mechanical:

Valve Spring Inspection and Measurement

Reference: "Cylinder Head Disassemble: ".
Special tool
J 22738-B Valve Spring Tester
Inspection Procedure
1. Clean the valve springs in solvent.
WARNING
!
Refer to "Safety Glasses Caution: ".
2. Dry the valve springs with compressed air.
3. Inspect the valve springs for broken coils or coil
ends.
Measurement Procedure
1. Measure the valve spring tension using the J 22738-
B. Refer to "Engine Mechanical Specifications".
2. If low valve spring load is found, replace the valve
springs. DO NOT use shims to increase spring load.
The use of shims can cause the valve spring to
bottom out before the camshaft lobe is at peak lift.
Reference: "Cylinder Head Assemble: ".

Valve and Seat Grinding

Reference: "Cylinder Head Disassemble: ".

Valve Cleaning Procedure

1. Use soft bristle wire brush to clean any carbon build-
up from the valve head. DO NOT use a wire brush
on any part of the valve stem. The valve stem is
chrome plated to provide enhanced wear
characteristics. Wire brushing the stem could
remove the chrome plating.
2. Thoroughly clean the valve with solvent and wipe
dry.
Valve Visual Inspection Procedure
1. Inspect the valve for damage from the head to tip for
the following conditions:
– Pitting in the valve seat area (1)
– Lack of valve margin (2)
– Bending in the valve stem (3)
– Pitting or excessive wear in the stem (4)
– Worn valve key grooves (5)
– Worn valve tip (6)
2. Replace the valve if any of these conditions exist.