Kawasaki WORKHORSE 250 (2003) [89/322] Valve valve guide clearance wobble method

ENGINE TOP END 4-25

Valves, Guides, Seats, Springs, Oil Seals

Valve Guide Installation

•

Clean the valve guide hole in the cylinder head.

•

Lightly oil the valve guide.

•

Set the O-ring under the valve guide flange.

•

Use the valve guide arbor and a hammer to drive the

guide into the head from the outside until the flange on

the guide seats against the head.

•

Ream the valve guide with the valve guide reamer [A]

even if the old guide is reused.

Special Tool - Valve Guide Reamer, 5.5 : 57001-1020

Valve-to-Guide Clearance Measurement

If a small bore gauge is not available, inspect the valve

guide wear by measuring the valve to valve guide clearance

with the wobble method as indicated below.

•

Insert a new valve [A] into the guide [B] and set a dial

gauge against the stem perpendicular to it as c lose as

possible to the cylinder head mating surface.

•

Move [C] the stem back and forth to measure valve/valve

guide clearance.

•

Repeat the measurement in a direction at a right angle to

the first.

If the reading exceeds the service limit, replace the guide.

NOTE

○

The reading is not actual valve/valve guide clearance

because the measuring point is above the guide.

Valve/Valve Guide Clearance (Wobble Method)

Standard Service Limit

Exhaust 0.05 ∼ 0.11 mm 0.27 mm

(0.0020 ∼ 0.0043 in.) (0.0106 in.)

Inlet 0.02 ∼ 0.08 mm 0.23 mm

(0.0008 ∼ 0.0032 in.) (0.0091 in.)