ADAPTER 1910522 - Caterpillar

Perform this test in order to determine if a valve guide should be replaced.
Illustration 1 g00314806
Measure the radial movement of the valve in the valve guide.
(1) Valve guide
(2) Radial movement of the valve in the valve guide
(3) Valve stem
(4) Dial indicator
(5) Valve head
Place a new valve in the valve guide.
Place a dial indicator with a magnetic base on the face of the cylinder head.
Lift the edge of the valve head to a distance of 15.0 mm (0.60 inch).
Move the valve in a radial direction away from the dial indicator. Make sure that the valve moves away from the dial indicator as far as possible. Position the contact point of the dial indicator on the edge of the valve head. Set the position of the needle of the dial indicator to zero.
Move the valve in a radial direction toward the dial indicator as far as possible. Note the distance of movement which is indicated on the dial indicator. If the distance is greater than the maximum clearance of the valve in the valve guide, replace the valve guide. Refer to Specifications, "Cylinder Head Valves" for the clearances. When new valve guides (1) are installed, new valves and new valve seat inserts must be installed. For more information, contact your distributor or your dealer.