Contents: Camshafts ⇓ Pushers ⇓
Camshafts
1. To measure camshaft runout, please contact a specialist.
2. Inspect the shaft bearing journals for scratches and wear marks. If the shafts are worn, replace them together with the cylinder head. Measure the bearing journal diameters.
3. Inspect the camshafts for wear. Using a micrometer, measure the height of the cams. If the cam wear exceeds the permissible limits, replace the camshaft.
4. Measure the camshaft bearing lubrication clearances using a plastic gauge. If the clearance exceeds the permissible limits, replace the camshaft and recheck. If the result remains the same, replace the cylinder head.
5. Determine the width of the crushed plastic strip using a special table.
Pushers
1. Inspect the tappet surfaces for wear, scratches and signs of overheating. If one or more tappets are damaged, all tappets must be replaced.
2. Measure the outside diameters of the tappets and the inside diameters of the corresponding holes in the head. Subtract the tappet diameter from the bore diameter to get the lubrication gap. Calculate the clearances of all tappets and compare them to specifications. If the tappet clearances exceed the permissible limits, replace the tappets or head.