Servicing valve gear
Checking hydraulic bucket tappets
Special tools, workshop equipment, testers, measuring instruments and auxiliary items required
-
◆ Feeler gauge
-
◆ Wood or plastic wedge
Notes:
-
◆ Renew defective tappet complete (cannot be adjusted or repaired).
-
◆ Irregular valve noises when starting engine are normal.
Test sequence
-
‒ Start engine and run until the radiator fan has switched on once.
-
‒ Increase engine speed to about 2500 rpm for 2 minutes.
If the hydraulic tappets are still noisy, locate defective tappets as follows:
-
‒ Remove upper part of intake manifold and cylinder head cover.
-
‒ Rotate crankshaft clockwise on toothed belt sprocket securing bolt, until cam of the tappet to be checked is pointing upwards.
-
‒ Determine play between cam and bucket tappet.
|