Valve Lifter "Ticking" Noise Caterpillar

Reference: August 27, 1997; Engine TIB; Component Code 1209; "Valve Lifter 'Ticking' Noise".

Problem:

3306C (9TL1-21893) Truck Engines valve lifters may produce a "ticking" noise that is evident at low idle speeds. This "ticking" noise is due to excessively worn valve lifter bodies. See the Reference TIB.

Solution:

Replace the former 2W-7043 Valve Lifter Assemblies (hourglass body) and 7E-9758 Lifter Guide Springs with 12 new 161-7299 Valve Lifter Assemblies (full body) and 6 new 161-1033 Lifter Guide Springs. One new lifter guide spring is used for each pair of cylinder block lifter bores for each cylinder. See the included illustration.

The former 2W-7043 Valve Lifter Assemblies could be removed and installed in the cylinder block lifer bores by using a hook on the former 7E-9758 Lifter Guide Springs. The new 161-7299 Valve Lifter Assemblies must be removed and installed with a strong magnet at the end on and extension rod. The new lifter guide springs can be installed with long needle nosed pliers. Each new lifter guide spring straddles the cylinder block webbing between the two lifter bores per cylinder. The lifter guide spring must be pushed downward into the cylinder block lifter bores as far as possible. The lifter guide springs must be installed prior to installation of the valve lifter assemblies. The lifter guide spring can not be removed before the valve lifter assemblies.

On an engine with worn cylinder block lifter bores, particularly when the former valve lifter were the "hour glass design", the lifter bores must be thoroughly cleaned before installing the new valve lifter assemblies and new lifter guide springs. Use clean engine oil to generously lubricate the new valve lifter assemblies before installation. Be sure to align the full length guide slot in the valve lifter assemblies with the "guide leg" of the new lifter guide springs. This will keep the valve lifter assembly roller in correct alignment with the cam lobe.

VALVE MECHANISM GROUP WITH NEW 161-7299 VALVE LIFTER ASSEMBLIES (1)

AND NEW 161-1033 LIFTER GUIDE SPRINGS (2)

Cylinder Block (A),

Camshaft (B)

Please share this information with your TEPS Dealers.

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