Valve Tappets - Magnetization

911 (996)

4/98

1559

1

Binder - 1, Engine

05-15-98

Magnetization of Valve Tappets

Vehicle Type:
911 Carrera (996)

Model Year:
As of 1999 (X)

Concern:

Magnetization of the hydraulic valve tappets (lifters) can result in failure.

Information:

Magnetized tools or magnets must NOT be used during removal and installation of the valve tappets. This applies to all valve tappets that are to be reused.

The magnetic properties of a magnetized tool or magnet, if used during engine repairs, can cause the valve tappets to fail. For example, the ball of the check valve inside the valve tappet may become magnetized and stick.

When performing engine repairs, only use a suitable non-magnetic tool such as a rubber suction cup (e.g. valve lapping tool) to remove and install the valve tappets.

Disregard all previous information referring to the use of magnetic tools on the valve tappets. Please update your Technical Manual with this information.

Literature:

911 Carrera (996) Technical Manual, Group 1, page 15 - 4