SERVICE MANUAL UPDATE SEC. 6A2 CAM SHAFT TIMING PULLEY

Subject: CAMSHAFT TIMING PULLEYS INSTALLATION

Model & Year: 1990-91 GEO PRIZM GSI WITH 1.6L ENGINE

The information contained in this bulletin is an addition to the "Timing Belt and Camshaft Timing Pulleys" procedure found in 4A-GE Engine Mechanical (6A2) of the 1990 GEO Prizm Service Manual Supplement covering the Prizm GSI model (ST373-90 Supp.) and the "Timing Belt and Camshaft Timing Pulleys" procedure found in Engine Mechanical - 1.6L L4 VIN Code 6 (Section 6A2) of the 1991 Service Manual Supplement (ST373-91).

When installing the camshaft timing pulleys, make sure that the camshaft knock pins are properly aligned in the camshaft timing pulleys and that the timing marks on the camshaft timing pulleys are aligned with the timing marks located on the timing belt rear cover (Figure 1).

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.