---------- All 1991 LeMans built prior to VIN number MB310984 were built without a timing pointer in the cam belt cover (refer to the 1991 LeMans Service Manual, page 6Al-l2 Figure 13, item number 5) . If a timing light is being used, this pointer is required to set the ignition timing correctly. If available, a magnetic timing probe may be used instead of a timing light since a magnetic probe locator bushing is provided in the engine block.
If a timing light is to be used, a pointer must be obtained and installed in the specified hole in the cam belt cover. This pointer is available upon request, without charge, from the Pontiac Technical Assistance Center (TAC) by calling 1-800-742-4636.
To provide access to the timing pointer location hole in the cam belt cover, the right hand lower engine compartment plastic splash shield must be removed. With the splash shield removed, the timing pointer hole in the cam belt cover is visible through the right hand front wheelhouse opening. Looking directly at the crankshaft pulley, the hole will be visible at approximately the "two o'clock" position. If the hole in the cam belt cover is dirty, it will be necessary to first clean the hole before installing the timing pointer. Prior to positioning the timing pointer into the hole in the cam belt cover, a small amount of Loctite #290 Super Bond, or equivalent should be put on the pointer to positively retain it in the cam belt cover hole. The pointer must be fully seated into the hole to assure proper location of the pointer.
Labor Operation Number: T1698 Labor Time : 0.4 Hours
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.