Engine - Metallic Ticking Noise

Classification:
EC87-013

Reference:
TS87-151

Date:
October 19, 1987

CA16DE TICKING NOISE

SERVICE INFORMATION

Some 1987 Pulsars with the CA16DE engine may exhibit a metallic ticking noise which sounds similar to a collapsed hydraulic lifter. The noise is most noticeable at low engine RPM with the engine at normal operating temperature.

SERVICE PROCEDURE





This noise could be the result of movement between the crank angle sensor spline and the drive spline on the exhaust camshaft. To verify the source, push in on the rubber plug at the center of the crank angle sensor (see Figure 1). This should change or eliminate the noise. If it does not, contact the FIX system. If it does, use the following procedure to correct this condition.

1. Remove the upper timing belt cover using the procedure on pages MA-31 and MA-32 of 1987 Pulsar Service Manual.





2. Verify the proper timing belt tension. The timing belt tension is correct when the belt can be twisted 90° by hand between the exhaust camshaft and the idler pulley as shown in Figure 2.

If the belt can be twisted more than 90°, the tension needs to be adjusted as follows.

^ Loosen the tensioner pulley nut while holding the tensioner in position with an allen wrench.





^ Apply light pressure to the allen wrench in a counterclockwise direction. Hold the tensioner in this position and tighten the pulley nut.

^ Rotate the crank shaft two complete turns and re-check the belt tension.

3. Install the timing belt cover, engine mount bracket, and water pump pulley.

4. Inspect the flat washer of the three crank angle sensor mounting bolts for bending. If there is any sign of bending, replace the bolts with new bolts, P/N 08360-62062, and washers, P/N 22118-51E00.

5. Inspect the crank angle sensor splines for signs of grease. If no grease is present, add 0.25cc (approximately the volume of a dime), of high temperature (melting temperature above 450°F), multipurpose grease inside the spline.

6. Install the crank angle sensor. Align the marks on the sensor and the timing belt cover that were made when the sensor was removed, (see Step 1).

7. Torque the three mounting bolts.

NOTE:
It is very important that the bolts be torqued to the proper specification, 5.1-5.8 ft-lb (0.7-0.8kg-m, 7-8 N-M).

8. Install drive belts, upper radiator hose, and refill the coolant.





PARTS INFORMATION

CLAIMS INFORMATION

Refer to Warranty Flat Rate Manual, Section AE, Key No. 18.