Grand Cherokee 2WD L6-4.0L VIN S (1997)
Camshaft Gear/Sprocket: Service and Repair
Pin Replacement
Removal
WARNING: DO NOT LOOSEN THE RADIATOR DRAIN COCK WITH THE SYSTEM HOT AND PRESSURIZED BECAUSE SERIOUS
BURNS FROM COOLANT CAN OCCUR.
1. Disconnect negative cable from battery.
2. Drain the radiator. DO NOT waste reusable coolant. Drain the coolant into a clean container.
3. Remove the fan and shroud.
4. Disconnect the radiator overflow tube, radiator hoses, automatic transmission fluid cooler pipes (if equipped).
5. Remove the radiator.
6. If equipped with air conditioning:
CAUTION: DO NOT loosen or disconnect any air conditioner system fittings. Move the condenser and receiver/drier aside as a complete
assembly.
a. Remove the A/C compressor serpentine drive belt idler pulley.
b. Disconnect and remove the generator.
c. Remove the A/C condenser attaching bolts and move the condenser and receiver/drier assembly up and out of the way.
7. Remove the serpentine drive belt.
8. Remove the crankshaft vibration damper.
9. Remove the timing case cover. Clean the gasket material from the cover.
10. Remove the thrust pin and tension spring from the preload bolt head.
11. Rotate crankshaft until the crankshaft sprocket timing mark is closest to and on the center line with the camshaft sprocket timing mark.
12. Remove the camshaft sprocket preload retaining bolt and washer.
13. Remove the crankshaft oil slinger.
14. Remove the sprockets and chain as an assembly.
CAUTION: The following procedural step must be accomplished to prevent the camshaft from damaging the rear camshaft plug during pin
installation.
15. Inspect the damaged camshaft pin.
16. If the pin is a spring-type pin, remove the broken pin by inserting a self-tapping screw into the pin and carefully pulling the pin from the camshaft.
17. If the pin is a dowel-type pin, center-punch it. Ensure the exact center is located when center-punching the pin.
CAUTION: Cover the opened oil pan area to prevent metal chips from entering the pan.
18. Drill into the pin center with a 4 mm (5/32 inch) drill bit.
19. Insert a self-tapping screw into the drilled pin and carefully pull the pin from the camshaft.
Installation
1. Clean the camshaft pin hole.
2. Compress the center of the replacement spring pin with vise grips.
3. Carefully drive the pin into the camshaft pin hole until it is seated.
