Timing Chain and Sprocket Installation for Chevrolet Impala 2009

Special Tools

EN-47719 Tensioner Compressor

For equivalent regional tools, refer to Special Tools.

1. Install the crankshaft sprocket.
2. Apply prelube GM P/N 12345501 (Canadian P/N 992704) or the equivalent to the crankshaft sprocket thrust surface.



3. Install the timing chain tensioner.

Caution: Refer to Fastener Caution in the Preface section.

4. Install the timing chain tensioner bolts and tighten to 21 N·m (15 lb ft).



5. Using the EN-47719 compressor , fully collapse the tensioner, and place the tensioner retaining pin into the retaining hole (1).



6. Align the dowel in the camshaft position actuator with the dowel hole in the camshaft.




Caution: Use only a Torx Plus® Bit when removing or installing the camshaft position actuator fasteners (1). The Torx Plus® design differs from typical Torx® fastener. Use of a standard Torx® bit on Torx Plus® fasteners may result in a rounded out fastener head or incorrect faster torque.

Note: DO NOT use any type of threadlocking compound on the camshaft position actuator mounting bolts. Usage of a threadlocking compound on the threads could lead to contamination of the camshaft position actuator, possibly resulting in potential damage to the actuator.

7. Draw the camshaft sprocket onto the camshaft using the mounting bolts and tighten the bolts to 16 N·m (12 lb ft).
8. Remove the tensioner retaining pin.
9. Coat the crankshaft and camshaft sprocket with engine oil.