Special Tools

EN-47719:  Tensioner Compressor

For equivalent regional tools, refer to Special Tools .

Fig 1: View Of Crankshaft Sprocket
Courtesy of GENERAL MOTORS CORP.
1. Install the crankshaft sprocket.
2. Apply prelube to the crankshaft sprocket thrust surface. Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended lubricant.
Fig 2: View Of Timing Chain Tensioner & Bolts
Courtesy of GENERAL MOTORS CORP.
3. Install the timing chain tensioner.
CAUTION: Refer to Fastener Caution .
4. Install the timing chain tensioner bolts and tighten to 21 N.m (15 lb ft).
Fig 3: Identifying Tensioner Collapsing Procedure
Courtesy of GENERAL MOTORS CORP.
5. Using the EN-47719:  compressor, fully collapse the tensioner, and place the tensioner retaining pin into the retaining hole (1).
Fig 4: Identifying Timing Chain & Sprockets
Courtesy of GENERAL MOTORS CORP.
6. Align the dowel in the camshaft position actuator with the dowel hole in the camshaft.
Fig 5: Identifying Camshaft Position Actuator & Fasteners
Courtesy of GENERAL MOTORS CORP.
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.