Secondary Timing Chain Tensioner Installation - Right Side

Special Tools

• EN 46112:  Tensioner Retraction Pins
• J 45027:  Tensioner Tool

For equivalent regional tools, refer to Special Tools .

Fig 1: Identifying Left & Right Secondary Camshaft Drive Chain Tensioner & Primary Camshaft Drive Chain Tensioner
Courtesy of GENERAL MOTORS CORP.
1. Ensure that the right secondary camshaft drive chain tensioner (1) is being installed.
Fig 2: Resetting Left Secondary Camshaft Drive Chain Tensioner Plunger With J 45027
Courtesy of GENERAL MOTORS CORP.
2. Using the J 45027:  tool, reset the right secondary camshaft drive chain tensioner plunger.
Fig 3: Installing Plunger Into Right Secondary Camshaft Drive Chain Tensioner Body
Courtesy of GENERAL MOTORS CORP.
3. Install the plunger into the right secondary camshaft drive chain tensioner body.
Fig 4: Identifying EN 46112
Courtesy of GENERAL MOTORS CORP.
4. Compress the plunger into the body and lock the right secondary camshaft drive chain tensioner by inserting the EN 46112:  pins into the access hole in the side of the right secondary camshaft drive chain tensioner body.
5. Slowly release pressure on the right secondary camshaft drive chain tensioner. The right secondary camshaft drive chain tensioner should remain compressed.
Fig 5: Identifying Right Secondary Camshaft Drive Chain Tensioner Gasket
Courtesy of GENERAL MOTORS CORP.
6. Install a NEW right secondary camshaft drive chain tensioner gasket to the right secondary camshaft drive chain tensioner.
7. Install the right secondary camshaft drive chain tensioner bolts through the right secondary camshaft drive chain tensioner and gasket.
8. Ensure the right secondary camshaft drive chain tensioner mounting surface on the right cylinder head does not have any burrs or defects that would degrade the sealing of the NEW right secondary camshaft drive chain tensioner gasket.
Fig 6: View Of Secondary Camshaft Drive Chain Tensioner And Bolts
Courtesy of GENERAL MOTORS CORP.
9. Place the right secondary camshaft drive chain tensioner into position and loosely install the bolts to the block.
Fig 7: Identifying Right Secondary Camshaft Drive Chain Tensioner Gasket Tab
Courtesy of GENERAL MOTORS CORP.
CAUTION: Refer to Fastener Caution .
10. Verify the proper placement of the right secondary camshaft drive chain tensioner gasket tab (1).
    1. First Pass

       Tighten the right secondary camshaft drive chain tensioner bolts to 5 N.m (44 lb in) .

    2. Final Pass

       Tighten the right secondary camshaft drive chain tensioner bolts to 25 N.m (18 lb ft) .

Fig 8: Identifying Right Camshaft Drive Chain Tensioner
Courtesy of GENERAL MOTORS CORP.
11. Release the right camshaft drive chain tensioner by pulling out the EN 46112:  pins and unlocking the tensioner plunger.
CAUTION: Ensure that all timing chain tensioners are completely released. A timing chain tensioner that is not properly released can lead to serious engine damage.
12. Verify all primary and secondary camshaft drive chain timing mark alignments. Refer to Camshaft Timing Drive Chain Alignment Diagram - Stage Two.