Engine Front Cover Installation (LFW or LFX)

Special Tools 

EN-46109  Guide Pins

For equivalent regional tools, refer to Special Tools .

Fig 1: Cylinder Block Guide Studs
Courtesy of GENERAL MOTORS COMPANY
1. Install the 8 mm (0.315 in) guide from the EN-46109  pins into the cylinder block positions as shown.
Fig 2: Water Pump Seal
Courtesy of GENERAL MOTORS COMPANY
2. Install the NEW engine front cover to cylinder block seal.
Fig 3: RTV Sealant
Courtesy of GENERAL MOTORS COMPANY
3. Ensure proper use of room temperature vulcanizing (RTV) sealant. Use of Room Temperature Vulcanizing (RTV) and Anaerobic Sealant
4. Place a 3 mm (0.118 in) bead of RTV sealant on the engine front cover as shown (1). Refer to Adhesives, Fluids, Lubricants, and Sealers for recommended sealant.
Fig 4: Engine Front Cover
Courtesy of GENERAL MOTORS COMPANY
5. Place the engine front cover (1) onto the EN-46109  pins and slide into position.
6. Remove the EN-46109  pins from the cylinder block.
7. Hand start all the engine front cover bolts.
Fig 5: Engine Front Cover Bolt Tightening Sequence
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

Refer to Fastener Caution .

NOTE:

Engine front cover bolts in the number (25) location are model dependent and may not apply.

8. Tighten the engine front cover bolts (1-23) in the sequence shown to 20 N.m (14 lb ft).
   1. Tighten the engine front cover bolts (1-23) a second pass in sequence to 20 N.m (14 lb ft).
   2. Tighten the engine front cover bolts (1-23) a third pass in sequence an additional 60 degrees.
9. Tighten the engine front cover bolts (24) to 15 N.m (11 lb ft).
10. Tighten the engine front cover bolts (25) to 65 N.m (48 lb ft).
Fig 6: Camshaft Position Actuator Valve And Bolts
Courtesy of GENERAL MOTORS COMPANY
11. Place the camshaft position actuator valves (2) in position on the front cover.
12. Install the camshaft position actuator valve bolts (1) and tighten to 10 N.m (89 lb in).
Fig 7: Camshaft Position Sensors & Bolts
Courtesy of GENERAL MOTORS COMPANY
NOTE:

Inspect the camshaft position sensor O-ring seals. If the seals are damaged, the entire camshaft position sensor must be replaced.

13. Place the camshaft position sensors (2) in position on the front cover.
14. Install the camshaft position sensor bolts (1) and tighten to 10 N.m (89 lb in).