Timing Cover: Service and Repair

Engine Front Cover Replacement

Special Tools

J 37228 Seal Cutter

Removal Procedure




1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Single Battery) (Service and Repair)Battery Negative Cable Disconnection and Connection (Dual Batteries) (Service and Repair)Battery Negative Cable Disconnection and Connection (Auxiliary Battery) (Service and Repair).
2. Remove the water pump. Refer to Water Pump Replacement (LU3) (Service and Repair)Water Pump Replacement (LMM) (Service and Repair)Water Pump Replacement (V8) (Service and Repair).
3. Remove the crankshaft front oil seal. Refer to Crankshaft Front Oil Seal Replacement (Service and Repair).
4. Remove the right wheelhouse panel. Refer to Front Wheelhouse Liner Replacement - Right Side (Chevrolet) (Front Wheelhouse Liner Replacement - Right Side)Front Wheelhouse Liner Replacement - Right Side (GMC) (Front Wheelhouse Liner Replacement - Right Side).
5. Disconnect the crankshaft position (CKP) sensor electrical connector.




6. Remove the CKP sensor bolt and sensor.
7. Remove the CKP sensor spacer bolts and spacer.
8. Remove and discard the O-rings from the sensor and the spacer.




9. Remove the upper oil pan to engine front cover bolts.




10. Remove the engine front cover bolts.
11. Separate the engine front cover from the cylinder block and upper oil pan using J 37228 .

Note: Do not bend the turbocharger coolant pipe.

12. Remove the engine front cover.




13. If necessary, remove the pressure relief valve O-ring.
14. Clean and inspect the front cover. Refer to Engine Front Cover Cleaning and Inspection (44. Engine Front Cover Cleaning and Inspection).

Installation Procedure




1. If necessary, install a NEW pressure relief valve O-ring.
Caution: Refer to Fastener Caution (Fastener Caution).

2. Lubricate the O-ring with engine oil.

Tighten the valve to 39 Nm (29 lb ft).




3. Apply a 2-3 mm (1/8 in) wide by 0.5-1.5 mm (1/16 in) high, bead of sealant to the engine front cover sealing surface to the engine block. Refer to Adhesives, Fluids, Lubricants, and Sealers (Adhesives, Fluids, Lubricants, and Sealers) for the correct part number.
4. Apply a 2-3 mm (1/8 in) wide by 0.5-1.5 mm (1/16 in) high, bead of sealant to the engine front cover sealing surface to the upper oil pan. Refer to Adhesives, Fluids, Lubricants, and Sealers (Adhesives, Fluids, Lubricants, and Sealers) for the correct part number.




5. Install the engine front cover.
6. Install the engine front cover bolts.

Tighten the bolts to 25 Nm (18 lb ft).




7. Install the upper oil pan to engine front cover bolts.

Tighten the bolts to 21 Nm (15 lb ft).




8. Install a NEW O-ring to the CKP sensor spacer.
9. Lubricate the O-ring with clean engine oil.
Note: The crankshaft position sensor spacers are machined with different timing positions. However, if the crankshaft position sensor spacer requires replacement, replace with a grade "C" spacer.

10. Install the CKP sensor spacer and bolts.

Tighten the bolts to 10 Nm (89 lb in).

11. Install a NEW O-ring to the CKP sensor.
12. Lubricate the O-ring with clean engine oil.
13. Install the CKP sensor and bolt.

Tighten the bolt to 10 Nm (89 lb in).




14. Connect the CKP sensor electrical connector.
15. Install the right wheelhouse panel. Refer to Front Wheelhouse Liner Replacement - Right Side (Chevrolet) (Front Wheelhouse Liner Replacement - Right Side)Front Wheelhouse Liner Replacement - Right Side (GMC) (Front Wheelhouse Liner Replacement - Right Side).
16. Install the crankshaft front oil seal. Refer to Crankshaft Front Oil Seal Replacement (Service and Repair).
17. Install the water pump. Refer to Water Pump Replacement (LU3) (Service and Repair)Water Pump Replacement (LMM) (Service and Repair)Water Pump Replacement (V8) (Service and Repair).
18. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Single Battery) (Service and Repair)Battery Negative Cable Disconnection and Connection (Dual Batteries) (Service and Repair)Battery Negative Cable Disconnection and Connection (Auxiliary Battery) (Service and Repair).