OEM 2005 Chevrolet Trailblazer Timing Cover

2005 Chevrolet Trailblazer Timing Cover Parts and Q&A

• Q: How to replace the engine front timing cover on 2005 Chevrolet Trailblazer?

  A: The procedure for replacing the engine front cover requires draining engine coolant followed by removal of cooling fan and shroud and Drive Belt and Water Pump and crankshaft balancer and Power Steering Pump. Before repositioning the vehicle start by elevating it and removing the Oil Pan. Loosen the engine front cover bolts but first remove the 7 mm center bolt located in the middle of the cover. Apply two cover alignment pins (J 44219) through the front cover bolts into jack screw holes to evenly secure the front cover and release it from the engine. Investigate the front cover by removing its two bolts and the Oil Pump before cleaning the parts. Install the engine front cover by applying a 3 mm (0.12 inch) bead of sealer gm p/n 12378521 to the backside trace grooves before the 10-minute application period. After applying sealant to the inside three bolt hole bosses on the cover, position the Oil Pump to match the crankshaft sprocket splines and install the front cover. Follow this order when installing front cover bolts: start with the outer bolts then finish with the center bolt torque to 10 nm (89 inch lbs.). Position the vehicle at its raised height before installing the Oil Pan followed by the Power Steering Pump and crankshaft balancer and Water Pump and finally the Drive Belt and cooling fan before the shroud installation. Complete this procedure by putting coolant into the engine compartment.