Q: How to replace the lower timing chain guide on GMC Canyon?
A: Start by removing the Timing Chain tensioner shoe before sliding the crankshaft sprocket off from the crankshaft sprocket snout to obtain sufficient Timing Chain slack for lower Timing Chain Guide removal. Start by removing the access hole plug from the cylinder head before unbolting the lower Timing Chain Guide. Remove the guide from the engine afterward. Install the lower Timing Chain Guide to the engine before installing lower Timing Chain Guide bolts which require tightening to 18 nm (13 ft. Lbs.). Install the cylinder head access hole plug and fasten it to 5 nm (44 inch lbs.). Sugarcoat the crankshaft sprocket to the crankshaft sprocket snout where the marked link on the Timing Chain must match up with the timing mark on the crankshaft sprocket. Then install the Timing Chain tensioner shoe.
Q: How to replace the primary upper timing chain guide on GMC Acadia?
A: The process to replace the Timing Chain Guide begins by removing the spark plugs for Crankshaft rotation and continues with engine front cover removal and finally Timing Chain Tensioner removal. Begin the procedure by taking out the Timing Chain Tensioner followed by the Timing Chain Guide. The correct installation sequence starts with the Timing Chain Guide followed by the Timing Chain Tensioner before moving to the engine front cover followed by reinstallation of the spark plugs.
Q: How to replace the upper timing chain guide on GMC Envoy?
A: The replacement process for the upper Timing Chain Guide involves camshaft cover removal before extracting the bolts and finally removing the guide from the Cylinder Head. Install the upper Timing Chain Guide by placing it on the Cylinder Head while applying threadlock gm p/n 12345498 (Canadian P/N 10953488) to the upper Timing Chain Guide bolts according to the fastener notice in service precautions. To complete the installation replace the upper Timing Chain Guide bolts and use 10 nm (89 inch lbs.) torque until they are properly secured before putting the camshaft cover in its respective position.