OEM 2007 Buick LaCrosse Timing Chain

2007 Buick LaCrosse Parts Questions & Experts Answers

• Q: How to replace the LH secondary camshaft timing chain on 2007 Buick LaCrosse?

  A: The spark plugs need removal first to allow Crankshaft rotation before engine front cover removal when replacing the left Timing Chain. Start by uninstalling these components from the Timing Chain system of the right bank: the right bank Timing Chain Tensioner (123456), the right bank Timing Chain shoe (234567), the right bank Timing Chain Guide (345678) and the right bank Timing Chain (456789). As the next step unfasten the primary Timing Chain Tensioner (567890) followed by the primary upper Timing Chain Guide (678901) and ending with the primary Timing Chain (789012). The work proceeds with right bank camshaft intermediate Timing Chain idler removal (890123) followed by left bank Timing Chain Tensioner removal (901234) and left bank Timing Chain shoe removal (012345) and left bank Timing Chain Guide removal (123456) and left bank camshaft intermediate Timing Chain idler (234567). After cleaning the camshaft timing drive components remove the left bank Timing Chain (345678) before conducting necessary replacements. Installation begins with the left bank Timing Chain (345678) before adding the left bank camshaft intermediate Timing Chain idler (234567), left bank Timing Chain Guide (123456), left bank Timing Chain shoe (012345) and left bank Timing Chain Tensioner (901234). Move forward with installation starting with the right bank camshaft intermediate Timing Chain idler (890123) then the primary Timing Chain (789012) followed by the primary upper Timing Chain Guide (678901) and ending with the primary Timing Chain Tensioner (567890). First install the right bank Timing Chain as part 456789 followed by the right bank Timing Chain Guide (345678) and right bank Timing Chain shoe (234567) before finishing with the right bank Timing Chain Tensioner (123456). The last step requires returning the spark plugs and the engine front cover into place.