Question 1

How to replace the LH secondary camshaft intermediate timing chain on Buick Enclave?

Accepted Answer

Start by removing the engine front cover before commencing left side Timing Chain replacement. Starting with the right bank Timing Chain Tensioner you must also remove right bank Timing Chain shoe and guide before proceeding. Start by taking out the right bank Timing Chain followed by removing the primary camshaft drive chain tensioner and then both the primary upper camshaft drive chain guide and primary camshaft drive chain. The following sequence requires removal of the right bank camshaft intermediate drive chain idler then the left bank Timing Chain Tensioner followed by the left bank Timing Chain shoe and guide. To perform the next step remove the left bank camshaft intermediate drive chain idler followed by the left bank Timing Chain. All timing drive components should receive cleaning and inspection before installation of required replacement parts. Begin installation by placing the left bank Timing Chain first then proceed with the left bank camshaft intermediate drive chain idler followed by the left bank Timing Chain Guide and left bank Timing Chain shoe and left bank Timing Chain Tensioner. You should begin by setting the right bank camshaft intermediate drive chain idler followed by installing the primary camshaft drive chain and primary upper camshaft drive chain guide and primary camshaft drive chain tensioner. Finish the installation by adding the right bank Timing Chain and its corresponding guides, shoes and tensioner which precedes the engine front cover replacement.

Question 2

How to replace the primary cam gear and timing chain on Buick LaCrosse?

Accepted Answer

It is important to remove the engine front cover when you want to replace the timing chain and sprockets. Next, pull out the right bank secondary camshaft drive chain tensioner, then the right bank secondary camshaft drive chain shoe, and finally, right bank secondary camshaft drive chain guide. And then, take the chains off from the right bank secondary camshaft drive and the Timing Chain Tensioner. Next, remove the timing chain upper guide and the timing chain. For installation, install the timing chain (120), primary upper camshaft drive chain guide (122) and Timing Chain Tensioner (123) respectively. Then install the right bank secondary camshaft drive chain (124), the right bank secondary camshaft drive chain guide (125), the right bank secondary camshaft drive chain shoe (126) and eventually the right bank secondary camshaft drive chain tensioner (127). Finish the process by replacing the engine front cover.

Question 3

How to Ensure Proper Installation of the Timing Chain on Buick Regal?

Accepted Answer

To off the Timing Chain and sprockets, start with the removal of the engine front cover. While the timing marks on the sprockets are aligned as closely as possible, one should take out the Timing Chain dampener bolt and the Timing Chain dampener. Next remove the camshaft sprocket bolt and then even camshaft sprocket and timing oints were removed; if you find it difficult to get the sprocket off, a light tap at the lower edge with a plastic mallet can come in handy. Make sure you remove the crankshaft sprocket and also the balance shaft drive gear to access the camshaft thrust plate, remove the camshaft thrust plate bolts and the thrust plate if required. If necessary, also remove the balance shaft driven gear bolt, and the driven gear. Check and clean all timing parts for wear and tear. If the pistons have moved, you turn the crankshaft with the number one piston at the top dead center position and camshaft at the right angle with the timer mark straight down while the sprocket is temporarily installed. For installation, if necessary, install the balance shaft driven gear and lock out balance shaft while installing and tighten the driven gear angle bolt to 22 nm (16 ft. Lbs.) and then use the balancer shaft driven gear (J 36660-A) to bolt on 70 degrees. Mount the camshaft thrust plate and its bolts are should be tightened to 15 nm (11 ft. Lbs.), followed by balance shaft drive gear. Lining up the timing marks on the balance shaft drive gear and the driven gear, crankshaft sprocket, Timing Chain, camshaft sprocket to line them up as close as possible. Apply and tighten the camshaft sprocket bolt to 100 nm (74 ft lbs) than apply the torque angle meter (J 36660-A) and enlarge the bolt by 90 degrees. Lastly, put on the Timing Chain dampener and its bolt and tighten it to 22 nm (16 ft. Lbs.), turn the engine two times to match the timing marks and replace the engine front cover.

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