Hi, I’m Cody Smith, Technical Support Manager for Cloyes Gear and Products. In this video I’m going to show you how
to service the timing chain components in the GM High-feature V6 engines from 2007 to 2015 as of mid-2016. We will be using Cloyes aftermarket replacement components. Components we are going to be using today. This is the 9-0753S kit. It will contain the chains, tensioners, guides,
the idler sprockets, and the crank sprocket. The timing component service of this engine
can be done with the engine in the vehicle. To begin remove the intake manifold, the camshaft
covers, and the front engine cover to access the timing drives. Once the chain drives are accessible, rotate
the engine to the stage two timing position. Align the crankshaft sprocket timing dot to the dot on the oil pump at about the eight o’clock position. A key point about this application the timing system is composed of three drives subsystems and uses two stages for timing alignment. Stage one aligns the left bank secondary and
primary drive systems, and stage two aligns the right bank secondary drive system. Note, once the chains are removed, take care
when rotating the shafts individually. This is an interference engine. We’ll begin with the removal of the right
bank secondary drive system. Remove the right bank secondary camshaft drive
chain tensioner, tensioner guide, chain guide, and then the chain. Now that the right hand bank components are
removed, rotate the engine to the stage one timing position. Align the timing mark on the crank sprocket
to the timing mark on the oil pump at about the five o’clock position. Next we are ready to remove the primary drive system. Remove the primary chain tensioner, the upper
guide, and then the primary timing chain. Note that we are leaving the primary guide
in place. Later we will discuss the reason for this. Remove the right hand idler sprocket. We are now ready to remove the left bank secondary
drive system. Remove the left bank secondary chain tensioner, the chain guide, the tensioner guide, then the chain. the left hand idler sprocket. Now remove and replace the crank sprocket. Now is the time to remove and replace the
VVT cam phasers if necessary. During the replacement of the phasers, use
a wrench on the camshafts hex features to hold the shafts while removing & torqueing
the camshaft bolts. Re-torque the new bolts to 43 foot pounds. Before we start the installation I have a
few things to show you. All 3 timing chains have colored timing links. The two secondary will have two similarly
marked links that align to the camshafts, and the one unique marked link that aligns
to each respective idler. The primary chain has 3 uniformly marked links
that align to the two idlers and crankshaft. The marked links on the primary chain are
evenly spaced so alignment is symmetric. The tensioners are shipped in the deactivated
state with the activation pins installed. They must be installed in this deactivated
state or damage will occur. In the event of installing a tensioner that
has already been activated, you must go through the deactivation procedure. To deactivate a tensioner that has been activated
remove the piston assembly from the tensioner housing, and compress and turn clockwise on
the ratcheting cage mechanism until it stops. Now reinsert the piston assembly into the
housing, compress, and insert the pin. Note the tensioners are also shipped with
the gaskets that utilize a tab feature to index the tensioner bolt threads. It is best to install the gaskets with the
tensioner bolts before installation on the engine. The lower primary guide that we left on engine
during timing component removal is attached using critically torqued oil pump attachment
bolts. Unless you are servicing the oil pump it is
best to not remove the lower guide bolts, because it will disturb the oil pump’s properly
torqued two-piece housing. Cloyes recommends replacing the nylon shoe
using the nylon from the provided guide assembly in the kit. Use a small tool to separate and remove the
nylon shoes from the steel guide brackets, and reinstall the new nylon shoe on the engines
original bracket. We will start the assembly with the left bank
secondary drive system. Install left bank camshaft drive chain along
with the intermediate drive chain idler. Align the similarly marked links of the chain
to the “L” timing marks of the VVT cam sprockets, and the unique marked chain link
will align with the hole on the intermediate idler. Torque the idler bolt to 43 foot pounds. Install left bank tensioner guide. Torque the bolts to 18 foot pounds. Next install the chain guide. Once again torque to bolts to 18 foot pounds. Install left bank secondary tensioner and
install the attachment bolts to 18 foot pounds. Re-check timing alignment, and pull the pin
to activate. Now we are ready to assemble the primary drive
system. Install the right bank intermediate idler,
and torque the bolt to 43 foot pounds. Install primary camshaft drive chain. Align the marked links of the chain to the
timing marks of all three shaft sprockets. Install primary upper chain guide, and torque
to 18 foot pounds. Install the primary chain tensioner, and you
guessed it, torque the bolts to 18 foot pounds. Verify the timing alignment once again, and
pull pin to activate. Now with the left bank and primary systems
assemble, we are ready to install the right bank components. You are going to want to first rotate the
engine back to the stage 2 timing position. Align the timing mark on crank sprocket to
the timing mark on the oil pump at about the eight o’clock position. Install the right bank secondary chain. Align the similarly marked chain links to
the “R” timing marks of the VVT cam sprockets. Align the uniquely marked link to the hole
in the right hand idler sprocket. Now install the chain guide. Torque the bolts to 18 foot pounds. Install the tensioner guide. Torque bolts to 18 foot pounds. Install the right bank tensioner. Once again, torque bolts to 18 foot pounds. Re-check the timing alignment, and pull pin
to activate. You are now ready to reinstall your timing
cover, camshaft covers, and intake plenum using proper torque specs and tightening sequences. If you have any questions please call our
tech line. Please subscribe to our channel.