Removal
Lower chain tensioner
1. Set the handbrake on the car, raise the front of the car and place it on stands.
2. Working from below, unscrew the two mounting bolts and remove the lower chain tensioner. Remove the gasket, paying attention to its original position.
Attention! When removing the tensioner, the crankshaft must not rotate.
Upper chain tensioner
1. Loosen the three mounting bolts and remove the right powertrain support bracket.
2. Unscrew the bolts and nuts and remove the cover of the driven camshaft sprockets, remove the gasket (if provided).
3. On early production engines, move the chain tensioner to the side and secure it with the hook located on the side of the shoe.
4. On later production engines, move the chain tensioner to the side and secure it with a rod, placing the rod between the shoe and the chain.
5. Unscrew the two bolts and remove the tensioner, taking it out of the cylinder head.
Attention! When removing the tensioner, the crankshaft must not rotate.
Lower chain tensioner
1. Remove the camshaft chains (see subsection 3.1.1.7).
2. Unscrew the two bolts and remove the lower chain guide.
Lower chain tensioner shoe
1. Remove the front cover (see subsection 3.1.1.6).
2. Loosen the axle bolt and remove the lower chain tensioner shoe.
Upper chain guide bar (for early production engines)
1. Remove the cylinder head cover (see subsection 3.1.1.4).
2. Unscrew the two bolts and remove the guide bar.
Upper chain tensioner (for early production engines)
1. Remove the camshaft sprocket inspection cover.
2. Unscrew the two bolts (indicated by arrows) and remove the upper chain guide.
Camshaft sprockets
1. Set the piston of the 1st cylinder to TDC of the compression stroke.
2. Remove the cylinder head cover.
3. Remove the camshaft sprocket cover.
4. Remove the camshaft sprockets and upper chain.
Intermediate sprocket and crankshaft drive sprocket
Remove the drive chains and sprockets (see subsection 3.1.1.7).
Checking the status
Cm. subsection 3.1.1.7.
Installation
Lower chain tensioner
1. Make sure the tensioner and cover mating surfaces are dry and clean.
2. Install the new gasket, aligning the notch in the gasket with the tensioner lubrication hole.
3. Install the tensioner and tighten the bolts to the specified torque.
Upper chain tensioner
1. On early production vehicles, the tensioner shoe should be moved aside and secured with a hook. Install the tensioner assembly onto the cylinder head. Tighten the tensioner mounting bolts to the specified torque, remove the hook (indicated by the arrow). Make sure that the tensioner shoe shoe is firmly pressed against the chain.
2. On late model vehicles, move the tensioner shoe aside and secure it with a rod. Install the tensioner and tighten the bolts to the specified torque. Remove the rod and make sure the tensioner shoe shoe is firmly against the chain.
3. Make sure that the sealing surfaces of the camshaft sprocket inspection cover and cylinder head are clean and free of moisture and oil. If a gasket was installed on the cover, replace the gasket by installing it on the cylinder head. If the seal was provided by a sealant, apply it along the entire perimeter of the cover in a continuous layer. Install the cover and tighten the bolts and nuts to the specified torque.
4. Install the bracket onto the right powertrain support and tighten the bolts to the specified torque.
Lower chain tensioner
1. Install the damper on the cylinder block.
2. Tighten the mounting bolts to the specified torque.
3. Install the chains.
Lower chain tensioner shoe
1. Install the shoe onto the cylinder block.
2. Tighten the axle bolt to the specified torque.
3. Install the front cover.
Upper chain guide bar (for early production engines)
1. Install the upper chain guide rail onto the cylinder head.
2. Tighten the mounting bolts to the specified torque.
3. Install the cylinder head cover.
Upper chain tensioner (for early production engines)
1. Install the upper chain guide onto the cylinder head.
2. Tighten the mounting bolts to the specified torque.
3. Install the camshaft sprocket cover.
Driven camshaft sprockets
1. Install the camshaft sprockets and upper chain.
2. On early production engines, install the guide bar and upper chain guide, tighten all bolts to the specified torque.
3. Install the upper chain tensioner.
4. Install the cylinder head cover.
Intermediate sprocket and crankshaft drive sprocket
Install the chains and sprockets.