Variable Camshaft Timing (VCT) Housing: Installation
Installation of the RH secondary timing chain tensioner
- 1.NOTE: The following 10 steps are only for the installation of the RH secondary timing chain tensioners. Do not reuse the secondary timing chain tensioners if removed, or damage to the engine may occur.NOTE: Do not remove the secondary timing chain tensioner shipping clip, until instructed to do so.
Apply clean engine oil to the secondary timing chain tensioner O-ring seals and mega cap bore.
- 2.NOTE: Do not remove the secondary timing chain tensioner shipping clip, until instructed to do so.
Install the RH secondary timing chain tensioner by pushing it down all the way until a snap is heard and the tensioner is seated all the way down the mega cap bore.
- 6.NOTE: It may be necessary to rotate the camshafts slightly, to install the RH secondary timing assembly.
Position the RH VCT units and secondary timing chain onto the camshafts by aligning the holes in the VCT units with the dowel pins in the camshafts.
- 7.
Install the new RH VCT unit bolts and tighten in 4 stages.- 1.
Stage 1: Tighten to 40 Nm (30 lb-ft).
- 2.
Stage 2: Loosen one full turn.
- 3.
Stage 3: Tighten to 25 Nm (18 lb-ft).
- 4.
Stage 4: Tighten an additional 180 degrees.
- 1.
- 8.
Activate the RH secondary timing chain tensioner by pressing down on the secondary timing chain and tensioner top shoe until it bottoms out, let go of the tensioner and it will spring up putting tension on the chain.
- 9.NOTE: Do not use excessive force when installing the VCT oil control solenoid. Damage to the mega cap could cause the cylinder head to be inoperable. If difficult to install the VCT oil control solenoid, inspect the bore and VCT oil control solenoid to ensure there are no burrs, sharp edges or contaminants present on the mating surface. Only clean the external surfaces as necessary.NOTE: A slight twisting motion will aid in the installation of the VCT oil control solenoid.NOTE: Keep the VCT oil control solenoid clean of dirt and debris.
Install the RH exhaust VCT oil control solenoid and tighten the bolt.
- 1.
Stage 1: 71 lb.in (8 Nm)
- 2.
Stage 2: Tighten an additional 20 degrees.
- 1.
RH VCT unit
- 12.NOTE: It may be necessary to rotate the camshafts slightly, to install the RH VCT units.
Position the RH VCT units and secondary timing chain onto the camshafts by aligning the holes in the VCT units with the dowel pins in the camshafts.
- 13.
Install the new RH VCT unit bolts and tighten in 4 stages.- 1.
Stage 1: Tighten to 40 Nm (30 lb-ft).
- 2.
Stage 2: Loosen one full turn.
- 3.
Stage 3: Tighten to 25 Nm (18 lb-ft).
- 4.
Stage 4: Tighten an additional 180 degrees.
- 1.
- 14.NOTE: Make sure the secondary timing chain is centered on the timing chain tensioner guides.NOTE: The VCT oil control solenoids are removed for clarity.
Remove the Chain Tensioner Hold Down Tool.
Installation of the LH secondary timing chain tensioner
- 15.NOTE: The following 10 steps are only for the replacement of the secondary timing chain tensioners. Do not reuse the secondary timing chain tensioners if removed, or damage to the engine may occur.NOTE: Do not remove the secondary timing chain tensioner shipping clip, until instructed to do so.
Apply clean engine oil to the secondary timing chain tensioner O-ring seals and mega cap bore.
- 16.NOTE: Do not remove the secondary timing chain tensioner shipping clip, until instructed to do so.
Install the LH secondary timing chain tensioner by pushing it down all the way until a snap is heard and the tensioner is seated all the way down the mega cap bore.
- 20.
Position theLH VCT units and secondary timing chain onto the camshafts by aligning the holes in the VCT units with the dowel pins in the camshafts.
- 21.
Install the new LH VCT unit bolts and tighten in 4 stages.- 1.
Stage 1: Tighten to 40 Nm (30 lb-ft).
- 2.
Stage 2: Loosen one full turn.
- 3.
Stage 3: Tighten to 25 Nm (18 lb-ft).
- 4.
Stage 4: Tighten an additional 180 degrees.
- 1.
- 22.
Activate the LH secondary timing chain tensioner by pressing down on the secondary timing chain and tensioner top shoe until it bottoms out, let go of the tensioner and it will spring up putting tension on the chain.
- 23.NOTE: Do not use excessive force when installing the VCT oil control solenoid. Damage to the mega cap could cause the cylinder head to be inoperable. If difficult to install the VCT oil control solenoid, inspect the bore and VCT oil control solenoid to ensure there are no burrs, sharp edges or contaminants present on the mating surface. Only clean the external surfaces as necessary.NOTE: A slight twisting motion will aid in the installation of the VCT oil control solenoid.NOTE: Keep the VCT oil control solenoid clean of dirt and debris.
Install the LH exhaust VCT oil control solenoid and the bolt.
LH variable camshaft timing (VCT) unit
- 26.NOTE: It may be necessary to rotate the camshafts slightly, to install theLH VCT units.
Position theLH VCT units and secondary timing chain onto the camshafts by aligning the holes in the VCT units with the dowel pins in the camshafts.
- 27.
Install the newLH VCT unit bolts and tighten in 4 stages.- 1.
Stage 1: Tighten to 40 Nm (30 lb-ft).
- 2.
Stage 2: Loosen one full turn.
- 3.
Stage 3: Tighten to 25 Nm (18 lb-ft).
- 4.
Stage 4: Tighten an additional 180 degrees.
- 1.
- 28.NOTE: Make sure the secondary timing chain is centered on the timing chain tensioner guides.NOTE: The VCT oil control solenoids are removed for clarity.
Remove the Chain Tensioner Hold Down Tool.
All variable camshaft timing (VCT) unit
- 29.
Install the timing chain. Refer to Timing Chain .