Timing Drive Components: Installation
WARNING: This page is about a different variant/trim than selected.
CAUTION:
Timing chain procedures must be followed exactly or damage to valves and pistons will result.
- Compress the tensioner using a soft-jawed vice.
- While holding the ratchet mechanism with a pick, push the ratchet arm back into the tensioner housing.
- Install a paper clip on the tensioner to hold the plunger in during installation.
- If copper links are not visible, mark two links on one end and one link on the other end, and use as timing marks.
- On engines equipped with bolt-on sprockets, install the camshaft sprocket (2).
- Install the bolt (1).
- Tighten the bolt.
- M10 bolt: Tighten in two stages.
- Stage 1: Tighten to 40 Nm (30 lb-ft).
- Stage 2: Tighten an additional 90 degrees.
- M12 bolt: Tighten to 120 Nm (90 lb-ft).
- M10 bolt: Tighten in two stages.
- Install the timing chain guides.
- Preposition the camshafts.
- Rotate the LH camshaft with the Camshaft Positioning Tool until the timing mark is approximately at 12 o'clock.
- Rotate the RH camshaft with the Camshaft Positioning Tool until the timing mark is approximately at 11 o'clock.
- Tighten the Camshaft Holding Tool to maintain camshaft propositioning.
- Position the crankshaft with the special tool, remove the tool.
- Install the crankshaft sprocket, marking sure the flange faces forward.
- Install the lower end of the LH (inner) timing chain, aligning the timing marks.
- Install the LH timing chain on the camshaft sprocket with the two chain (marked) links and the timing marks aligned.
- Install the RH (outer) timing chain on the crankshaft sprocket.
- Position the timing chain on the camshaft sprocket. Make sure the two copper-colored (marked) links align with the camshaft sprocket timing mark.
- Position the LH and RH timing chain tensioner arms on the dowel pins. Position the timing chain tensioners and install the bolts.
- Remove the retaining clips from the RH and LH timing chain tensioners.
- Check for correct alignment of all timing marks.
- Remove the special tools from the camshafts.
- Install the crankshaft sensor ring on the crankshaft.
- Lubricate the balance shaft journals with clean engine oil.
- Using the index mark on the balance shaft, mark the corresponding gear tooth with chalk.
- Position the balance shaft on the journals.
- Align the chalk mark on the balance shaft with the camshaft timing mark as shown.
- Install the bearing caps in their original location. Install the bolts and tighten the bolts in the sequence shown.
- Install engine front cover. Refer to Engine Front Cover .
NOTE:
There are 61 links in each timing chain.
NOTE:
Slightly loosen the Camshaft Holding Tool to allow slight camshaft movement.
CAUTION:
Rotate the crankshaft counterclockwise only. Do not rotate past the position shown or severe piston and/or valve damage can occur.
NOTE:
Be sure the upper half of the timing chain is below the tensioner guide dowel. If necessary, use the Camshaft Positioning Tool to adjust.
CAUTION:
The camshaft sprocket can jump time if the Camshaft Holding Tool is not secured.
NOTE:
Be sure the chain link and crankshaft sprocket timing marks are aligned.
NOTE:
The lower half of the timing chain must be positioned above the dowel.
NOTE:
The LH timing chain tensioner arm has a bump near the dowel hole, for identification.
NOTE:
It may be necessary to use an inspection mirror to see the marks.