Timing Components: Adjustments
Valve Timing, Adjusting
Special tools, testers and auxiliary items required
• Torque wrench 5-50 Nm (VAG 1331)
• Torque wrench 40-200 Nm (VAG 1332)
• Locking pin (T03006)
• Multipoint socket (T10035)
• Counter hold tool (T10172)
• Camshaft clamp (T40070)
• M8 x 16 bolt (Quantity: 2)
Modifying the counter hold tool (T10172)
- Remove the (T10172/1) and install bolts the M8 x 16 - A -.
• The valve timing must be adjusted if the camshaft sprockets were loosened during repairs or if the valve timing is not set.
Secure the Camshafts if the Valve Timing is Correct
- Remove the chain compartment cover. Refer to --> [ Chain Compartment Cover ] Service and Repair.
- Remove the cylinder head cover. Refer to --> [ Cylinder Head Cover ] Cylinder Head Cover.
- Lock the crankshaft for adjusting the valve timing. Refer to --> [ Crankshaft, Locking to Check/Adjust Valve Timing ] Crankshaft, Locking to Check / Adjust Valve Timing.
- Install the (T40070) as shown onto the camshafts and tighten the bolts to 20 Nm.
If the bolts could not be installed easily, attempt to rotate the exhaust camshaft at the recess using an open end wrench - A - (18 mm or 19 mm, depending on the wrench width) slightly in - direction of arrow - in order to eliminate any play in the timing chain.
- Relieve the tension on the timing chain. To do so, insert a screwdriver of appropriate size between the piston of timing chain tensioner and tensioning rail and press in - direction of arrow -.
- Secure the completely pressed in piston using the (T03006). Drift must be inserted until it stops.
Secure Camshafts if Valve Timing is Not Correct
- Remove the chain compartment cover. Refer to --> [ Chain Compartment Cover ] Service and Repair.
- Rotate the crankshaft to the Top Dead Center (TDC) of cylinder 5, refer to --> [ Crankshaft, Locking to Check/Adjust Valve Timing ] Crankshaft, Locking to Check / Adjust Valve Timing, however do not peg the crankshaft using the (T40069).
- Rotate the crankshaft so that the (T40070) can be installed easily onto the camshafts as shown.
- Tighten the bolts of the (T40070) to 20 Nm.
Remove the Camshaft Sprockets
- Relieve the tension on the timing chain. To do so, insert a screwdriver of appropriate size between the piston of timing chain tensioner and tensioning rail and press in - direction of arrow -.
- Secure the completely pressed in piston using the (T03006). (T03006) must be inserted until it stops.
- Remove the bolts - 1 - and - 4 - using the (T10035) and remove the adjuster - 2 - and sprocket - 3 -.
If necessary, the sprocket - 3 - must be pried off lightly using a screwdriver.
• Lock the crankshaft, refer to --> [ Crankshaft, Locking ] Crankshaft, Locking, if not yet locked. The crankshaft must only be rotated slightly around Top Dead Center (TDC) point for this. Otherwise there is a risk the valves rest on the pistons.
Valve Timing, Adjusting
• Crankshaft secured by the (T40069)
• Camshafts secured by the (T40070)
• Chain tensioner is tensioned
- Place the adjuster - 2 - and sprocket - 3 - as depicted into the timing chain, attach them onto the camshafts and install new bolts - 1 - and - 4 - hand tight.
The adjuster and sprocket must still be able to be rotated, however they must not tilt.
• Make sure that the timing chain lays correctly in the guide and tensioning rails.
- Relieve the tension on the timing chain tensioner by pressing in the piston and removing the (T03006).
- Install the modified (T10172) onto the exhaust camshaft sprocket - 4 -.
• A second mechanic is required for the following work steps.
- Hold the timing chain at preload by pressing the (T10172) in - direction of arrow -.
- Simultaneously tighten bolt - 2 - for the intake camshaft adjuster first and then the bolt - 3 - for the exhaust camshaft sprocket to 60 Nm.
Then tighten bolts - 2 - and - 3 - 90° (1/4 rotation) further.
• When applying the additional torque of 90°, the timing chain must no longer be held at preload.
- Remove the (T40070).
- Remove the (T40069) for locking the crankshaft.
- Turn the crankshaft 2 revolutions in engine running direction and lock the crankshaft, refer to --> [ Crankshaft, Locking to Check/Adjust Valve Timing ] Crankshaft, Locking to Check / Adjust Valve Timing.
- Check the valve timing. Refer to --> [ Valve Timing, Checking ] Testing and Inspection.
If the valve timing is not correct:
- Loosen the adjuster and sprocket bolts for the camshafts again and adjust the valve timing again (replace camshaft bolts).
The rest of the installation follows the reverse of the removal procedures. When doing this note the following:
• Remove the (T40069) from the cylinder block and install the locking bolt.
• Fill the cooling system. Refer to --> [ Draining and Filling ] [1][2]Cooling System, Draining and Filling.