Oil Pump: Adjustments

Valve timing, adjusting





Special tools, testers and auxiliary items required
^ Torque wrench V.A.G 1331
^ Torque wrench V.A.G 1332
^ Securing pin T03006
^ Multi-point socket T10035
^ Counter-holder tool T10172
^ Camshaft locator T40070
^ 2 bolts M8x16

Modify Counter hold T10172





- Remove adapter T10172/1 and install bolts - A - M8x16.

Note:
^ The valve timing must be adjusted if the camshaft chain sprockets were loosened during repairs or if the valve timing is not set.

Secure camshafts if valve timing is correct
- Remove chain case cover. Service and Repair
- Remove cylinder head cover. Service and Repair
- Secure crankshaft for adjusting valve timing. Crankshaft, Securing





- Install camshaft locator T40070 as depicted on to camshafts and tighten bolts to 20 Nm.
- If bolts could not be installed easily, attempt to rotate exhaust camshaft at recess using an open-end wrench - A - (18 mm or 19 mm, depending on wrench width) slightly in direction of - arrow - in order to eliminate any play in chain drive.





- Relieve tension on timing chain. To do so, insert a screwdriver of appropriate size between piston of chain tensioner and tensioning track and press in direction of - arrow -.
- Secure completely pressed in piston using drift T03006. Drift must be inserted until it stops.

Secure camshafts if valve timing is not correct
- Remove chain case cover.
- Rotate crankshaft to TDC cylinder 5, however do not peg crankshaft using locking pin T40069.





- Rotate crankshaft so that camshaft locator T40070 can be installed easily on to camshafts as depicted.
- Tighten bolts of camshaft locating tool T40070 to 20 Nm.

Remove chain sprockets of camshafts.





- Relieve tension on timing chain. To do so, insert a screwdriver of appropriate size between piston of chain tensioner and tensioning track and press in direction of - arrow -.
- Secure completely pressed in piston using drift T03006. Drift must be inserted until it stops.
- Remove bolts - 1 - and - 4 - using socket insert T10035 and remove chain sprockets - 2 - and - 3 -.
- If necessary, chain sprocket - 3 - must be pressed off lightly using a screwdriver.

Note:
^ Secure crankshaft Crankshaft, securing if not yet secured. Crankshaft must only be rotated slightly around TDC point for this. Otherwise there is a risk the valves rest on the pistons.

Valve timing, adjusting
^ Crankshaft secured by locking pin T40069
^ Camshafts secured by camshaft locator T40070
^ Chain tensioner is tensioned





- Place chain sprockets - 2 - and - 3 - into timing chain, place them onto camshafts and hand tighten new bolts - 1 - and - 4 -.
- Chain gears must still be able to be rotated, however they must not tilt.

Note:
^ Make sure that timing chain lies correctly in gliding and tensioning tracks.

- Relieve tension on chain tensioner by pressing in piston and pulling out drift T03006.





- Attach modified retainer T10172 on to chain sprocket for exhaust camshaft - 4 -.

Note:
^ A second technician is required for the following work steps.

- Hold timing chain at pre-load by pressing retainer T10172 in direction of - arrow -.
- Simultaneously tighten bolt - 2 - of intake camshaft first and then bolt - 3 - of exhaust camshaft to 60 Nm.
- Then tighten bolts - 2 - and - 3 - 90° (1/4 rotation) further.

Note:
^ When applying the additional torque of 90°, timing chain must no longer be held at pre-load.





- Remove camshaft locator T40070.





- Remove locking pin T40069 for securing crankshaft.
- Turn crankshaft 2 revolutions in engine running direction and secure crankshaft.
- Check valve timing.

If valve timing is not correct:
- Loosen chain sprockets of camshafts again and adjust valve timing again (replace camshaft bolts).

The rest of installation follows reverse of removal procedures. Note the following:
^ Remove locking pin T40069 from cylinder block at rear and install screw plug.
^ Fill with coolant.