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Home >> Audi >> 2003 >> Allroad Quattro (4BH) V8-4.2L (BAS) >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Timing Components >> Timing Chain >> Service and Repair >> Timing Chains, Removing From Camshaft >> Installing

Installing


Installing
^ Crankshaft in TDC position fixed with 3242.

Note:
^ Replace self-locking nuts and bolts when performing assembly work.
^ Replace bolts tightened by turning through a specified angle as well as oil seals and gaskets.
^ When turning camshaft, none of the crankshaft cylinders should be at TDC, as this could result in valve/piston crown damage.





- Turn inner and outer sections of both camshaft adjusters in opposite directions as far as detent position (arrows).
^ In detent position, it must not be possible to turn inner and outer sections in opposite directions (slight play can still be felt)

- Check whether camshafts of both cylinder heads are at TDC.





^ Slots (arrows) at front of camshafts must be parallel to and level with top edge of cylinder head





- Insert camshaft locator T40046 in camshafts of left cylinder head (if necessary, turn camshafts slightly in one direction or the other at hex).





- Insert camshaft locator T40046 in camshafts of right cylinder head (if necessary, turn camshafts slightly in one direction or the other at hex).
- Replace all four camshaft bolts.





- Install left timing chain with chain sprocket and camshaft adjuster.
- Loosely screw in bolts -1- and -2-.
^ It must still be possible to turn chain sprocket and camshaft adjuster on camshaft without tilting them.





- Install right timing chain with chain sprocket and camshaft adjuster. - Loosely screw in bolts -1- and -2-.
^ It must still be possible to turn chain sprocket and camshaft adjuster on camshaft without them tilting





- Remove locating bolt 3242.





- Give crankshaft 30° turn in direction opposite to that of engine rotation (arrow).
- Pull drill bit out of setting hole, thus releasing left chain tensioner.





- Insert plastic wedge 3409 as shown and move chain tensioner until it makes contact with plastic wedge 3409.
^ Approximately 0.5 mm extra is permissible
- Pull drill bit out of setting hole, thus releasing right chain tensioner.





- Insert plastic wedge 3409 as shown and move chain tensioner until it makes contact with plastic wedge 3409.
^ Approximately 0.5 mm extra is permissible





- Turn crankshaft in direction of engine rotation (arrow) to no. 8 cyl. TDC ignition point.

Note: In the event of inadvertent turning beyond TDC, turn crankshaft back again by 30° and approach TDC again.





- Screw locating bolt 3242 into hole (20 Nm); if necessary, turn crankshaft back and forth slightly to fully center bolt.





- Pre-tighten camshaft bolt -1- at exhaust camshaft of left cylinder head.
^ Tightening torque: 40 Nm





- Fix Hall sender rotor ring in position at adjuster of inlet camshaft of left cylinder head with locator T40047.
- Position locator at bolt -1 -.
- Pre-tighten camshaft bolt -2- at inlet camshaft.
^ Tightening torque: 40 Nm





- Fix Hall sender rotor ring in position at adjuster of inlet camshaft of right cylinder head with locator T40047.

- Position locator at bolt -2-.
- Pre-tighten camshaft bolt -1- at inlet camshaft.
^ Tightening torque: 40 Nm
- Detach locator.





- Pre-tighten camshaft bolt -2- at exhaust camshaft of right cylinder head.
^ Tightening torque: 40 Nm

Note: Camshaft locators are not to be used to provide support when finish tightening camshaft bolts.





- Remove camshaft locators T40046 at both cylinder heads.





- Finish-tighten camshaft bolt -1- at exhaust camshaft of left cylinder head.
^ Tightening torque: 100 Nm plus another 90° (1/4) turn





- Fix Hall sender rotor ring in position at adjuster of inlet camshaft of left cylinder head with locator T40047.
- Position locator at bolt -1 -.
- Finish-tighten camshaft bolt -2- at inlet camshaft.
^ Tightening torque: 100 Nm plus another 90° (1/4) turn





- Fix Hall sender rotor ring in position at adjuster of inlet camshaft of right cylinder head with locator T40047.
- Position locator at bolt -2-.
- Finish-tighten camshaft bolt -1- at inlet camshaft.
^ Tightening torque: 100 Nm plus another 90° (1/4) turn
- Detach locator.





- Finish-tighten camshaft bolt -2- at exhaust camshaft of right cylinder head.
^ Tightening torque: 100 Nm plus another 90° (1/4) turn





- Remove locating bolt 3242.





- Give crankshaft two turns in direction of engine rotation (arrow) until crankshaft is set to TDC again ...





- ... slots (arrows) at front of camshafts must be parallel to and level with top edge of cylinder head.





- Screw locating bolt 3242 into hole (20 Nm); if necessary, turn crankshaft back and forth slightly to fully center bolt.





- Insert camshaft locator T40046 in camshafts of left cylinder head.





- Insert camshaft locator T40046 in camshafts of right cylinder head.
^ Repeat adjustment if camshaft locators cannot be inserted
- Pull out plastic wedges 3409.
- Remove camshaft locators at both cylinder heads.
- Remove locating bolt 3242.
- Screw TDC mark screw plug with new oil seal into upper part of oil pan.

Perform further installation in reverse order, note the following:
- Install covers for timing chains.
- Install left and right front exhaust pipe.
- Install engine.





Tightening torques
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