Note: If the engine is in the car, please do the following first:
- (a) Disconnect the negative battery cable
- (b) Where used, remove the power steering pump leaving the hoses connected (Section 10)
- (c) Remove the alternator drive belt (Section 12) and, if equipped, the air conditioning compressor drive belt (Section 11)
- (d) Remove the grille
1. Use Audi tool 2084 to block the vibration damper at the front end of the crankshaft, then use Audi tool 2079 to loosen the center bolt. However, the bolt can be loosened by blocking the starter ring gear with a wide screwdriver or the method shown (photo).
2. Follow steps 1-11 inclusive of Chapter 35 (where equipped, remove both drive covers).
3. Unscrew the central bolt, remove the vibration damper together with the crankshaft sprocket and timing belt.
4. Separate the vibration damper from the crankshaft sprocket by unscrewing the bolts, then screwing in two diagonally opposite bolts a few turns until they come out through the vibration damper.
5. Do not turn the crankshaft with the timing belt removed.
6. If necessary, unscrew and remove the rear timing belt cover.
7. Installation begin with an arrangement of a back covering of a gear belt of a drive on the forward end of a head of the block of cylinders and the block, then clamp a fixing bolt and racks.
8. Install the vibration damper on the crankshaft sprocket, then tighten the bolts.
9. Align the key on the crankshaft sprocket with the groove in the crankshaft, then position the timing belt on the crankshaft sprocket, install the sprocket on the crankshaft (photo). Make sure the belt is not pinched between the sprocket and the oil pump housing.
10. Coat threads of center bolt with blocking fluid (photo), insert and tighten the bolt, blocking the crankshaft.
Note that the tightening torque given for this bolt is only applicable when using the Audi 2079 tool: if you are not using this tool, tighten the bolt to at least the specified tightening torque and then have your Audi dealer check the final tightening torque (a special tool increases the leverage of a standard torque wrench).
11. Install the key and sprocket on the camshaft. Insert the bolt and washer, tighten the bolt with the tightening torque specified in the Specification.
12. Check that the alignment marks are correctly positioned as described in Chapter 35, paragraphs 4-7.
13. Position the timing belt on the crankshaft, camshaft and water pump sprockets and on the intermediate gear. Turn the water pump counterclockwise to pre-tension the belt, then check that the TDC alignment marks remain aligned.
14. Turn the water pump counter-clockwise and tension the drive timing belt so that it can only be twisted up to 90°by placing your thumb and forefinger midway between the camshaft and water pump sprockets (photo). Tighten the water pump mounting and adjustment bolts.
15. Turn the crankshaft two full turns, then recheck the installation and adjustment of the timing belt.
16. Install the drive belt covers.
17. Install the valve cover with new gaskets.
18. If the engine is in the car, restore the performed preliminary procedures at the beginning of this Chapter.
Visitor comments