How to Change the Audi V6 Timing Belt

Written by james marshall
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Audi AG is a German company that makes cars in a range of styles. A V6 engine is common in late-model Audi cars, such as the A6. This executive car typically features the AHA series engine, a six-cylinder, 2.8-litre engine with a double overhead camshaft. This engine has a timing belt to synchronise the movements of the crankshaft and camshafts. The timing belt requires regular replacement, unlike a timing chain, which can last the lifetime of the car.

Skill level:
Challenging

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Things you need

  • Socket wrench set
  • Tool No. 3242
  • 8mm Allen wrench
  • 2mm spring pin
  • Torque wrench

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Instructions

  1. 1

    Disconnect the negative battery cable with a socket wrench. Detach the accessory drive belt from its pulleys. Turn the crankshaft clockwise by hand to align the timing mark on the crankshaft pulley with the timing mark on the crankcase. The timing marks on the camshaft must also align with their respective timing marks on the crankcase.

  2. 2

    Remove the plug from the left side of the engine block by the crankshaft with a socket wrench. Align the timing marks on the crankshaft again if necessary. Connect Tool No. 3242 to the crankshaft and tighten it slightly to hold it in place.

  3. 3

    Disconnect the upper timing belt covers, crankshaft vibration damper and lower timing belt cover in that order. Loosen the mounting bolts for the camshaft sprockets with a socket wrench, and release the sprockets from the ends of the camshafts.

  4. 4

    Turn the roller for the timing belt tensioner clockwise with an 8mm Allen wrench to compress the tensioner. Place a 2mm spring pin through the holes in the tensioner housing and plunger to hold the plunger in place. Turn the tensioner counterclockwise to release the tensioner.

  5. 5

    Remove the mounting bolts for the crankshaft damper with a socket wrench and detach the damper from the crankshaft. Disconnect the serpentine belt from the idler pulley and remove the guard for the crankshaft damper. Detach the timing belt from its pulleys.

  6. 6

    Align the timing marks for the camshaft and crankshaft pulleys, if necessary. Place the new timing belt onto the pulleys, so that the arrow on the timing belt points in the clockwise direction.

  7. 7

    Turn the roller for the timing belt tensioner clockwise with an 8mm Allen wrench to compress the tensioner. Pull the 2mm spring pin from the housing of the tensioner plunger. Turn the tensioner roller counterclockwise to apply tension to the timing belt.

  8. 8

    Connect the damper guard for the crankshaft and attach the serpentine belt to the idler pulley. Tighten the mounting bolts for the idler pulley bolts to 33 foot-pounds with a torque wrench. Replace the crankshaft damper and tighten its mounting bolts to 15 foot-pounds. Fasten the mounting bolts for the camshaft sprockets with a socket wrench. Install the timing belt covers.

  9. 9

    Remove Tool No. 3242 from the crankshaft pulley. Install the sealing plug into its hole on the lower left side of the engine with a socket wrench. Attach the accessory drive belt and connect the cable for the negative battery terminal.

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