Audi Workshop Service and Repair Manuals

Removing toothed belt from camshaft sprocket Special tools and workshop equipment required t  Stud M5x55, nut and large washer

Removing –  Take off engine cover panel -arrows-. –  Remove toothed belt cover (top).

–  Pull out sealing plug at gearbox. –  Turn crankshaft at central bolt on crankshaft sprocket in direction of engine rotation to TDC mark. l  Vehicles with manual gearbox

l  Vehicles with automatic gearbox

l  At the same time the marking on the front of the camshaft sprocket must align with the marking on the cylinder head cover -arrows-. –  Rotate crankshaft one turn further if necessary.   Note Positioning crankshaft at “TDC” with engine removed → Chapter.

–  Screw stud M5x55 -item 1- into toothed belt tensioner. –  Screw nut -3- with large washer -2- onto stud. –  Carefully tension piston of tensioner until it is just possible to detach toothed belt from camshaft sprocket.   Note Take care not to compress tensioner too far. –  Remove toothed belt from camshaft sprocket.

Fitting (adjusting valve timing)   Caution When turning the camshaft, the crankshaft must not be at “TDC”. Otherwise, there is a risk of damage to valves and piston crowns. –  Check that marking on camshaft sprocket is aligned with marking on cylinder head cover -arrows-.

–  Check again whether the crankshaft is positioned at TDC -arrow-. l  Vehicles with manual gearbox

l  Vehicles with automatic gearbox

–  Fit toothed belt onto camshaft sprocket. –  Release piston of toothed belt tensioner and unscrew stud -1-. –  Turn crankshaft at central bolt on toothed belt sprocket two revolutions in direction of engine rotation and check whether camshaft and crankshaft markings align with their respective reference points.