Installing (Adjusting Valve Timing)

WARNING: This page is about a different variant/trim than selected.

Fig 1: Checking Valve Timing

Courtesy of AUDI OF AMERICA, LLC

For the correct tightening specifications, refer to TOOTHED BELT DRIVE OVERVIEW .

CAUTION:

Risk of damaging valves and piston crowns.

If camshafts are being rotated, crankshaft may not rest with any piston at "TDC".
The engine must be no more than warm to touch.

-- Make sure the camshaft and crankshaft are at "TDC" :

The markings on the camshaft -top arrow- and crankshaft -bottom arrow- must align.

-- When reinstalling the toothed belt, note running direction marking:

Crankshaft, tensioning roller, camshaft, coolant pump and idler roller -arrow-.

Fig 2: Identifying Routing Of Toothed Belt
Courtesy of AUDI OF AMERICA, LLC

-- Make sure the tensioning roller fits correctly inside the cylinder head.

The bracket -arrow- must engage into the cut-out in the cylinder head.

Fig 3: Identifying Tensioning Roller Is Properly Seated In Cylinder Head
Courtesy of AUDI OF AMERICA, LLC

-- Tension the toothed belt as follows:

-- Rotate the eccentric pulley clockwise using a socket wrench -arrow- until the notch -2- is above the tab -3- (toothed belt over-tensioned).

Fig 4: Rotating Eccentric Pulley Clockwise Using A Socket Wrench

Courtesy of AUDI OF AMERICA, LLC

-- Release the eccentric pulley back to its starting position (toothed belt relaxed).

-- Rotate the eccentric pulley clockwise using a socket wrench -arrow- until the notch -2- is opposite the tab -3-.

-- Tighten the tensioning roller nut -1-.

CAUTION:

Components could be destroyed by the toothed belt jump off.

-- Turn the crankshaft by the toothed belt pulley bolt 2 turns in the direction of engine rotation until the crankshaft is once again at "TDC".

-- Check the toothed belt tension:

-- Re-tension the toothed belt if necessary.

-- Valve Timing, Checking:

The markings on the camshaft -top arrow- and crankshaft -bottom arrow- must align.

Fig 5: Checking Valve Timing
Courtesy of AUDI OF AMERICA, LLC

-- If the markings do not align, repeat setting the valve timing.

The rest of the installation is performed in reverse order of removal, noting the following:

-- Install the lower toothed belt guard. Refer to TOOTHED BELT DRIVE OVERVIEW .

-- Install vibration damper. Refer to VIBRATION DAMPER .

-- Check the valve timing one more time:

Fig 6: Bringing Camshaft Gear To Marking For TDC Cylinder 1

Courtesy of AUDI OF AMERICA, LLC

The marking on the camshaft sprocket must align with the arrow on the toothed belt guard -top arrow-.
The notch on the vibration damper must align with the arrow on the toothed belt guard -bottom arrow-.

-- Install the engine support and the engine mount. Refer to ENGINE AND TRANSMISSION MOUNTS OVERVIEW and adjust SUBFRAME MOUNT, ADJUSTING .

-- Install the front right coolant pipe. Refer to RIGHT FRONT COOLANT PIPE .

-- Install the ribbed belt tensioner. Refer to RIBBED BELT TENSIONER .