Top dead center

[euro_urs4]

Hey guys just would like to know how to adjust or know that the head is at top dead center for the aan motor and same for the both. End so I dot screw it up when I put t back on thanks

[merlin's S4]

The marks on the two cam sprockets should be facing each other.

[Sleeper_Avant]

as above,
and in line with the top of the head!

also hope this helps

http://www.sjmautotechnik.com/trouble_shooting/S4timing.htm

[euro_urs4]

Thanks will check it out later appreciate it

[UrS4boy]

Hey guys just would like to know how to adjust or know that the head is at top dead center for the aan motor and same for the both. End so I dot screw it up when I put t back on thanks

I answered your (same) question on AudiWorld but here it is again:

There is a mark on the cam pulley that aligns with the a "V" notch in the cam cover. These need to line up. At the same time, the cams need to be oriented such that their "O" markings line up at the top of the head and pointed at each other. (e.g.looking from the front, the exhaust cam (left side of the head from the front) is at 3 o'clock (on the head) and the intake cam (right side of the head from the front) is a 9 o'clock. At the same time, there is a mark on the edge of the harmonic balancer at the front of the crank that lines up with a mark on the lower timing belt (metal cover).

Ref: pgs. 15-20 and 15-22 of this AAN manual:

http://s2-audi.co.uk/workshop/aan/aan.pdf

and Photos 4 and 5 from Fred Munro's serp belt DIY:

http://s-cars.org/postnuke/downloads...Belt%20R&R.pdf

Plus, Eric you have a private mail (at this S2 forum).