mehorto

On the vibration damper there is obviously a timing mark which I'm assuming lines up with the arrow on the block. The only reference bently has to this mark is when locking the crank. However, when putting the damper back on, the dot does not line up exactly with the arrow. when i twist the pulley the threads put the dot a little above or a little below. is this normal, any suggestions? Thanks PS. The crank is already locked at tdc

4Driver4

I'd pull that off and see if the key is partially sheared.

chefbob

all these questions are about a 20valve, correct?

audifreakjim

Don't use it, stick to the FW and cam marks for setting timing.

4Driver4

I assumed it was a 12v.

520

2nd...rubber insulator wears off and pulley's outer 'ring' slips and throws off your markings.

chefbob

clarification would help

VAP

<center><img src="http://pictureposter.audiworld.com/711/lwhd7.jpg"></center><p>
and the only "pressed-in" piece is the heavy inertial weight that is isolated by a thick, dense rubber sandwich. If the inertial damping ring slips or spins the timing mark cant move as long as the flange doesnt slip on the crank.

In this pic you can see everything is one-piece except the heavy inertial ring which I've CNC'd for weight savings. The timing mark is in the one-piece assembly that bolts to the crank. No matter how much the inertial ring moves the timing mark remains in EXACTLY the same spot.

VAP

all the components related to indexing are made in several cities across Europe and others on different continents. You have flywheel pins, cast and injection-molded aluminum and plastic markings and slotted crank counter-weights. Then there's dampers and their markings.

And to top it all off even Audi doesnt use those marks on engine assembly. There's only one way to do it "very very" right and thats with a degree wheel and a dial run-out indicator. The same way Audi and every other engine manufacturer and assembly plant on the planet does it. No engine assembly plant on earth would dare use those marks assembling an engine!

Sure the provided marks will get you close... the car "will" run. But ya never know where you really are as it relates to timing.

All this is doubly important on Audi V-engines in the line up with tapered rather than keyed cams that most people dont even realize have adjustable cam timing built-in with no aftermarket parts to buy.