MC1 timing help

[Huw Powell]

> Huw,
>
> Do you know anyone in the area with the know-how and
> tools to allign my head and timing belt without the
> flywheel attached?

What area?

>  I am done building up my new
> motor, but now I need to allign everything, install
> the timing belt and tourque the crank bolt.  The
> engine is still on the stand (hence no flywheel.  I
> have never done this before and am hesitant to make a
> very expensive mistake?  Any thoughts?

The crank is at TDC when the #1 piston is at it highest in the bore.
This is easy to determine pretty accurately by pulling the plug and
letting a small dowel or screwdriver ride on the piston face while you
turn the engine by hand.  When this coincides with the #1 valves being
closed (both cam lobes "up") it is TDC in terms of crank *and* cam
timing, since the piston is on top twice in one camshaft revolution.

To test your relative success, install the timing belt and then rotate
the engine through a full 720 degrees, gently, to check for piston/valve
contact.

After you shift the engine to a hoist, pre-installation, you can install
the flywheel and check once more that you got all your TDC points in sync.

--
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/