Timing belt snaped while driving on my 1994 Audi 90 CS i had a friend replace it but did not run right and died the belt seemed loose so i took it to a repair shop and they told me the valves may have been damaged is this correct and if it is how difficult would it be to put a new valve kit on it.

you probably have a bad bearing on one of the pulleys.
check them all. something is freezing up running really
hard and snapping the belt. How's the a/c clutch too.

go to any auto parts store and buy a haynes manual. for about 25.00, the timing specs, will be in there. they are based on a complete teardown of your vehicle. just tell them you need one for your make, year and model of your car. it also has lots of diagrams for your car. . good-day !

sounds like the camshaft, or crankshaft position sensor is unplugged.

Water pump sits in the front of the engine top centerline. Look just below the coil pack. It uses the timing v-belt for operation so it takes a bit of mechanical know how to remove/replace (r&r) it, as the timing can be thrown off if the v-belt is not reinstalled correctly. Get past the timing belt, the water pump is r&r is just a few bolts away. I'm currently babying my water pump...the part is relatively inexpensive compared with an almost $500 labor charge (5hrs, dealer est.) to replace it. I'll be hitting up the dealer as my '93 Audi 90 CS Quattro is a daily driver. G/L

I am not sure if you have the 90 or the 90 Quattro.
Click on the below Links.
The first Link is all the Diagrams on the Timing Belt for the 90 Model.
The second link is all the Diagrams on the Timing Belt for the V8 Quattro.
Before clicking, let me know if this helped you.
For the 90 Model:
http://www.2carpros.com/car_repair_information/year/1993/make/audi/model/90/1993_audi_90_timing_belt_diagram_marks.htm

For the V8 Quattro:
http://www.2carpros.com/car_repair_information/year/1993/make/audi/model/v8_quattro/1993_audi_v8_quattro_timing_belt_diagram_marks.htm

On the low side charge outlet, right on the compressor itself

sounds like Engine computer.....

doin a head gasket replacement is not really easy specially if the engine stil in the car . . u have to take the right procedures unless u trying to do a cheap fix, u need to check for warpage for cylinder head and block deck so when it comes to head gasket work u really need to do things carefully and take it step by step.

starters seem difficult, but can be accomplish relatively quickly. there friendly because you don't have to worry about belts and gaskets. My assumption here is that you know you need to replace the starter and you know where the starter is located.
first disconnect negative battery cable.
On the starter you will need to disconnect power and ground. then you can pull the bolts and remove the bad starter. Installation is reverse of course. Once installed and secure, always double check the gound connection. reconnect battery and off ya go. Time should 45ish minutes.

Have you tried replacing the starter? I know starters can go bad if the car is not started or run for a long time.

I am getting the same car, with the same issue.. it sat for 2 yrs and won't start.

My mechanic told me it is probably a starter.