Audi Repair: 01 A4 1.8t no compression, timing belt intact, belt tension, valve job

Question
QUESTION: Hi Jan, I have a 2001 Audi A4 1.8t, quit after a long drive, checked the timing belt- intact, no compression.
any suggestions?
thank you for your time
Ron

ANSWER: Timing belt may be intact, but is the cam timing right?  I would check the reference marks first.  If the engine turns over, and the valves are still operating correctly, you have to see compression unless someone has stolen your pistoms and connecting rods...  Let me know,  Jan

---------- FOLLOW-UP ----------

QUESTION: Thank you Jan, while I was checking the compression I think the valves went into the pistons as the motor stopped turning and I can only turn it about a half inch with a wrench.  I'm going to check to see that the keyway is still intact on the camshaft sprocket.  If it is not intact and the camshaft had seized from lack of oil pressure, do you think this motor is salvageable?  Do I need to take the top end off to check the valves, or is it worth repairing the camshaft from under the valve cover without worrying about bent valves?  I know it is difficult to answer these questions without being here, thank you for your time and knowledge!

Answer
Well I just went through this exercise with my son's car.  Since replacing the head and doing a valve job is a major undertaking, I always verify that it is necessary.  So I would make sure that everything turns, and get the timing marks lined up.  If the crankshaft stops, don't force it, turn it back a little, then turn the cam and align it to the correct position, and see if you can then turn the crank to TDC.  This may take a few iterations since there are always valves open no matter where you position the cam.  Once aligned, set the belt tension and re-do your compression test.  Unfortunately the chance that you have bent some valves is quite high...  This cannot be fixed without taking the head off.  We re-did the head on my son's 20V CQ for around $300 including gaskets, belts etc. since he only needed 2 valves, and I wanted him to learn how to lap valves in.  Alternatively complete cylinder heads can be obtained used for around $250, will save you a lot of time.  Good luck,  Jan