Audi A4 1.8t compression

My timing belt had stripped out so I bought a
new one replaced that and the water pump
the guy that I have working on it says that the
valves are not bent and everything looks
smooth but says I still have no compassion in
any of the cylinders. do I need to have the
car out of service mode  together before I
have compression? In other words what
having the intake front of the motor still a part
would that affect the motor  not having any
compassion? Also just to add it wasn’t a
violet mishap the car was at an idol and just
stalled no Violent or loud about noises so I
do believe the motor is still good.  In the tiny
marks are on with the new timing belt triple
checked Please help  thank you for your time
and knowledge