hey all, I was doing a cylinder leakdown test today at work, then i had to play with the ignition switch and forgot i still had the cylinder leakdown tester installed on the #4 cylinder. I cranked the engine for a few rolls until i realized i still had the tester installed with air still going to it. Do you think I would of bent anything?

 

well cylinder leakdown- rocker arm assembly was off right? that means all the valves were closed. i'm gonna have to say you have damaged nothing. pretty confident.

 

rocker assembly was on, i was more concerned about rods though

 

No. You just pushed the air back into the compressor. Still, you could never reach combustion pressures if you had 100psi in the cylinder and cranked it over.