Sounds like you are running the piston into a valve. Check the timing chain to see if it's jumped a few teeth. If you forced it to hard while turning the crank over you might have bent a valve.
                                                                                              CT 
                                                                                            
                                                                                                                 

Last Edited By: The CT Shop Jun 15 10 4:31 PM. Edited 1 times.