It's hard to know for sure, but either the cam is pushing the valves open too far, the pistons are sticking out too far, or the cam timing is off.
your timing can not be right
The pistons may be hitting the valves.
Timing chain may have broke or jumped and the pistons are hitting open valves.
ANSWER YES, The valves will hit the top of pistons and either the valves will bend or the pistons will be destroyed.......
Single overhead cam have interference with pistons & valves. While in duel overhead cam engines there is interference betwen the pistons & valves & also between the intake & exhaust valves.
Most flat top pistons have notches cut in them to clear the valves. You could cut the notches deep enough to suit your cam or get a cam with less lift.
Need more info. It can be $5 for a Tire valves to $2000 from bent valves/damaged pistons.
YES THE VALVES WILL HIT THE PISTONS IF TIMING BELT JUMPS OR BRAKES YES THE VALVES WILL HIT THE PISTONS IF TIMING BELT JUMPS OR BRAKES
pistons, cams, valves
The timing belt is what keeps the valves from moving in synch with the pistons. If the timing belt snaps or cogs over the pistons are likely to collide with the valves smashing them both.
The timing marks on a 1987 2.2L Dodge Dakota are located on the timing chain and the cam sprocket. They must be perfectly aligned to prevent the pistons and valves from hitting each other.
same direction and forward.