2002 Dodge Intrepid timing chain

I installed a new timing chain according to a chiltons manual. seems to have went alright until rotating the crankshaft. while rotating, the chain gets slack at each side of the water pump meaning as the chain passes over the passenger side camshaft down to the water pump then from the water pump up to driver side camshaft. i did notice that when it happens the passenger side exhaust valve is being opened

last 2 pictures are to show the slack at the water pump,