I recently replaced the timing gear in the car and about 3 weeks after I did the work I started getting a rattling sound from the timing chain side of the motor. I took the valve pan cover off and everything looked normal. I then took the oil pan off and removed the oil pump cover and noticed the the oil pump chain appeared to have a lot of slack. I took a video of it and was looking for opinions on it. Here is the Youtube link to it. Thanks !

 

the oil pump doesnt exert tension on the crankshaft. this is normal play for the chain and the cover actually puts some tension on it.

did you do the whole timing chain kit or what was it? the original chain might be stretched!