So just how much slack is the timing chain suppose to have?

I'm replacing my fuel pump, and while inspecting the hole in the timing cover, I noticed I could see the timing chain. I couldn't resist poking my finger in there and pushing on it. when I did, I found it moved alot. atleast an inch and a half, or as far as my finger would go. it also feels like it can swing back and forth freely.

So how much slack is normal? is there a device to keep tension on the chain?

 

thats a bit loose, I have learned here that the way to check a timing chain is to turn the crank with wrench untill the cam starts to move , then turn it the other way until the cam starts to move , or if you cant see it watch the distributer rotor . the amount of turning prior to the cam or distributor moving will give you the amount of streach. there can be quit a bit and your engine will still run. bob

 

A new OEM chain costs about $28, a new true roller chain is about $50. I would replace it just to have peace of mind. Do you have the steel camshaft gear, or nylon cam gear? Here in the cold climate I see those nylon gears break every winter. So my vote would be to replace your chain/gears. Replace the front crankshaft seal also since it is removed with the timing chain cover.