I have a 2005 Magnum 300 4X4 and it has a terrible clicking noise from the engine. I bought it used about a year ago and it sounded and ran fine when I bought it. Not too long ago I noticed a knocking noise coming from the engine so I changed the oil and it still happens. It gets louder as it warms up. I then adjusted the valves hoping to solve the problem but had no success of clearing the noise. I have read a few posts saying that the 330 engine makes a lot of noise and this is natural but it just worries me the sound it makes. If anyone can tell me something to check for it would be great. Thanks.

 

cam chain maybe?