Timing Chain Rattle! Help?

[Jparden]

I have a 1991 240sx. Timing chain doesn't make noise unless I get on it. Sounds like it's about to explode. Lol Has the right amount of oil. Bad timing chain tensioner? Sometimes it doesn't do it, but does most of the time. Anything would help.

[napz510]

possible bad lower timing tensioner and guides.