timming chain noise

[jenmes70]

i have a 1996 grand bought it needing a water pump replaced that. it ran with a tic so 15000 miles and still has a tic more so when cold after reading on this and my uncle stan i think it may be the timming chan. it doesnt make any noise under load or if you give it some gas runs like a top. i drive it 40 miles a day every day m-t . i just want to know if any one has a thouht on this?????????

[604rail_king]

Pull the timing cover and inspect things is a start of you don't have any other areas/parts to suspect.

[SilverXJ]

Is it more of a dull rhythmic tap or a sharp rhythmic sound?

[jenmes70]

its dull i think . its not sharp .its only at idle less so when warm .its been 15000 miles same noise not worse not better just the same. thanks for all of your input. i was going to pull the motor strok it but i thought the motor would blow up. but it wont. i do have a 1998 4.0 109000miles and a runing 1981 j10 4.2 just dont want to pull a good motor if i dont have to. the other to motors are something i want to do just need $$$$$ to get it done want to do the poor mans stroker sorry about the book.

[SilverXJ]

Sounds like piston slap possibly, which these engines are known for. Probably run another 100,000 miles like that. Also, check your flex plate bolts. That sound is usually sharper though.