Chatter from front of engine

[Phillyry]

305TBI.Chatter comming from front of crank by Harmonic Balancer. Only after its warmed up, always around idle or under 1300, at a stop in drive it sometimes sounds very nasty but pop it in N and it quiets down alot. Took off the belt and it's deff not any other accessory. In park it could be very quiet then all of a sudden it starts a loud chatter, I give it a little gas and it goes away, let off gas as it falls back down to idle chhxchchx.... ?????

[JSPERFORMANCE]

could be the timing chain flapping around inside and hitting the cover...

[Phillyry]

good thought, but why only after it has warmed all the way up?

[JSPERFORMANCE]

the metal expands when it is warm, also oil gets thicker when it is cold. those two combined with a warn out chain could make the noise..

[Phillyry]

JS, would you suggest replacing the sprockets even if the teeth look good and they dont look bent?

[Bow94z]

JS, would you suggest replacing the sprockets even if the teeth look good and they dont look bent?

I would

[JSPERFORMANCE]

replace the whole timing set with a double roller set from comp or another good hp set.