jd 620 valve noise

[steeda50ho]

hi just replaced the valve guides on a 620 head , it runs perfect but the valves are noisy ,there is a clicking noise coming from them . i set lash and rechecked when hot but its still there anyone got any ideas
thanks jeremy

 

[RLA]

Is the rocker arm rail getting OIL ????

 

[Mike M]

Do your rocker tips have worn spots in them ? If so the clearance will be larger then you measure from the valve stems going down into the low spots.
That model has the Timken type cam bearings. Also a chance they are bad and the cam is not holding steady.

 

[BushogPapa]

Check your clearances with a Dial Indicator and you may see a difference..
The Rocker arm tips can have a wear patern that will not let you get a reliable setting with a feeler gauge..

Ron..

 

[gtx1967jewison]

I guess I've never heard a QUIET one myself. It runs with
twenty thou clearance. Nature of the beast. Too quiet means
too tight which means burned valves soon. Too loose on the
other hand has no real consequences unless very extreme.