First oil change and engine developed a loud clatter/ticking noise at 1500+ rpms

[flan]

Hydraulic lifters are almost always quieter than their mechanical counterparts. The ability of the lifter to pump up to zero lash regardless of temperature accomplishes this.

That was one of the reasons they were spec’d out for the ram, to REDUCE noise, not increase. Noisy lifters have something going on. Other noises have been confused for lifter noise, a few have heard tapping thinking it was lifters but when pressure was applied to the belt tensioner the noise went away. Check there first.

 

[301cummins]

Shoot I ran mine without the belt. Still did it. I’m gonna try pushrods. Need to find torque specs for rockers first.

 

[Mackattack1516]

My 19’ with 170K started making a rather quiet ticking noise, At first it sounded like the clutch fan was hitting something. Only seems to make noise when idling (700rpm) and warm, it also comes and goes...

 

[flan]

My 19’ with 170K started making a rather quiet ticking noise, At first it sounded like the clutch fan was hitting something. Only seems to make noise when idling (700rpm) and warm, it also comes and goes...

Could be tensioner pulley.