Lifter noise

[Cuda Cody]

And welcome to the site @jabber353   

[73_Cuda_4_Me]

If new 'stock' rocker shafts installed, are they installed with rocker oiling holes in correct position? A previous owner of my spare 340 had installed the shafts UPSIDE DOWN... you wouldn't have much oil pressure that way though... but the holes for oil need to point toward centerline of engine (and I believe the slots on end of shafts go to the front, as I recall).

It's like your lifters aren't pumping up... did you soak them prior to install?

[RUNCHARGER]

Echo: My first inclination is the rocker shafts are installed wrong, second is pushrod length.

[Chryco Psycho]

the engine will keep oil pressure with the shafts upside down as it only oils the shaf for a split second as the cam goes around , it is not a constant feed 

[jabber353]

 Hey guys: Thx for the replies & help. I did find that the new pushrods length is shorter by ten thousandths. Gonna try old pushrods & go from there. Thx again.

[Chryco Psycho]

.010 should not make a difference if it is in range with the lifter , let us know how it turns out

[cudabob496]

was new cam put in with old valve springs?

what weight oil you using?

[jabber353]

Valvoline VR1 30 weight. I put my old push rods back in which are .010 longer hoping for the best, but valve train still noisy. Read several articles of other people having the same issue. This is the first small block mopar I've had. Always had big blocks. Never had this problem b4. It has been suggested to just ignore it & drive it...There has got to be a fix. Probably next move is going back with an all stock valve train...This is crazy.

[Cuda Cody]

I've had great luck with stock value trains.   

[Chryco Psycho]

the lifters could be the wrong application , with the oil groove at the wrong height

[Plum_crazy_T/A]

Have you pulled the valve covers or cover off to see what's going on? 30 wt might be a little light or maybe add some STP or something with ZDDP. With the covers off you can apply some pressure to the rockers. I ran roller rockers on one of my hemi's and the rockers were slightly hitting the baffles on the stock covers.

Welcome!

[Shane Kelley]

 

What brand lifters? Adjustable rockers or stock stamped? I ran Comp lifters and never could get them quiet. Switched over to the Crower cam saver lifters and solved the issue. Heavier oil will help general valve train noise but not pecking lifters.

[jabber353]

Crowed cam & lifters. I did add baffles to the valve covers but I see no sign of rocker arm contact. I'll recheck. I'm rewiring dash at this time but I'll get back to valve train noise next. Thx.

[Dakota]

Pretty much a stock 340 except for very light cam. I removed a heavier cam & wasn't making this noise. I'm gonna check the old pushrods & see if they are longer than the new ones.

Not trying to hijack the thread, just looking to learn.   What's a "heavy" vs. a "light" cam?   I haven't seen these terms before.  I've mostly heard terms around lift, duration and overlap regarding cams.

[Chryco Psycho]

Push down on the pushrod side of the rocker & see if the lifter collapse ,, they should be hard & not give at all .
Johnson is the only good mfg left for flat tappet lifters