Noise lifter after eEdelbrock power package installation on my 383

[Huskie007]

My mechanic installed the edelbrock RPM heads and used rockers and pushrods from my 906 heads. There is a lot of lifter noise and he advised he left them loose? I have 50 miles on new heads, will it just quiet down over time?

Can I use the 906 rockers and push rods? Are they adjustable and if not what push rods and rockers should I push to quiet it down and not loose performance.

 

[lewtot184]

if the rockers are stock stamped steel they are not adjustable. pull a valve cover and see what you have.

 

[69roadr]

should have went with new push rods and adjustable rockers with the new heads, imo

 

[Rocketman]

My mechanic installed the edelbrock RPM heads and used rockers and pushrods from my 906 heads. There is a lot of lifter noise and he advised he left them loose? I have 50 miles on new heads, will it just quiet down over time?

Can I use the 906 rockers and push rods? Are they adjustable and if not what push rods and rockers should I push to quiet it down and not loose performance.

I did the same mod and I had to use adjustable rockers and lifters. My kit suggested 9 1/8" rods and we ordered those and adjustable rockers from Comp Cams in Memphis. I believe David McCarver was we talked to.

 

[bobtile]

Depending on the setup, you don't necessarily need adjustable rockers. What you need to do however, is use an adjustable pushrod checker and get the correct size pushrods.

 

[HT413]

Welcome, huskie. How about some pictures? Pop a valve cover off and snap a few pics with the ol' camera phone and post the cam specs while you're at it. You sure its not an exhaust leak? They sound *exactly* the same sometimes.

 

[Budnicks]

Depending on the setup, you don't necessarily need adjustable rockers. What you need to do however, is use an adjustable pushrod checker and get the correct size pushrods.

X2, depends on your specific combo, what style heads, what mods, how much has been taken off the block deck, head gasket thicknesses, rocker styles, all will change push rod lengths/style of push-rods even, you should always check to make sure you have the properly length & clearances, you will probably need longer push-rods {pretty common with the aluminum head change} if you have a bunch of slop/lash/lack of proper preload they will make a hell of a racket, too long or too short... too long you can shim the shafts up or get shorter push-rods... Google them & call Smith Brothers Push-Rods

 

[Meep-Meep]

If you have the factory stamped rockers and non adjustable pushrods then the head swap caused your lifter preload to change. Likely you will need custom length pushrods. But personally I'd get some quality adjustable rockers and 3/8" pushrods. Those Eddy heads have higher rato you will need to beef the valve train accordingly.

 

[Coronet 500]

If your using their lifters they ask for 0 lash plus 1/4 turn on the rocker arm adjuster.

Like many of the high performance lifters they are close to 0 preload making non adjustables difficult to set accurately.