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Rockers off

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gab440

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A6223947-EA9D-42EE-B586-9E91D3803CB5.jpeg
hi ihave a 383 my rockers are not aligned with the valve springs what would cause this
 
Do you have the left hand and right hand rockers in the right spots?
 
The rocker arms have a slight offset. They could be installed on the rocker shaft out of order, or even mixed up?
Hard to tell from the photo, but it looks like they are out of order / not paired correctly.
In the photo, the far right pair look swaped intake and exhaust. The bumps for the pushrods should be offset towards each other
 
There is a right and a left rocker for each cylinder.
 
Other than the far right pair (that are swapped) you appear to be missing the spacer rings as well...

..what they should look like...
beerestoration2015-2016 1128.JPG

beerestoration2017 058.JPG
 
Last edited:
Here is a picture of what they are supposed to look like left & right.
Looks like you have a few backwards.
I found a 383 HP motor and they had half of them switched.

IMG_2697.JPG
 
Question is what do they consider "left" and "right" as if that is a "pair" assembly would be wrong, if you put them where they call them...
 
The drawing is incorrect.
It depicts the offset for the valve end of the rocker to be on the same side of the rocker as the pushrod offset...... which is clearly not how the actual rockers are.
The valve end offset is on the opposite side as the pushrod socket offset.

They install on the shafts so that the pushrod sockets are towards each other, and the valve end offsets are away from each other.

2B5AEDE2-9C7E-4626-8C7E-AF0370C5C7EF.png C1EB7B4B-67B7-4A2E-8855-3C6B7FDED272.jpeg
 
PRHeads said:
The drawing is incorrect.
It depicts the offset for the valve end of the rocker to be on the same side of the rocker as the pushrod offset...... which is clearly not how the actual rockers are.
The valve end offset is on the opposite side as the pushrod socket offset.

They install on the shafts so that the pushrod sockets are towards each other, and the valve end offsets are away from each other.

View attachment 1124401 View attachment 1124402
Click to expand...
Well I'll be, the book is wrong! I got this from the HP Books "How to rebuild Big Block Mopar Engines" so that is a pretty big mistake for sure.
Here is a picture from my 69 Service manual that shows the setup and some rockers - left & right.

IMG_2706.JPG IMG_2707.JPG
 
It looks like they are all bass ackwsrds and missing spacers.

For better input you could take a picture square on and folks here will let you know in a hurry what’s up.
 
Thanks everyone for your response
I will check everything that was mentioned.
The weird thing is I didn’t touch the rockers i was just going to change my valve cover gaskets
 
I think you need to pull the rocker shaft off entirely and take a look at each one.
They might have some wear marks if they are run any length of time like that.
Inspect the valve tips as well...
Hopefully you can just fix the arrangement and everything will be cool
 
I would make sure the rocker shafts are installed correctly to with the oiling holes down slightly facing the valve springs.
 
I would be very concerned about wear in the rocker pushrod socket
This is a known weakness for the factory rockers
High lift cams change the angle of wear inside the cup and produce a weakness that eventually cracks the socket
Placing those rockers in the wrong order has produced a new angle of wear inside the socket no different from changing to a high lift cam
Inspect them closely and dont hesitate to replace them
IMG_20190217_104304969.jpg

(for those that notice, this picture was taken many years after the failure and the rocker sat under a work bench for years. That's why it appears so rough)
 
TN Mopar said:
I would be very concerned about wear in the rocker pushrod socket
This is a known weakness for the factory rockers
High lift cams change the angle of wear inside the cup and produce a weakness that eventually cracks the socket
Placing those rockers in the wrong order has produced a new angle of wear inside the socket no different from changing to a high lift cam
Inspect them closely and dont hesitate to replace them
View attachment 1124465
(for those that notice, this picture was taken many years after the failure and the rocker sat under a work bench for years. That's why it appears so rough)
Click to expand...
I keep stuff like that as a reminder. Did a valve job on a 318 put one shaft upside down and that happened.
 
I had same issue with Rockers not aligning. I removed the assembly which by the way was supposedly never touched. (2nd owner) I found that one set had 2 lefts next to each other. You would assume you would also find a right set as well. Had to order a right to assemble correctly.
 
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