Hello,

i disassembled my L28 cylinder head yesterday and I was wondering why my rocker arms are not all marked the same.
Are these original Nissan rocker arms or were they already replaced by a previous owner?
Thank you for your help.

JagoBlitz

I think that those are just mold/casting numbers.  Same part design, same factory, just different forming stations.  They're all collected together then sent off to another manufacturing station for the pad attachment and final machining.

Some old dusty books I found in my library...

I can't find the different numbers but they're the same. Seems like I have some S numbers and some E numbers?

Send them to Delta for resurfacing for sure. Great job at a good price.

  On 5/7/2022 at 6:39 PM, JagoBlitz said:

 

 

Another 280Z owner told me that his rocker arms and all rocker arms he ordered from Nissan had this parallelogram on them.

Here's an old post from another forum (it's me).

https://forums.hybridz.org/topic/119576-rocker-arms-state-of-the-situation/