AEG163 Cylinder Head

[DonRacine]

Were the pressed rockers ever used on the AEG163 head or only the cast ones?

[iain1967s]

As far as I know, pressed steel rockers were never used on any Mk1 or Mk2 S heads.

All 11-hole Mk1/Mk2 S heads used forged rockers with 1/2 inch lash adjuster nuts.

The timeline is roughly:

AEA691 forged rockers on the 185 [early Mk1] and 163 heads [later Mk1, early Mk2]
AEG426 forged rockers on the raised top 940 S heads [later Mk2, early Mk3]
12G1221 forged rockers on the final flat top 940 S heads [later Mk3]

Pressed steel rockers came in later in the Mk3 S production run [see below].
Cast [sintered] rockers were introduced way later, for A+ 940 heads.

[LarryLebel]

Hey Don, I have 4 cast rockers if you need some. How does $20 each sound?

[Ronnie]

Way after the 163, but my Mk3 (12G 940) used pressed steel rockers, purchased new 1971.

[iain1967s]

Just checked and Parnell says the same for Mk3.
”During the production run, the original forged valve rockers were changed to the pressed steel type.”
Have edited my original post. Learn something new here every day

[Ronnie]

There were two types of forged rocker on the S early with like an anvil head, and the later lighter (I believe) with a platform head. I have no idea of change points.

[DonRacine]

Hey Don, I have 4 cast rockers if you need some. How does $20 each sound?

Dug around in my stash and it turns out I found a set- thanks anyway