Cylinder head stamped with Lotus Production numbers

[garyeanderson]

There is a discussion on stamped head numbers over in the plus 2 section that was current earlier in the week.
I think it belongs here in things in common.

viewtopic.php?t=15859

I have seen more heads with a number stamped in them than not, I do not see many of the later (post 1970) engines so I don't know and I can't say to much.
Here are some of the heads I have around and will try and locate some others.

[JJDraper]

Looks my belief that the engine number mark on cylinder head is added after the car left the factory is wrong... The marks and their location are very similar. I wonder when they would have been added? Post the first succesful engine bedding-in run?

Anyway, here are my engine & head numbers, which match the chassis. The car is listed as a March 1968 build.

Will this open a market in re-uniting blocks with heads??!

Jeremy

[garyeanderson]

Hi Jerimy

I don't know where in the engine process this head stamping was done. I would think that the block and head were united before they were stamped though. As far as all heads being stamped, I think that the practice was stopped at some point, the photo of my old S4 (45/8221) was from an engine in the LP 16xxx range. I have heard from some other folks that there cylinder head wasn't stamped, so who knows why or when. This is just another area where no definative statement is correct. just more Lotus as usual.

Gary

p.s. - matching numbers is a Corvette thing...