twincam cam cap numbering???

[elanbaby]

Hi,
just took off my cams for valve adjustment. Noted the location of the cam caps meticulously. For inlet cam number 1 to 5 from back to front (of car) and for exhaust cam number 6 to 10 from front to rear (of car).

In Miles Wilkins Twin Cam Engine book is a picture (page 88 top), where one can see the sequence of the exhaust cam caps. It?s the same as on my engine.

In my Original Lotus Workshop manual (section E pg 14 top ) the numbering sequence for the exhaust cam caps ist the other way, i.e. number 6 starts at the back an number 10 ends at the front near to the timing housing.

As I know it?s very important to assemble it the same way it has been line bored once I?m a bit confused. Which is correct? Or did the numbering sequence change at some point?

Any ideas or experience with this topic?

Juergen

[ppnelan]

The numbers should be stamped on the caps and on the top (cambox) face of the head, typically on the inner edge (near the spark plugs).

Matthew

[frearther]

Juergen,

My cam bearing caps are also different fron the diagram in the shop manual. But I match the number stamped on the bearing cap with the number stamped on the head, and I disregard the manual in this case. It seems that even the factory had a tendency to ignore the manual when it was expedient.

[elanbaby]

Today I scraped off the remains of the cam cover gasket and discovered the corresponding cam cap numbers stamped into the head.

Exhaust cam numbering just as the numbers on the caps I removed. And the other way round than in workshop manual.

OK, I?ll stick to the number sequence on my head of course.

Thanks a lot for your quick answers and help!

Juergen