Forum has been quiet for sometime ...

I was curious if the 910 cam carrier would be a drop in replacement for a 907 engine?? Anyone done it or know of someone who has?

I might of asked this along time ago.

--Rich F
'79 JPS #040
'95 S4s ...SHF63000

Yes, I have done this on my 1974 Jensen-Healey
I have a 910 cam carrier on the exhaust side of the 2.0L 907 motor in my Healey.
I did it a few years ago and I don't recall any unusual issues.

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Hi Rich, Basically yes and it does make for a better oil seal without the wrap around cam cover. I think the 907 carriers may be interchangeable but the 910 carriers are specific for intake or exhaust so watch that you get them right way around when you install them. The difference is just in the angle of the drain drilling but they are marked I and E on the right front corner on top.?

I am guessing one would need to re-shim all the tappets.
--
Rich F
'79 JPS #040
'95 S4s ...SHF63000

If you install different cam carriers, then yes, you'll have to re-shim the valve clearances.

If you wish to get real specific about it, you would also need new tappets, unless the new cam carrier came with it's old/original tappets already in place. The tappets and the bores in the cam carrier wear-in together, and are hence forth a matched pair. You shouldn't mix used tappets back-n-forth between bores in one carrier, or between different carriers.

Regards,
Tim Engel


12/15/2023 12:47 PM CST Rich Flowers <richnpeg@...> wrote:

Thanks for information regarding tappets Tim

Just need to find someone selling them
--
Rich F
'79 JPS #040
'95 S4s ...SHF63000

Rich,

JAE and Garry Kemp in the UK both sell them. However, their available inventory (crown thicknesses) seem to vary from order to order. So ask what thicknesses they have in stock (it's like buying valve shims), and order what will work best for you.

The thinnest valve shims sold (only Lotus sold them) were 0.060" thick. You really can't go any thinner. Choosing tappets with thinner crowns will leave room for thicker shims, which will accommodate more years of valve recession (ie, the valve clearances closing up).

Also, if you have the option of tappets with longer or shorter skirts (the overall height of the tappet), go with the tallest skirts you can get, consistent with the crown thickness you need.

Regards,
Tim Engel



12/21/2023 3:32 PM CST Rich Flowers <richnpeg@...> wrote: