The Lotus Grand Tourers

I intend to adjust the Shims in my 912 Engine because one valve is very Noisy.
I know to do this I must take off the Cam Carrier with care to hold the Buckets in place with Strong Magnets.
The problem is I have broken out the side of the Head of one of the 4 Pan Head Torx Bolts on one Bank by using a Hex Key.
Has anyone got an idea as to how to remove this Bolt so I can get the Housing off.
I now have a set of Torx Sockets.

RED BARON wrote: Sun Mar 29, 2026 18:39 I intend to adjust the Shims in my 912 Engine because one valve is very Noisy.
I know to do this I must take off the Cam Carrier with care to hold the Buckets in place with Strong Magnets.
The problem is I have broken out the side of the Head of one of the 4 Pan Head Torx Bolts on one Bank by using a Hex Key.
Has anyone got an idea as to how to remove this Bolt so I can get the Housing off.
I now have a set of Torx Sockets.

Hard to say what the best method is. It all depends on whicht bolt, how bad you messed up, how much access you have and the tools available

As said it was one of the 4 Black Pan Head ones that hold the Housing onto the Cylinder Head.
The access is fine as it is one at the top.

This may be naive, but can you not get some mole grips on the remains of the head of the bolt?

RED BARON wrote: Sun Mar 29, 2026 18:39 I intend to adjust the Shims in my 912 Engine because one valve is very Noisy.
I know to do this I must take off the Cam Carrier with care to hold the Buckets in place with Strong Magnets.
The problem is I have broken out the side of the Head of one of the 4 Pan Head Torx Bolts on one Bank by using a Hex Key.
Has anyone got an idea as to how to remove this Bolt so I can get the Housing off.
I now have a set of Torx Sockets.

Are you able to post a picture (or two) of the bolt/location?

I only have Photo from before I broke it. Because I just put the Cover back on so it can be used.
How do I put that Photo on here.

RED BARON wrote: Mon Mar 30, 2026 11:36 I only have Photo from before I broke it. Because I just put the Cover back on so it can be used.
How do I put that Photo on here.

Here's a link that I found by searching on the subject of posting pictures. Hopefully this should work, although I know that there have been problems:

viewtopic.php?f=7&t=11571

Update : I've also just found this comment from anothe forum member:
Move picture to One drive, right mouse click, select "One Drive" then select "view on line".
Picture then opens in a new Web page and the Embed routine is pretty much as Alan described a couple of years back in his short video.
Hope this does the trick

RED BARON wrote: Sun Mar 29, 2026 21:20 As said it was one of the 4 Black Pan Head ones that hold the Housing onto the Cylinder Head.
The access is fine as it is one at the top.

if the head is accessible grab it on two opposing sides with a pair of carpenters pincers (with unmolested jaws)

Or drill of the head if the remaining shank sticks out enough for purchase when the mounted part is removed

That was my guide when Onedrive was good.
Unfortunatley, Onedrive has changed lots of things and are now rubbish.

I’ve now changed to using Flickr.

To remove what is left I suggest you take a photograph and ask your local garage if they can weld on an extension bolt and spanner off.
With a bit of oil splash you may be able to drive to the garage.
It is all metal around the bolt and nothing much to damage with the heat, Mig weld, good luck.
By the way, measure the follower gaps before you dismantle, you need to know the before to enble obtaining the correcting new shim(s).

Dave the cog.