A loose bolt on CAM sensor

Hey Landy Lovers,

Just doing a service to try get to bottom of a hard start issue.

So far… did a leak back test on injectors and no major sign of leak. Next to dig deeper and change out gaskets and clean EGR valve.

Next up to change high pressure fuel regulator seal.

I just changed the CAM position sensor, but the bolt won’t catch the thread when securing back, just runs free in the hole. It only has an 8Nm pressure rating but can’t get any lock on it at all. Bolt shown attached, it’s the same size as the injector wiring harness clamps.

Any ideas to fix, with trying a slightly larger bolt of same thread style and length?

Also noticed allot of carbon build up near the sensor, maybe it’s leaking because not secured in place? Please see photos.

Many thanks,
Anthony

That is the wrong bolt.
If it is the same as the plastic clamps then it is a self tapping screw.

The cam sensor is held with a threaded bolt.

Check the hole and seen if the thread is undamaged.
From memory it should have a 10mm head size and be a parallel shank bolt.

That looks like the same bolt head as in mine, I've never taken it out so couldn't tell you if it's a self tappers or 6mm thread, see pic.

It's the correct bolt/torx a 5mm socket will undo and tighten it up, if no torque then it is nip up and a 1/4 turn always worked for me.
1

It is similar to the torx holding the injection wiring.
2

3

Remove it and check if you have any plastic swarf on the thread if so then the thread in the cam cover is damaged, you may have to move up to the next size, or re-tap it.

4

What is all that black gunk sealant in the void of injector 1 i wonder if it is leaking from the T joint

OK so mine's not standard then !!

It is a tapped hole so check a self tapper hasn't got swapped in by mistake.