Re: 1986 XJS 5,3l V12 HE
On the side of the distributor is an ignition timing eccentric bolt. The eccentric pin has gone missing allowing the dissy to turn at will, Does anyone know where a spare or new part can be obtained? Tks

 

Your in OZ?

I made a pin for the PreHE, never found the missing pin, long gone before i got the car.

Memory???? HAHAHA.

I found a bolt, the right diam, cut it, so I used the plain shank, JJB Weld and tapped it into the hole, which was a bit iffy, so I suspect some clown tried to adjust it too far, and broke it.

It was OK, and once I set that timing, 1992, never touched it to this day.

 

Where is this bolt situated please?

 

If you look at the Lucas dizzy, in the car, you will see an adjuster screw at the edge of the metal body part, just below the cap, in about the 11 o clock position (where straight ahead is 12). Turning the screw allows timing adjustment
The attached pic is of a striped down dizzy, but the slot into which the screw goes is at the end of the blue line.

 

Look down the front face of the diistributor, looking back at you is a largish scewdriver "slot", Thats it.

The underside has a cam and pin arrangement for the fine timing adjustment of the upper section of the distributor.

It has a lock nut, 13mm (AKA 1.2" a/f).

Rarely played with.

It allows a few degrees of adjustment, the numbers fail me now.

If it is Man Handle when it gets to the end of its travel, that pin will suffer.

 

tks: BTW it looks like you can disassemble the unit still in the car - what are the procedures????

 

I have one