yes, the old trick of double-nutting will extract the stud a treat. I've used that method in exactly the same place doing a Lucas to Bosch conversion as you need to move the studs to their alternative positions.
I recommend you replace the stud. One should be available at any breakers and again double-nut it out...
Hope all goes well from now on
Exactly my findings! I don't believe diesel goes like this as I've had jars of diesel sitting around for months on end with no apparent deterioration and I'm with you, in that what we're seeing is WVO residue. Taste it and see if you can taste any KFC or MaccyD in it!!!!MikeT wrote:I'm now convinced that all the orange contamination seen was gum/varnish and not rust (except the external distributor head).
Again I agree that SVO is not going to cause any issues like this. It'll go sticky but soon clear once diesel runs through.
The gumming up is likely to cause initial problems but you'll have seen it cleans up quite readily so diesel running through should eventually
ungum it. What does worry me though is the effect it can have on the timing device. Did you notice just how fine the metering hole is in the piston? A bit of solid gum will soon block it for good and in one case I've had to poke it clear with a fine wire. Likewise, I've seen this varnish seize the metering valve in a Lucas so solidly that the engine would not start.