I was changing my spark plugs last weekend and something strange happened.
As I was putting the new set in I got the the last plug no.6 closest to the firewall. Normally the Plug would rotate 10-11 times before I would need the torque wrench to tighten them up. But No. 6 only went around 4 times! Thinking nothing of this I went to put the coil packs back on only to find that now the no. 6 pack was sitting too high to do up the securing bolts!
So I went in again removed plug six and then had a look down it with a torch...
5-6 threads from the bottom was all this black crap. Probably carbon deposits. It was all jammed up in the thread, this didn't allow the plug to go down properly.
Has anyone got any easy solutions to this problem?
So far I have tried the following...
Cutting down a toothbrush (cleaning it up) and then using some carby cleaner to dissolve the carbon.... didn't work
Getting a cheap bottle brush and then using some carby cleaner to dissolve the carbon.... didn't work
Getting a old sprak plug cutting vertical grooves in it (like a tap/die) to collect the gunk... worked but took 6 hrs!
I would really like to know if anyone out there has a better, cheaper and easy solution than this, so I can clean the threads in the other five cylinders!
Thanks in advance