Took the EK for a run last weekend and she was missing badly under load.
Pulled the plugs out today, all were pretty black except one.
Which was sitting in some sort of sleeve about 5 - 10mm higher than the other plugs.
What is this sleeve and can I remove it?
Pictures below;
That looks pretty dodgy mate! I would say the original thread has been stripped and an oversize insert in the form of that sleeve (which looks a bit like the base of one of the old two piece 18mm sparkplugs) has been whacked in. The only way you will know for sure is by removing it and comparing thread diameters which I will bet won't be the same. Std is 14mm x 1.25mm. After that it's either live with it or fit a 307 !!!
From where I am sitting (at my kitchen table - place of infinite knowledge) there is no other logical explanation, nor any practical reason for that sleeve poking out of there unless someone else has other ideas?
Ok, assuming the original thread was buggered & the sleeve is staying there.
It would be best to work out difference in the clearance to the piston & look for a plug with a longer thread.......yes??
That 'sleeve' is a device that is supposed to help stop spark plugs from carboning up in worn engines that had oil control problems and hence the problems with spark plugs always carboning up.
It is still sold in a magazine that I buy here and there ( Restored Cars from memory ).Can't remember what they are called? .Never used them and can't really say that I've spoken to others that have used them so don't know if they really do the job they were designed for. I think they were designed for older engines of the 30's and '40's and evolved into what they are in your pic.
If your plugs are carboning up you could try a higher heat range plug, sometimes that can lengthen the time period between pulling out carboned up plugs and cleaning them in a worn engine.That was the way of thinking in the early engines.
FB MAD wrote:That 'sleeve' is a device that is supposed to help stop spark plugs from carboning up in worn engines that had oil control problems and hence the problems with spark plugs always carboning up.
It is still sold in a magazine that I buy here and there ( Restored Cars from memory ).Can't remember what they are called? .Never used them and can't really say that I've spoken to others that have used them so don't know if they really do the job they were designed for. I think they were designed for older engines of the 30's and '40's and evolved into what they are in your pic.
If your plugs are carboning up you could try a higher heat range plug, sometimes that can lengthen the time period between pulling out carboned up plugs and cleaning them in a worn engine.That was the way of thinking in the early engines.
Your right on the money there, Terry!
Their inserts to so call minimize carbon fouling, and prolong plug life. Typical Market gadget man Gadget, just like the spark increaser, could transform your old points system to this amazing electronic ignition High energy spark discharge.
I can still remember Old mate in his Burgandy HQ 308 Statesman at Flemington Markets trying to flog those units off by the dozen..
