Ceramic plug caps fit like a glove.

[NZ fan]

Hi all, if you are needing new extenders I can recommend these as an alternative. I fitted them along with a set of bpr6es plugs around 2000 km,s ago and they have been faultless. I also fitted a set of heat proof socks as well but I now feel they were unnecessary as the ceramic part comes up past the header anyway. They do come un finished so you need to cut to length and crimp on the dist. Contacts. The angle on them is perfect to fit through the available gap which was a releif as I ordered them without this knowledge. So far showing no sign of problems will see how they are after a 1000 km trip planned this weekend.

[NZ fan]

SILICONEKID345HP said:

If the lead snaps off you have shot it ! You may need two sets.

to be fair this is a valid point, having had these on for some time i recently removed one to see how they were getting on... it was reluctant too shift so i used a hook tool under the end of it to get it off. i re installed it with a bit of "vasso" that i had handy but don't expect that to stay long with all that heat.
might have to find a suitable heat proof non conducting lube to use on them.
{the lead still looked like new so handling the heat no problem}

[NZ fan]

bobfather said:

Ceramic being a brittle material I'm concerned about the amount of force some people require to apply to disconnect from the plugs. I have seen earlier comments on connector lubrication here but in a hot environment lubrication will volatilise and therefore have a limited life. The lubrication could eventually become a cement which could exacerbate the stiction issue. Is there any follow-up on the long term effectiveness of the lubrication? Perhaps annual clean and reapply would help.

I was thinking about making a tool that could slip under the ceramic cap so that the removal force would be compressive to avoid any tensile and possible bending forces for which ceramics are weak

well said Bob, after using these for a year or so and around 12000km,s i have indeed had trouble removing them and i originally thought it was the rubber sleeve sticking to the plug even though i used dielectric grease on them? until recently when i had trouble removing one of them even with a hook tool under the ceramic so as not to break it {as you so clearly pointed out} i got it off but the metal end piece remained attached to the plug. so it appears that the problem is the metal clip on the end which is far too tight on the plug. this i remedied by using a dremel tool to grind down the little "pips" inside the metal piece until it was a nice click on fit on the plug so i would recommend doing this to the leads before fitting as they are a ridiculously tight tight fit out of the box.
other wise they are fairing well and it was easy enough to slide the ceramic piece up the lead to re-trim and re-attach the end.