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Nifty trick for replacing plug wires

  • Thread starter Thread starter WilliamGLX81
  • Start date Start date
W

WilliamGLX81

Guest
Howdy folks.

Today, I pulled my coils off my bike and replaced the wires and wire-ends. First of all, WOW. I bought an electric impact wrench for work, and WOW. It's the best tool I never knew I needed before.

Anyway, there is an epoxy or glue that holds the original wires into the coil. The guides for it I've seen say to chip or scrape away the epoxy, but I found that made it easy to cut the plug wire, which made it quite hard to get ahold of it to pull it out.

Here's my method:
Rather than using a knife on the expoxy, grab it with a pair of flatnose (or needle-nose) pliers and twist around 2-3 turns. It should all come off pretty much in one piece.
Then pull the wire core out. A thin layer of the wire's outer sleeve will be left in the coil. This is easy to remove with a long thin knife (like 3"x1/4") or something else to pull the sleeve loose.
Once the sleeve is loose, push one side of it into the center so you have a shape like (< and grab the < portion with needle-nose pliers. Twist and pull firmly and slowly and it should come out in one piece.

When you reinstall, the easiest way to do it is to apply a bead of silicone around the coil end of the wire about 3/8" from the end and spin the wire as you insert it. This will give you a bit of adhesive to hold the wire in, and also will waterproof the outside. Note that the two different wires on each coil insert different lengths.

Hope that helps somebody!
 
I am about to do some coils and was wondering what folks use as the adhesive around the wire where it meets the coil body. I am thinking just some simple 5 minute epoxy will do the trick???? Wonder how that silicone handles the heat from the coils and being above the hot engine as well???? I was over on Cliffs website and could have sworn there was a wire replacement tutorial...anyone know where thats at???
 
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Depends on the silicone, some of it is very high temp stuff.

I haven't done it myself but one guide that I remember reading used 5-minute epoxy to hold the wires in.
 
For the life of me I cant remember where i saw the tutorial....had pics and a list of adhesives etc etc.
 
Saw that one Dave..but it was more about soldering a failed joint and covering with the putty. This tutorial had pics of the pin down the hole etc etc....

I think I am gonna take a 2 step approach. Highest temp silicone I can find for sealing the wire inside the hole for water tightness purposes.. followed by a bed of 5 minute epoxy around the base to secure the wire to the coil body.
 
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