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1. 10:16 AM - Re: [Non-DoD Source] Re: Auto wiring issues (Bitterlich, Mark G CIV NAVAIR, WD)
2. 05:24 PM - Tachometer Yak-18T (Jerry)
Message 1
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| Subject: | Re: [Non-DoD Source] Re: Auto wiring issues |
Hypalon is a very good synthetic rubber.
Silicone has better high temperature characteristics and is better suited for this
particular application.
http://www.enarubber.com/pdf/material-selection-guide.pdf
I might also add that since you have never done this before Lance, you may not
be aware that there is a significant amount of pulling force required to get
the new wire through. Since the wire you are examining has a stranded copper
core with Hypalon insulation, when you pull on it the Hypalon will stretch as
well as the copper core. Copper being relatively soft is likely to stretch and
move within the core jacket. One of the "other" issues when replacing plug
wires in this contained loom that must be considered when selecting non-standard
materials.
Your method using heat shrink /twisting/soldering (etc.) have been tried along
with many other methods. All have merit, and it all depends on which wire you
are replacing as to how hard it becomes to do. My personal favorite is to attach
steel safety wire to the wire coming out, and then using this to pull in
the new wire. The biggest downside to that method is that it can cut through
other spark plug wires in there (easily) without you being aware of it. This
actually happens more than a little bit, no matter what kind of new wire you
are pulling through. The original wire insulation will tend to crack, exposing
the center conductor as you pull the new "whatever" through the loom. So you
end up fixing one engine miss, and creating another. So in some cases it is
best just to bite the bullet and plan on replacing them all. Don't forget that
you are also going to need to assemble 18 new ends to go onto these new wires
to screw onto the Russian plugs as well. Good luck, take pictures and notes
and post your experiences to the Yak-List when you have finished.
Mark
-----Original Message-----
From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of A. Dennis Savarese
Sent: Tuesday, May 03, 2016 8:27 PM
Subject: Re: Yak-List: [Non-DoD Source] Re: Auto wiring issues
The reference to silicone is for the center core (copper or whatever) shielding,
not the wire. ie: Silicone cover instead of rubber like the original wires
are/were depending on your frame of reference.
Dennis
________________________________
From: Lancer <lrob4783@bigpond.net.au>
Sent: Tuesday, May 3, 2016 6:54 PM
Subject: Yak-List: [Non-DoD Source] Re: Auto wiring issues
Thanks for the replies......
I have been using a technique for threading wires through tricky channeling for
years which I am sure will work with the plug wires also
Start by sliding a piece of narrow walled heatshrink onto the wire and then twist
the old wire to the new wire. Solder the wires together so they can't pull
apart, then slide the heatshrink over the join and shrink it in place which will
stop the wire getting caught as you pull it new wire in with the old one.
I just ran a search for 5mm HT wire which came back with more results that I had
expected.......It appears there isn't that much of a problem sourcing it....It's
copper which is not silicone but I'm sure you'd be able to find silicone
if you searched. It is available in pre made plug wire kits so it's out there
http://www.ebay.com/itm/5mm-Spark-Plug-WIRE-Coil-Ignition-Hypalon-Cover-Copper-Core-SOLD-PER-FOOT-/140786539797
Regards,
Lance
--------
You can run but you can't hide
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| Subject: | Tachometer Yak-18T |
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