From: Glenn Shaw (mpmutt@mtaofnj.us)
Date: Sun Aug 22 2004 - 17:39:37 PDT
Hi
AC 13G plugs along with AC 9 plugs are all *garbage* and not to be used
according to GM. Throw them away. There was no recall, only GM fix if
the truck was under warantee (90 days on the plugs) . Use only AC 60G
plugs which are temp compensating non-swelling. I have switched my CUCV
trucks all over to them as recommeded by GM, and have never had a
problem. Make sure your glow plug controller is not keeping the plugs
on too long due to a problem with the system. I know you stated that it
seemed to cycle for the proper time, but if it stays on too long even
one time it will pop AC 9 and AC 13 plugs. The AC 60G plugs can
theoretically be left on all day without swelling. Once you change to
the AC 60G plugs you can throw away your glow plug extractor tools :)
Glenn
-----Original Message-----.
From: Ted Hintopoulos [mailto:hint@northnet.org]
Sent: Sunday, August 22, 2004 8:12 PM
To: Military Vehicles Mailing List
Subject: [MV] CUCV glow plugs
Hello all!
CUCV owners might find this interesting.
Has anyone ever come across a bad box of AC-13G plugs???
Changed one out last fall and replaced it with a new AC-13G, one from a
box of 8. This past winter, noticed that it had gone bad and would
require an extractor to remove. Left it till now. The other 7 were fine,
combination of Delco and Wellmans.
Removed and replaced it and 6 others from what was left from this pack.
I was left with one cylinder that had an older AC-13, from a different
batch.
Checked current draw and voltage of each plug, all normal. Cycled the
glow plug system, all normal, engine started, ran it for 2-3 minutes.
Checked the plug current draw and found all but the one old AC-13 plug
had gone open. 4 plugs came out easily with my extractor, 3 simply
unscrewed without any extra help, and the one from an old batch, it
still checked good, came out fine.
Only thing different between the old batch and these new ones is the
insulator color. Old ones were yellow; the new ones, white/light grey
but this probably doesn't mean much these days.
As I said, initially each plug had the proper voltage ( +14) and drew
from 7.5 to 9 amps each. Glow plug cycle duration is and continues to be
normal.
Gonna see if there might have been a recall on these.
Thanks again everyone!
Ted Hintopoulos
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