From: Julian Burke (julian@knology.net)
Date: Mon Oct 10 2005 - 14:56:07 PDT
Folks,
I need to reiterate here about glow plugs. There are no specific "24
Volt" glow plugs. If you have read my many articles on the CUCV glow plug
system, you would understand this further. A "12 volt" glow plug will heat
up very fast with 24 volts. This is how "quick" start systems work. It
must NOT be left on for any period of time. 5 seconds may be too long and
you need to be careful. I don't recommend changing out the glow plugs in a
CUCV with "24 volt" units. They may take a long time to heat up to
temperature. Lower voltage plugs are commonly lit with a higher voltage for
faster starting but at shorter periods of time.
The plugs that come with a CUCV are just fine, need not be replaced
with another value unless you want to re-engineer the system which is NOT
worthwhile. The stock plugs that come with a CUCV are heated with 12 volts
for about 12-16 seconds on a cold morning. (perhaps more or less) This is
all you need. Be very careful when changing plugs to another value.
Another point to consider: NO auto parts houses ever have any spec sheets
for any plug you buy. So what are you buying? They sell by application
only in most cases. The link below for Diesel Supply are touting their
replacements as what "our" armed forces are using in all 6.2 and 6.5 liter
applications. BS!!! I know of NO application in our military system that
uses these style plugs nor am I aware of any GSA system that is buying this
style. All Hummers use the round electrical terminal which they say they
will have to special order for you if you want those. Nonsense. Don't fix
something that ain't broke!! The problems that the Hummers were having
early on was in the controllers, NOT THE GLOW PLUGS! Welman and GSA had
lengthy round table talks about this issue and was only resolved in the last
few years. Now Welman doesn't sell half the amount of replacement plugs to
Uncle Sam they used to.
If you archive my articles/postings, you will know how/why to eliminate
that resistor and you will also know why that resistor was used in the first
place which gives you the option if you want to keep it or not. Both ways
have advantages and you need to know, should you keep it or not.
I discussed this issue with Frank Walton, former Chief Engineer with
Welman manufacturing in Shelbyville, IN. who manufactures most all of the
glow plugs for GSA and military requirements. Only through him did I get
specs for glow plugs. This info is NOT at NAPA, Pep Boys or other parts
houses. Remember, it's all in the timing, NOT what voltage the glow plug
is!! Julian Burke
> James, I agree with you totally. I fully intend to keep my 24v system as
> well. The only thing different I plan to do, is eliminate the resistor
> bank, and toss in a set of 24v glow plugs. I will get them from the
> following link:
> http://www.ssdieselsupply.com/product_90_SSD_Glow_Plugs_for_24_Volt_Military
> _Vehicles.html
>
> These glow plugs are the super fast heating, self limiting type. Plus
> with
> eliminating the wasted energy via the resistors, they should promote cold
> starting even more!
>
>
This archive was generated by hypermail 2.1.4 : Tue Jul 18 2006 - 21:30:39 PDT