Excellent point, but I believe most of the heat is generated from resistance losses in the armature and coils, not friction of carbon on copper. Arcing may be an issue there. A temperature of 360 degrees F, plus, is required to melt solder. I don't know if an armature could get that hot. But what ever excess heat is generated is mostly hard on the insulation--and after 40 years, hopefully the engineers had begun building starters to take a licking and keep on ticking. Charles Kettering had the brilliant observation that starters did not have to run continuously so could be designed for "short" bursts of high current. He patented the electric starter in 1915 and it changed the automotive world as women could now easily start internal combustion engines, were no longer relegated to electric autos and hit the road in droves. Progress!!!(?). Kettering was a partner in Dayton Engineering Laboratories Co (DELCO) and was also a co-inventor of Freon. Another post suggested checking the block-to-firewall grounding strap. Always a good idea. The one on my car is intact, but is kind of dainty and certainly designed to assure a good ground connection for lights, fans, accessories and coil--not the starter. Connecting a ground cable to a starter bolt would parallel the existing circuit between the primary ground cable on the front of the engine to the starter--and I think that would be of negligible resistance. One last thought, then let's bury this one for another six months--and that is ignition timing. As the timing is advanced, the engine may be harder to start. C-300'ly, Rich Barber Brentwood, CA 1955 Chrysler C-300 -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of John Mc Adams Sent: Saturday, May 26, 2007 7:18 PM To: artc@xxxxxxxxxxx; Chrysler300@xxxxxxxxxxxxxxx Subject: RE: [Chrysler300] slow starting 55 new yorker This is to all members who may have a 6 volt hard starting early Chrysler. Be careful of running the starter for too long a period. I mean like just keeping the starter cranking and cranking until the engine finally catches. As you are turning over that starter, it is consuming watts (you know like the thing they rate light bulbs with ? volts times amps equals watts). The longer you crank that starter, the hotter it will get. Those carbon brushes are rubbing on the armature causing heat from the resistance between the carbon brushes and the steel plates in the armature. If you keep it up, it is possible to actually melt the solder out of the armature windings causing the armature circuit to either short closed or to open and not conduct electricity any more. I would recommend cranking for no more than a minute at a time and then let it sit for a minute or two to let the armature cool down before cranking it some more. Anyone else out there have any comments on my caution. My dad taught this to me long, long ago and it still makes sense to me today. I have also made my own battery and starter cables in the past. I once placed a battery in the trunk back in my drag racing days and ran cables back into the trunk. I went to the local welding supply shop and bought some 4/0 welding cable (over ¾ inch in diameter) and bought a swaging block to attach the attachment lugs onto the cables. You physically cannot get the copper in the cable hot enough to solder terminals onto it unless you dip the cable and lug assembly into a molten solder pot. Welding cable is made up of lots and lots of very fine wires that are woven and braided into a cable shape. These very fine, woven wires make the cable into a much more flexible cable and I believe it will carry more current as well. I have also used this technique on multiple standby batteries in my neighbors RV. Remember, when the Auto manufacturers went from 6 volt to 12 volt batteries and charging systems, the cable diameter shrunk significantly. I doubt however that the tech inspectors at our concourse meets would appreciate this as a solution. Anyway, just a caution on too much cranking on the starters. Big John Mc Adams (In SoCal) _____ From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Art Cragnotti Sent: Thursday, May 24, 2007 6:52 AM To: 300 Club Subject: [Chrysler300] slow starting 55 new yorker Hi Gang, Art here, In addition to my 300G I also have a newly restored '55 new yorker. It's a crapshoot whether it will start at ahy given time. The motor turns over very slowly like a weak battery, especially when hot. I still have the 6 volt system and have tried everything.rebuilt starter,new selanoid and relay and a new battery. I know these cars started better than this when new so why not now. Ary suggestions??. This is probably a common problem and I hope somebody has a solution. Thanks Art [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! Groups Links To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/ Yahoo! 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