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About GeneralMotors

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  1. Hi - I am desperately looking for a 1935-36 Olds differential Ring Gear and pinion set. Or the whole differential of course Thanks Rob
  2. Found my old thread and thought about updating this for general education purposes of everyone looking into this I had discussions with the techs at Optima back then and was told that it will never be possible to properly charge and balance two 6 volts betteries with one 12v alternator. So I have been running a 12v alternator with a 12v yellow optima and a 6 volts alternator with a 6 volts optima, placed flat on top of the 12v one. The ground is shared but the positive is sourced differently in teh system. This setup has been working flawlessly since 2007 to power my 6 volt car (negative groun
  3. I use a High Power Impact wrench (Truck usage, not cars) on my 1946 @ 47 Cadillacs rear drums, never had any problems to remove it on the first try. The puller I use is a German-made Kukko puller, truck wheel type with 5 legs on a rotating axle which is easier on the studs than the cast type. The impact wrench was $400 and the puller $200. A car-type impact wrench will not be sufficient. See the photo: http://bigcadillac.com/jan07/puller2.jpg GM
  4. <div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">You can run a split system with 2 6 volt batteries wired in series for the 12 volts and pull off individual battery for 6 volt stuff. </div></div> this won't work, batteries will un-blance and go flat quickly. the solution i have installed in my 1947 cadillac is to mount a second alternator for the 12volts and add a 12v battery wiht the + and - connected to the alternator. ground is on the 6 v for the car. I use a 12v optima and a 6 volts optima on top of it. i also
  5. advertising-ML-440508-ML- Moved to Commercial Advertisements...Peter J.
  6. http://www.onlinetiresupplies.com/site/763839/product/704 http://www.nytechsupply.com/techtire/tech_prod2.htm This "Rub-o-matic" works great to remove dirt scratches and heavy sticky dirt on white-walls. I used it on my new 700-15 firestones WW and was suprised how powerful and easy it is. Just a little bit of liquid and a clean towel is enough. Several tire shops around here are using this product and it does not seem to harm tires. This is an industrial rubber cleaner, I also have the "Westley's® Bleche-Wite" but this one is less effective and requires water washing afterwards. GM ** just t
  7. thanks for all the answers ! I do use the nylon cages on my other 1948 buick and did not have any issues so far. Those seem to have a more precise, tighter fit than the old NOS type. The balls holded by the nylon cages seem to be kept at a better even distance from each other compared to the stamped cage design. However, as posted above It looks like overtightening it might cause more friction, and heat due to the additional friction might expand the whole assembly and cause more heat and eventually meltdown. So the conclusion would be that a bit looser is better than a bit tighter when it co
  8. Hi All, I just changed the inner and outer bearings and races on my 1947 cadillac front wheels, it now has the federal mogul,black molded bearing ball holder. Very tight tolerances and nice fit. Before there was the old "new departure" stamped ball holder type. The question is how much should I now tighten the nut holding the wheel. If I tighten it to the maximum, I cannot slide the cotter pin. To be able to slide the cotter pin I have to back-up the nut a bit but then the nut becomes quite loose such as it can be easily turned by hand. Not sure what the right balance of torque is best here...
  9. i got that one : its a SPAL fan http://www.macsradiator.com/browseproducts/6-Volt-Electric-fan.html
  10. Ok thanks a lot for the very good suggestions here ! I'll check the timing & heat at the wheel hubs over the week-end. Oil cooler idea is great too I will see how I might add this. On my 47 caddy there is no Oil filter or outside oil lines. I'll keep the 6 volts system and just add another 12 volts anlternator, there is enough space to place a 12volts battery (optima yellow) and a 6v optima on top of it and have both systems.This shouod be done soon since I already made the braquets. The other advantage I can see with that 12/6 volt setup is that the 12 volt fans and 12 volt stereo will no
  11. The electric fans I am putting are 3 spal 10" puller fans in place of the mechanical fan. http://www.spalusa.com/fans/automated/tech_sheets/2057-2058.pdf 2 at the top and 1 at the bottom. those are rated 1070 cfm each and draw 10 or 12 Amps so we have a maximum total of over 30 amps on 12 V..a small motorcycle battery will not last very long. That same CFM would maybe draw 60 Amps on 6 volts if I were to use similar power 6 volt fans..a 6 volts alternator is maybe generating 50-60 amps. In case the fans are on for a long time that could be a bit risky. I also have a 500ci cadillac engine that
  12. Ron, thanks for your input. Did not know about Scott`s fan, I will look into it. I use a 7 pounds cap. However, since water boils at about 212F and my other car never goes above 180F using the electric fans, the cap should not really matter if the cooling circuit is efficient enough... In terms of original design, I doubt that the car was designed to handle lenghty parade style driving speed in tropical heat or idling over an hour in mid-summer. I did found an empty spot on the driver bottom front side of the engine, under the fuel pump where I can place a second alternator. I already welded
  13. MCHinson, thanks for your suggestions. I am using a newly re-cored radiator in this car. It is a 5 row copper-brass with a very high fin count and tight space between the tubes (about 7/16"). It has the potential to cool the water much better than the stock, plate fins radiator. I used the same desing in my other car and it works great wiht electric fans. However, I found out that this design does restrict airlfow, it requires a stronger airflow if not water will boil quicker than using the stock radiator. I have replaced all 4 hoses with new ones, a new 180 thermostat and I also tried withto
  14. The reason is that I want to add electric cooling fans to replace the mechanical fan. Mechanical fan does not pull enough air to cool the water/coolant mix in the radiator at critical times, such as after steep hills or very slow traffic in very hot summer. It will boil over. Maybe it worked fine 60 years ago with the traffic at that time but for where I live its just not working. I did some tests with using after-market mechanical "heavy duty" flex blade fans, using a shroud etc.. which gives a better result than the origianl 4 blades fan, but still this is a far cry from what electric fans w
  15. Ok I see thanks for the reply. Here is another idea then: connecting the 6v starter to the 12 v battery using a smaller diamater cable to introduce some resistance on purpose. cable may overheat but thats a small risk compared to burning things inside the starter. GM
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