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| | | | Joined: Oct 2009 Posts: 19 'Bolter | | 'Bolter Joined: Oct 2009 Posts: 19 | I purchased a 1953 Chevy 5 window 3600 flatbed pickup truck a week ago. The engine will not turn over. We have tried to break it loose by the flywheel and have moved it some. Does anyone know if this vehicle would be a positive or negative ground system? | | | | | Joined: Jun 2009 Posts: 2,201 Shop Shark | | Shop Shark Joined: Jun 2009 Posts: 2,201 | originally it was a 6 volt negative ground system. | | | | | Joined: Mar 2007 Posts: 4,215 Moderator | | Moderator Joined: Mar 2007 Posts: 4,215 | Chevy negative, GMC positive | | | | | Joined: Jan 2008 Posts: 502 Shop Shark | | Shop Shark Joined: Jan 2008 Posts: 502 | If you haven't already put lots of oil in the cyls. and rock the motor one way and the back the other. Kinda sounds like the cyl. walls have rust on them and the pistons are not wanting to slide up the rusty cyl. walls.
Do this with the spark plugs out so you're not working against engine compression.
Dan
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101st Screaming Eagles
| | | | | Joined: Oct 2009 Posts: 136 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2009 Posts: 136 | I had one froze up, put marvel mystery oil in cylinders and let it sit for a few days, cranked it that weekend, be in well ventilated area though, I'm still coughing from it. | | | | | Joined: Jul 2005 Posts: 595 Shop Shark | | Shop Shark Joined: Jul 2005 Posts: 595 | marvel mystery oil works great as does diesel,atf kroil... when you finally decide to fire it off do yourself a favor and USE NEW PLUGS! a fully chargesd 12v battery is also nice. | | | | | Joined: Sep 2009 Posts: 34 Apprentice | | Apprentice Joined: Sep 2009 Posts: 34 | a fully chargesd 12v battery is also nice. Hope this is still on topic enough. I have a 49 GMC pos. ground. not to sound stupid (more "new") when using a 12V to start a 6V system, I know not to turn anything on(lights, switches etc.)And I assume hook up the 12V pos. ground also. Then does it matter how long you run it while attached to 12V. ? Will it hurt any igntion parts (coil) or relays or anything if left to run awhile? Thanks! | | | | | Joined: May 2001 Posts: 7,438 Extreme Gabster | | Extreme Gabster Joined: May 2001 Posts: 7,438 | Are you jumping off a 6V battery or using a 12V in place of a battery? Definitely use neg to neg and pos to pos if using the 6V battery. I would be reluctant to leave 12V hooked to a 6V battery for long.
If you just want to start and run the engine for a few minutes, I would disconnect the battery cable from the starter and attach the jumper to the terminal and run a hot wire to the coil. This will prevent 12V from getting to your gauges.
Extended use of 12V without a resistor for your coil will result in premature points failure.
By the way, it is better to ask a new question in a new post rather than attach it to another post. | | |
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