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| | | | Joined: Oct 2006 Posts: 55 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2006 Posts: 55 | I have a 54 235 engine in my 46 truck and when it gets hot the engine turns over slowly and will start sometimes and other times will not. I have just replaced the starter. It starts fine when cold.
b51r
b51r
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | It could be a number of things but to small diameter battery cables is the most common problem.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Oct 2006 Posts: 55 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2006 Posts: 55 | I have all large battery cables on it. It is also a 6 volt system
b51r
b51r
| | | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | What's your timing set at? Sounds like you have too much timing. | | | | | Joined: May 2005 Posts: 8,983 Sir Searchalot | | Sir Searchalot Joined: May 2005 Posts: 8,983 |
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
| | | | | Joined: Jun 2011 Posts: 1,901 Shop Shark | | Shop Shark Joined: Jun 2011 Posts: 1,901 | x2 48gmc's suggestion. I found that adding the vacuum gauge to my timing regime made a world of difference  probably because I found it hard to find 28* past the bb in my search for the dist. mech/vac/total advance  while trying to adjust for today's fuel...
Give me ambiguity
or give me something else
| | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | If you can demonstrate the problem at home, try powering the coil with a battery charger.
| | | | | Joined: Sep 2003 Posts: 200 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 200 | Sounds like a bad ground to me. I had the same thing with my '51 216. Found corrosion on frame to block ground strap. Cleaned it and problem was gone. Check all your grounds. This is a 6 volt system too.
Hope this helps.
Mark
1951 Chevy 3100
Some days you get the bear. Some days the bear gets you.
| | | | | Joined: May 2007 Posts: 1,718 Moderator: 60-66 Trucks; North Eastern Bolters | | Moderator: 60-66 Trucks; North Eastern Bolters Joined: May 2007 Posts: 1,718 | I am having a problem similar. Who said timing? My battery appears strong and the motor turns fine (when warm) but struggles to fire. Cold it fires right away. If timing - which direction. Advance it or other way? What is actually happening? | | | | | Joined: Oct 2012 Posts: 233 'Bolter | | 'Bolter Joined: Oct 2012 Posts: 233 | retard timeing to start easier. Advance for better performance and fuel economy. ALL witin reason
1953 Chevy 3100 261 and SM420 53Chevy 31001953 Mack Firetruck 1972 Porsche 911 1986 Honda Goldwing
| | | | | Joined: Feb 2000 Posts: 5,195 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,195 | A slow crank when hot is a voltage problem. You need 00 or 000 gauge cables with really good clean ends on a six volt system. Thats positive and ground. Make sure there is no paint under the terminals and use star washers for better contact. Check the voltage at starter when cranking slow,that will tell you a lot. Don't try to check amps with out a really good heavy meter!
Bypass the key switch with a wire straight from batt to coil when its hot. This will tell you if the wire harness is good. Checking voltage at the coil is good idea and can help diagnose the problem.
Joe
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