The Ford Barn

FLTHDCPE · 07-04-2018, 12:30 AM

We ( my crew chief who is also my sweetheart and wife.) have a fresh Flathead built by "H & H Flathead" that runs great, but left us stranded in the middle of an busy intersection when it died and would not start. The temp gauge indicated 200 and it was correct. After cooling it down to 180, it started right up and we got it home. I might add, that it does not run hot on the road, but it was extremely hot that day, and we were caught up in traffic
The car is a 40' Ford Coupe that has been converted over to 12 volt with all new wiring,new battery,new gauges, all new electrical components,new grounds where needed,etc. The ignition system is a "Harman & Collins" distributor, recently rebuilt and tested by "Bubba's Ignition Service" ( he has been advised of this problem and is on board with us ) and giving a "good to go" It has two "Bosch Blue " coils, two "Echlin / NAPA # RR175 condensers, new points, new reproduction rotor and 2nd coil intermediate ring,new rotor, new cap, new wires, and new plugs. In our effort to find the source of our "no start when hot" problem we have purposely brought the engine up to 200 and shut it off, and tried to start it. No fire at the plug. Cool it down to 180 and she fires up immediately and runs great. Our trouble shooting has included checking the coils, condensers and the connections, temporary jump wire from the positive post on the battery to the positive side of the coil, still no start. ( cranks, but no start ) Each time that we duplicate this failure mode ( 200 degree temp) we bring it back down to 180 and she starts.! We are running out of ideas and would appreciate any and all suggestions as to where we go from here. We are excited and anxious to put some road miles on this New Engine in the the 40' Coupe, but right now, afraid to leave Home .

07-04-2018, 12:30 AM	#1
FLTHDCPE Member Join Date: May 2010 Location: Shawnee, Ks. Posts: 58	Engine won't start when it's Hot. We ( my crew chief who is also my sweetheart and wife.) have a fresh Flathead built by "H & H Flathead" that runs great, but left us stranded in the middle of an busy intersection when it died and would not start. The temp gauge indicated 200 and it was correct. After cooling it down to 180, it started right up and we got it home. I might add, that it does not run hot on the road, but it was extremely hot that day, and we were caught up in traffic The car is a 40' Ford Coupe that has been converted over to 12 volt with all new wiring,new battery,new gauges, all new electrical components,new grounds where needed,etc. The ignition system is a "Harman & Collins" distributor, recently rebuilt and tested by "Bubba's Ignition Service" ( he has been advised of this problem and is on board with us ) and giving a "good to go" It has two "Bosch Blue " coils, two "Echlin / NAPA # RR175 condensers, new points, new reproduction rotor and 2nd coil intermediate ring,new rotor, new cap, new wires, and new plugs. In our effort to find the source of our "no start when hot" problem we have purposely brought the engine up to 200 and shut it off, and tried to start it. No fire at the plug. Cool it down to 180 and she fires up immediately and runs great. Our trouble shooting has included checking the coils, condensers and the connections, temporary jump wire from the positive post on the battery to the positive side of the coil, still no start. ( cranks, but no start ) Each time that we duplicate this failure mode ( 200 degree temp) we bring it back down to 180 and she starts.! We are running out of ideas and would appreciate any and all suggestions as to where we go from here. We are excited and anxious to put some road miles on this New Engine in the the 40' Coupe, but right now, afraid to leave Home .