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Discussion Topic:
'37 Flathead quits after 30 min.?
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PBGilmore6 |
11-22-2014 @ 2:08 PM
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Member
Posts: 6
Joined: Nov 2014
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I have a '37 Cabriolet with V8 flathead that quits after about 30 min of regular driving. The temp gauge does not indicate overheating but I suspect it. After about 25 min of rest the car can restart or take a jump/push but will stop again after some use. Once, someone suggested putting ice cubes on the distributor which also allowed me to restart and make it home. I have tuned it and replaced the carburetor, am using good gas, seem to have working water pumps, have replaced the solenoid. Two V8 mechanics have worked on it to no avail. Any help would be appreciated!!
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ken ct. |
11-22-2014 @ 2:39 PM
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Senior
Posts: 1513
Joined: Jan 2010
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Make sure you have a VENTED gas cap on there,i seen that problem before. You will build up pressure in the tank. ken ct.
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cliftford |
11-22-2014 @ 2:44 PM
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Senior
Posts: 845
Joined: Jan 2014
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This sounds like it could be a bad coil and/or condenser. I'd start there.
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ken ct. |
11-22-2014 @ 3:57 PM
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Senior
Posts: 1513
Joined: Jan 2010
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Its a no cost deal to check cap first. ken ct.
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PBGilmore6 |
11-22-2014 @ 4:23 PM
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Posts: 6
Joined: Nov 2014
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I'll check that, but it feels vented.
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PBGilmore6 |
11-22-2014 @ 4:24 PM
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Member
Posts: 6
Joined: Nov 2014
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Replaced both - twice. Checked thermostats too and they passed the boil test - ran it without them at all too.
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PBGilmore6 |
11-22-2014 @ 4:26 PM
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Joined: Nov 2014
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I can only hope it's that easy ...
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PBGilmore6 |
11-22-2014 @ 4:30 PM
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Member
Posts: 6
Joined: Nov 2014
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Here's another clue: I can FEEL it losing power before it shuts down. I have to get on the gas to keep it going just before it quits. Btw, it will idle forever, the cut-out only happens when I'm driving.
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ken ct. |
11-22-2014 @ 5:51 PM
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Senior
Posts: 1513
Joined: Jan 2010
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Possibly a weak fuel pump ??? ken ct.
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trjford8 |
11-23-2014 @ 8:24 AM
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Senior
Posts: 4215
Joined: Oct 2009
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You may have something floating around in the gas tank that is shutting off the fuel supply. Pull out the sending unit and look down into the tank with a good bright flashlight. Had a similar problem with a 39 I once owned. It tuned out to be a small piece of hardened gasket sealer that a prior owner used on the sender gasket. It would float up to the pickup tube and shut off the gas supply. Once the car stopped it would float back as there was no longer suction from the fuel pump. Also if someone happened to use any silicone type sealer on the tank gasket or fittings that stuff turns to a gooey mess when it comes in contact with gas. I'm suspecting something in the gas tank. I don't know if you built the car or not, but if someone used tank sealer in the tank that was not Methanol proof that sealer could be coming loose and blocking the fuel supply.
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