1931 chev won't start when hot

I HAVE A 31 CHEV THAT STARTS GREAT WHEN COLD. iT ALSO RUNS WONDERFUL. pROBLEM IS THAT AFTER A RUN AND WHEN i SHUT IT OFF THE STARTER JUST GRUNTS. NEW BATTERY AND BRUSHES IN THE STARTER. THE MECHANICS SAYS THE CABLES ARE THE RIGHT DIAMETER. WHAT ELSE CAN IT BE ?
tHANKS IN ADVANCE. WAYNE

 

we have that same problem with our '50 plymouth. can't go for awhile and then stop and shut her off with the expectation of starting her back up in 5 or 10 minutes. . we purchased and electronic ignition system for it in hopes that eliminating the points will make her more reliable.

 

check to see if the starter is getting too hot due to proximity to exhaust manifold/headers

 

Worn bushings can cause this by allowing the armature to contact the case. Had this problem with an old Chevy. Started fine cold, gave me a fit with the engine hot.

 

Are the cables new or old? Corrosion in the ends where the ends are crimped on can do that.

Will it start with the crank?

How are the starter bearings/bushings on the ends of the armature?? Could be armature dragging on the field.

Clean grounds and all connections, wire brush or sandpaper clean.

 

i used a larger gauge wire from the switch to the starter on my nova and solved the problem

 

clean connections every where !
double check all grounds -engine- frame - body -frame - dash- body-batt-frame

electricity needs a completed circuit

 

Try a ground to the water pump/batt, or pump to frame. A small gnd strap to each valve cover helps.

 

I have a '32 inline OHV 194 and it used to do that. I found that the coil was the problem. Try another coil and see if the problem goes away. I was told mine was getting "Hot."
Normbc9

 

This is likely. I've had the same problem on alot of Chevy starters absorbing heat. Usually doesn't become a problem until August around here. I've done the additional Ford solenoid on alot of my Chevys. Some people don't like it, but, it's cured the problem on every car I've ever done it to.

 

Where is your ground cable bolted to ? If its to the frame run another short cable from the engine block ,can go off one of the bell housing bolts to the frame ,starter needs a good ground.

 

Problem solved I Put a 00 double ought ground from battery to frame and double grounded with another 00 to the transmission. Thank you everyone for your help !!
It was very much appreciated.
Wayne

 

Can't have too many good grounds !!! Glad it's fixed, and thanks for sharing the info.

Happy Roddin' 4TTRUK

 

Welding cable makes great battery cable. It's designed to carry lots of amperage; I replaced my standard battery cables with it and it completely eliminated that pesky Chevy hot-start issue. No Ford solenoid needed.

 

Even better: A voltmeter can be used and will tell the tale in minutes.
(if you take your time between check points)