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Hard starting when hot

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4JSAToo

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1955.1 235ci starts cold great..runs great too..Stop after driving awhile [enough to get the engine hot] starter will slowly turn the engine over but not fast enough to start. I suspect that the starter is getting too hot. Must add that if I let the truck sit for a half hour to forty five minutes it starts up fine.If you guys agree with me that it's probably the starter..how do I keep it from getting too hot? Thanks in advance.Bob:-)
 
I replaced battery cables a while back with extra heavy ones that I had made up so that'e not a problem. Bob:)
 
Bob,
The problem can be as simple as the starter getting too hot due to your exhaust or the brushes in the starter being too worn. Both can heat up the starter too much and cause the slow starting.

If your exhaust is creating a lot of heat, radiating down on the starter, GM makes a heat shield (as well as aftermarkets) that will help disperse the heat.

I had a 1951 a while back that did the same thing. The problem I had was the starter itself being very worn.

Hope this helps,

Dr Mike
 
another possibility is heat soak to the carburetor,so that there is no liquid fuel in the bowl or fuel line,so that it is hard starting even though it cranks easily?
 
I have seen after market heat shields but not for AD series trucks. I'll keep looking.
Thanks for the help all.



Bob:)
 
Check your timing. It may be advanced to much. The mechanical or vacuum advance may be stuck in the advanced position. Timing advanced to much can make it hard to start when hot.It will run GOOD but hard to start when hot. Common w/ the v8's . My dad along time ago would start it up and then advane the timing and then street race. Let us know the fix. We can all learn a little something . Brandon:7
 
Well guys it looks like the starter isn't or wasn't the problem at all. The accelerator pump on the carb had to stick for me to find out how messed up the carb was. Pulled the carb [single barrel Rochester] bought a rebuild kit. As soon as I took the carb off the intake problems were easily seen. Throttle spring installed incorrectly and pumprod stuck in the up position. Float drop was adjusted 3/8 of an inch off or possibly not adjusted just thrown back together. Cleaned and re-assembled with new innards..WOW. Truck never ran so good at least not while I owned it. Never considered the carb being the problem because the carb was rebuilt here in Tucson 6 months before I bought the truck. I still have the receipt for the job. They charged PO $170 for the job too!
Bob:)
 
Bob ;

Don't forget to adjust the valves too , 99 % of the 235's I work on have tight valves, they must only be adjusted with the engine HOT .

-Nate
 
I don't know about a 235 but I had a hot-start problem with my 350 and nothing I tried seemed to matter until I ran across an online article about the problem. It had insructions on how to wire up a Ford solenoid (relay?) to the starter and I haven't have any trouble since.

Stepside57 in the Central San Joaquin Valley of California
 
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