Engine overheating?

[chris1htx]

hello all i need some input. after a good drive in my 84 C10 i shut it off and come back 15 minutes later to leave, but it doesn't want to turn over. once it does i have to give it a little more gas than usual to get it going. i'm thinking because the engine is too hot. when i drive short distances it starts right away. i have not put a temperature gauge to it, any ideas on what can be going on?

[donut]

Timing? Cables in good shape and away from heat? Headers?
You didn't pull the battery out of the lawnmower did you?

Could be many different things, but the basics say, battery, cables, timing...
Fuel is more than likely something completely different

[tucsonjwt]

Does it get hot in Houston?

A couple of thoughts:

Heat soak on the starter/solenoid. Some posting here do not believe that this exists. My 454 has it. I have tried remote solenoid, dual start batteries, GM high torque mini starter. It will always start, but I have to hold the accelerator all the way to the floor when starting hot and keep it about half way down for about 5 seconds until it idles normally.

Vapor lock at the carburetor. I have not tried a carburetor spacer because I do not want to mess up my throttle linkage and the air cleaner tube to exhaust plumbing, but that is supposed to help. I did insulate the fuel line from the fuel pump to carburetor but that did not help.

The heat soak theory goes something like this. You have cooling from the fan and radiator when you are driving, but when you turn the vehicle off the engine/trans continue to radiate heat without any cooling and the temperature of the engine bay goes up - putting stress on the starter/solenoid and possibly causing the fuel in the carburetor and/or fuel line to vaproize. With a big block like mine, this is a LOT of heat.

Of course, a new good quality solenoid and/or starter might help, but in HotZona a new stock starter/solenoid was no help. You can have AutoZone or similar parts store check your starting/charging system for free, but make sure you do it under the same conditions. Likely it will check out good anyway. You could theoretically have a bad alternator resulting in a low battery charge, but if you let the truck sit for an hour to cool off and it starts right up, then it is not the battery/alternator.

[chris1htx]

95+ degree days in a dark grey truck, gets pretty hot

i might have the starter/solenoid switched out. 29 years, maybe time for a little upgrade.

[geezer#99]

You can change the starter, you can clean and replace your cables, you can try a mini starter but ultimately just wire in a remote solenoid and put a heat plate/spacer under your carb.
here's a link to the solenoid.
http://67-72chevytrucks.com/vboard/s...d.php?t=475748

[Rufton]

Sounds like you have 2 problems.
1. Heat soaked starter system.

2. Vaporized fuel.
Not unusual for fuel to boil out of carb bowl and fuel line after hot shut down.
Vaporized fuel may cause a rich start condition for several minutes after hot shut down. I like to set fast idle (manual choke) before hot shut down to allow any boiled over fuel an easy escape. I restart in fast idle position w/o touching pedal. On auto choke I press pedal to about 1500 rpm position and crank w/o pumping. You can see if bowl boiled dry by checking accel pump squirt. You can take steps to reduce underhood temps and improve fuel line. The TNT solution is add elec fuel pump w/ return line.

[dsanc754]

I live in Houston and had the same problem. The starter and wires get hot and it causes a problem. Thought about doing a remote solenoid location but it only happens in the summer and now im doing an lsx swap. Try a remote solenoid.