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Hi. I have a problem to start my 74 supreme when it is hot. I thought at first that it is the alarm system, but when the alarm is on the starter spins the engine but won't start. The problem is that the starter doesn’t spin when the engine is hot. Can someone guess what is the problem?
If you only have a problem when eng is hot and all is ok otherwise, you are having a Heat Soak issue on the starter. You can try using a started insulation mat for the starter and solenoid or buy a new starter. Assuming you have a good battery.
Had the same issue on a different car and I ended up going to a geared starter.
Good Luck
Jerry
Thanks jerry. found on ebay two types of starter insulation. the first is 0.032 thick aluminum shield. and the second is starter heat wrap. whitch one will you recomend?
When hot, does the starter do anything at all, does it click, does it turn the engine slowly?
If it does nothing at all have someone hold the key in the start position and have someone else hit the starter with a hammer. If it starts when struck with the hammer, the starter is bad. Be careful when hitting it with the hammer as the car may start...block the wheels, car not up on jacks, etc.
Thanks bear! only when the engine is hot it happens. No response at all. I tend to believe that it is heat shock because it starts well when the car is cold. But I'll keep your advice in mind if isolating the starter from heat won't work.
If I was using a heat wrap I would use one that covers both starter and solenoid. But be advised, I ended up replacing my starter. Sugar Bars suggestion is a good trouble shooting suggestion. With the price of starters now. I would go ahead and replace it. But that's just me.
No friend. The price is low only at the us. I am from israel. Usualy i will pay expansive shipping and tax for the part and the shipping. The price is more then tipple that way.
If it does nothing at all when hot, the starter is defective. Wrapping will not fix it. Replacing the starter will fix it and wrapping and/or shielding will help the new starter.
Sorry I didn't Catch that you are not in the USA. Sugar Bear is correct, if the starter is bad then heat wrap will not help. But if price is an issue, then I would give heat wrap a try. If you end up replacing the starter then you can reuse the wrap on a new starter.
Check the stater wire at the starter. Mine was nearly broken/burnt through. The car would start fine cold but hot would not start. New wire no more problems.
Do not diagnose problems by replacing parts. It gets expensive.
You said that the starter does nothing when the car is hot.
If that means that the solenoid is not clicking, then you have no idea whether the starter is good or bad, because the solenoid is not even turning the starter on in the first place.
The first thing to do is to confirm whether you are getting adequate current to the solenoid to make it pull in.
The most direct (though a bit annoying) way to do this is to remove the starter and attach a second wire (10-12ga) to the S terminal, and run that wire (AWAY from the exhaust manifold) up to where you can touch it to the (+) battery terminal when you want to.
Use the car, and then when it is hot, and it won't start, open the hood and touch the wire to the battery terminal.
If it cranks, the problem is in the solenoid wiring, and not the starter or the solenoid.
If the solenoid clicks but the starter doesn't turn, the problem is likely the starter.
If the solenoid doesn't click, the problem is a bad solenoid, or a bad ground.
Thanks for all of you. I wrapped the starter with earth wool that i took from air conditioning tube. The car started well after i installed back the starter, but it will take a while until I'll take the car to a long drive and find out if it worked. Promise to keep you posted.
We usually say "para para". Which means, one thing at a time. I truely belive that this is the solution for the problem. It was quite a struggle to do it without a lift. Of course I'll apply the rest of your advices if the problem is not solved.
O.K. I thought I salved the problem by isolating the starter. Drove the car nicely today. was driving on a traffic jam. Turned the A\C on and the engine turned off and once again did not start. I tapped on the starter' and nothing when I turned the key nothing happened. Not even click of the solenoid. After few minutes when the engine cooled down it started.
I guess I'll try erics advice to check the solenoid.
Google "nova resource remote starter solenoid" . I used the alternate method at the bottom of the page on my 73 Pontiac and my 71 442. No more hot start problems.
X2 on the solenoid. Double check your wire connections at the battery and starter to make sure they are all clean and tight. Make sure the area where the starter bolts to the block is clean, both the starter mounting pad and block pad..
Every connection (battery, starter, neutral safety switch, ignition switch) and every inch of small gauge wire increases resistance and contributes to voltage drop.
Every connection (battery, starter, neutral safety switch, ignition switch) and every inch of small gauge wire increases resistance and contributes to voltage drop.
+1. There is no reason to construct complex add-on systems with aftermarket parts, when the factory parts work just fine if in good condition.
These cars had no trouble starting in the 1970s and 1980s.
Diagnose the problem first, THEN consider how you are going to fix it.
July 17th, 2016, 12:18 PM
