Why does the starter not turn on hot
Content
More often starter not turning hot due to the fact that when heated, the bushings slightly expand in size, due to which the starter shaft wedges or does not spin at all. also the reasons that the starter does not start hot is the deterioration of electrical contacts in the heat, contamination of its internal cavity, violation of the contact group, pollution of the "pyatakov".
To troubleshoot, you need to get rid of the listed causes. However, there are a couple of "folk" methods by which even a worn starter can be made to rotate with significant heat.
| Breakdown cause | What to produce |
|---|---|
| Bushing wear | Substitute |
| Deterioration of contacts | Clean, tighten, lubricate contacts |
| Reducing the insulation resistance of the stator/rotor winding | Check insulation resistance. Eliminated by replacing the winding |
| Contact plates in the solenoid relay | Clean or replace pads |
| Dirt and dust in the starter housing | Clean inner cavity, rotor/stator/contacts/cover |
| Wear of brushes | Clean the brushes or replace the brush assembly |
Why is the starter not turning when hot?
There can be 5 reasons why the starter does not turn on a hot one, and almost all of them are typical for cars with high mileage.
Starter bushings
- Reduced bushing clearance. If during the next repair of the starter bushings or bearings with a slightly increased diameter were installed, then when heated, the gaps between the moving parts decrease, which can lead to wedging of the starter shaft. A similar situation is observed when regular bushings wear out. In this case, the rotor warps and begins to touch the permanent magnets.
- Deterioration of contacts in the heat. A bad (loose) contact heats up by itself, and if this happens at an elevated temperature, then insufficient current passes through it, or the contact can completely burn out. Often there are problems with the wire from the ignition switch to the starter (oxides) or poor ground from the battery to the starter. there may also be problems in the contact group of the ignition switch.
- Winding resistance reduction. With an increase in temperature, the resistance value of the stator or rotor winding on the starter can drop significantly, especially the unit is already old. This can lead to a decrease in electromotive force, and accordingly, the starter will turn poorly or not turn at all.
- "Pyataki" on the retractor relay. Actual for VAZ-"classic" cars. In their retractor relay, over time, the so-called “pyataks” - closing contacts - burn out significantly. They burn on their own, as they are used, however, at high temperatures, the contact quality also deteriorates more.
- Dirty rotor. Over time, the starter armature becomes dirty from brushes and for natural reasons. Accordingly, his electrical contact worsens, including he can stick.
What to do if the starter does not turn on a hot ICE
If the starter cannot turn the internal combustion engine to a hot one, then you need to dismantle it and check it. The diagnostic algorithm will be as follows:
"Pyataki" retractor relay
- Check bushings. If the bushings are significantly worn out and play appears, or vice versa, the starter shaft does not spin well because of them, then the bushings must be replaced. When choosing them, be sure to take into account the size recommended by the manufacturer.
- Inspect electrical contacts. Be sure to check all electrical connections and wires. If there are poor-quality contacts, tighten them, use a cleaner. Particular attention should be paid to the contacts on the "ground", in the ignition switch and the terminal on the retractor. On VAZs, there is often not enough wire section from the battery (both mass and positive) or the power cable from the battery to the starter rots.
- Check stator and rotor windings. This is done using an electronic multimeter, switched to ohmmeter mode. It is better to check at different states of the internal combustion engine, for a cold, in a semi-heated state and for a hot one, this will allow you to understand how much the insulation resistance value decreases. The critical value is 3,5 ... 10 kOhm. If it is lower, then you need to change the winding or the starter itself.
- Check "pyataki". To do this, remove the solenoid relay from the starter and clean them thoroughly. If they are very burnt and cannot be restored, the retractor (or the entire starter) must be replaced. This is a common problem, why the retractor does not work on a hot one.
- Make sure it's clean cover, rotor and outer surface of the starter stator. If they are dirty, they need to be cleaned. To begin with, you should use an air compressor, and then clean with a brush and, at the final stage, with sandpaper (400th or 800th).
Since all these procedures take time to remove and disassemble the assembly, emergency starting methods will help to get out of the situation and still start a hot ICE with such a starter problem.
How to start the internal combustion engine if the starter does not start hot
When the starter does not turn hot, but you need to go, there are a couple of emergency methods for starting the starter. They consist in the forced closure of the starter contacts directly, bypassing the ignition switch circuit. They will work only in case of problems with the retractor, contacts and slight wear of the bushings; for other reasons, you will have to wait for it to cool.
Location of starter terminals
The first, and most commonly used, is to close the contacts with a screwdriver or other metal object. With the ignition on, simply close the contacts on the starter housing. The contacts are located on the outside of the starter housing, wires fit to them. You need to close the terminal from the battery (power wire, +12 Volts) and the start terminal of the starter motor. You can’t touch the ignition terminal, just as you can’t short +12 V to the starter housing!
The second method involves preliminary preparation, it is used when the problem is known, but there is no opportunity or desire to deal with it. A two-wire cable and a normally open electrical button can be used. Connect two wires at one end of the wire to the starter contacts, after which they lay the cable in the engine compartment so that its other end comes out somewhere under the “torpedo” to the control panel. Connect the other two ends to the button. With its help, after turning on the ignition, you can remotely close the contacts of the starter to start it.
Hack and predictor Aviator
The starter, before it soon completely fails, begins not to turn the internal combustion engine on a hot one. Also, starting problems can occur with weak wires and contacts. Therefore, in order not to be in such an unpleasant situation, you need to follow him and his wiring.
