For the best experience on our site, be sure to turn on Javascript in your browser. Starter Motor — How It Works. However, getting it to crank is actually much more involved than you might think.
It requires a flow of air into the engine, which can only be achieved by creating suction the engine does this when it turns over. The starter motor is responsible for turning the engine over during ignition and allowing everything else to happen.
When you turn the ignition on, the starter motor engages and turns the engine over allowing it to suck in air. On the engine, a flywheel, with a ring gear attached around the edge, is fitted to the end of the crankshaft.
On the starter, the pinion is designed to fit into the grooves of the ring gear. The pinion meets the flywheel and the starter motor turns. This spins the engine over, sucking in air as well as fuel.
As the engine turns over, the starter motor disengages, and the electromagnet stops. The rod retracts into the starter motor once more, taking the pinion out of contact with the flywheel and preventing potential damage. There is a small gear at the front of the armature attached with an overrunning clutch.
This is one of the most common symptoms that occurs if a starter motor is bad. Well, failing battery, bad ignition switch, or engine mechanical problem can also because. Which is why the problem must be diagnosed by a professional in the field. If you notice your engine crank slowly, then you should know the starter motor has an internal problem. Although a weak battery and internal engine problem can also cause this issue. So, seeing a good mechanic will help you determine and fix the problem.
If the starter fails to quickly retract soon enough once the engine starts running. A whirring noise occurs when the starter pinion gear freewheels during the engine cranking. This is because the pinion gear is not engaging the flywheel properly, which will also cause the engine to fail to start.
Read More: Things you need to know about Turbocharged Engines. Inspecting the vehicles battery and battery cables to see if they are in order.
A weak or dead battery or faulty cables could be the cause. Using a light spinner to tap the body of a starter motor could also help. It should be lightly done to avoid breaking the component. Tapping might get the electrical part back in contact with each other or clear dirt blocking the parts.
If a starter refuses to start in an automatic transmission, you should try changing from Park to Neutral. This sound silly right! In modern combustion engines, an empty tank can cause a vehicle not to start due to the sensor installed on them.
We also saw the different types of a starter motor, how they work and their bad symptoms and troubleshooting. I hope you enjoyed the reading, if so, kindly comment, share and recommend this site, other technical students.
Tags Automobile engine Automotive chassis Cars clutch Diesel engine starter motor transmission system. Your email address will not be published. Year Year Make Make. Model Model. Beginners Guide. Recommended for you. Cars, tools and vans on YouTube: highlights from Haynes. November 2, How to check your speedometer for accuracy. October 16, What are the best car tools for beginners? Volkswagen Tiguan - Car is not starting - Smyrna, Georgia. Jeffrey was a thorough professional.
Very courteous, friendly, easy to talk to, and he walked me through as he was troubleshooting the problem with my car. I would recommend him to anyone I know, in a heartbeat. Jose 12 years of experience. Request Jose. Mercedes-Benz GL V He is very reliable, respectful and knowledgeable.
I will choose him again to work in my other vehicles. Thank you, keep the work. Need Help With Your Car? Related articles. How to Test a Spark Plug Ignition Coil If you suspect your car has a faulty spark plug, use a multimeter to test it out in 7 straightforward steps. Read more. How to Replace an Ignition Ignitor The ignition ignitor sends a signal to supply power and start the engine.
A common sign of failure is a disruption in the engine's starting process. How to Test a Starter Solenoid Starter solenoids are attached to the starter. Test the solenoid with jump cables - when the solenoid fails, the car starter needs to be replaced. Related questions Car not starting in temperatures over 80 degrees Hi there. This can be a common issue that vehicles encounter when the temperature outside is warm or if there is a sticky starter solenoid.
The solenoid will stick even if sufficient current is applied to its switch.
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