Starter spins but engine don't turn over

i cant dope out that symptoms.

does it crank or not. be clear there.

no car starts (but my 6sp) if it dont crank.

on A/T cars cranking is a first thing. so does it.?

Solenoids do not spin, the stroke only , it a linear motion.

the Sol. moves the pinion and the main contactor switch only.



my guess is the Starter spins and the crank don\'t spin,

you hear the starter motor spin up, it sings. like bird.

that means the starter /solenoid are bad. (crude)

if the battery is good and or jumper starting off a running car.



It can just be a dirty starter pinion, clean it , repeat.

fixed many for this. i have.



battery cable lugs clean, and good. no green rust.

bad cable usually just make a loud THUNK sound. no spin.

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super mb star

Might be your battery is not charger to it's fullness, or pump your gas one time it might not be getting enough gas, it's been cold try it.

Check your battery cables.

You have one of two problems: Either the starter drive on your starter is defective and is not engaging the flywheel to crank the engine, or the flywheel has some broken or damaged teeth that are preventing the starter from engaging.
Starters come in a variety of designs. On some, the solenoid is mounted on top of the starter. When you turn the key, the solenoid routes current to the starter motor and at the same time pulls a lever that slides the drive gear mechanism out so it will engage the flywheel and crank the engine. If the solenoid is weak or damaged, it may not be strong enough to overcome the spring tension that retracts the drive gear. So the starter spins but doesn't crank the engine.
On other starters, the solenoid is mounted remotely. When the starter motor starts to spin, it ratchets out so the drive gear will engage the flywheel and crank the engine. If the drive mechanism is damaged or hung up, the motor may spin but not crank the engine.
Regardless of what type of starter you have, it will have to come out for further inspection. The drive gear (which is sometimes referred to as a "Bendix drive") should move out when the starter starts to spin. The drive gear usually has a one-way clutch that is supposed to protect the starter against damage if someone keeps cranking the engine once it starts. The gear should turn one way but not the other. If the gear is locked up or turns freely either way, the drive is bad and needs to be replaced. If the drive can't be replaced separately, you'll have to replace the entire starter.
Starter Testing If the drive seems okay, the starter should be "bench tested" using jumper cables or special equipment designed for this purpose.
CAUTION: Be careful because a starter develops a lot of torque. It should be held down with a strap or clamped in a vice (be careful not to crush or deform the housing!) before voltage is applied.
A simple no-load bench test can be performed with a battery and a pair of jumper cables to see if a starter motor will spin. But this test alone won't tell you if the starter is good or bad because a weak starter that lacks sufficient power to crank an engine at the proper speed (usually a minimum of 250 to 500 rpm) may still spin up to several thousand rpm when voltage is applied with no load.
A better method of determining a starter's condition is to have it tested on equipment that measures the starter's "amp draw." A good starter should normally draw a current of 60 to 150 amps, depending on the size or power rating of the starter. Some "high torque" GM starters may draw up to 250 amps, so refer to the OEM specifications to make sure the amp draw is within the acceptable range.
If the starter does not spin freely, or draws an unusually high or low number of amps, it is defective and replacement is required.
An unusually high current draw and low free turning speed typically indicate a shorted armature, grounded armature or field coils, or excessive friction within the starter itself (dirty, worn or binding bearings or bushings, a bent armature shaft or contact between the armature and field coils). The magnets in permanent magnet starters can sometimes break or separate from the housing and drag against the armature.
A starter that does not turn and draws a high current may have a ground in the terminal or field coils, or a frozen armature.
Failure to spin and zero current draw indicates an open field circuit, open armature coils, defective brushes or a defective solenoid.
Low free turning speed combined with a low current draw indicates high internal resistance (bad connections, bad brushes, open field coils or armature windings).

The 1st thing i need to do is clarify what you mean by "won't trun over" do you mean the starter motor spins the engine and it will not fire up or that the starter doesn't trun the engine over? If the starter doesn't turn the engine over do you hear a clicking coming from the starter solenoid when this happens? If so replace the starter solenoid the heavy electrical contacts are burned.

look around the bell housing of the transmission. this will be the end of the transmission that connects tho the engine. the starter turns the fly-wheel to start the vehicle.

Without hearing the sound it makes - it's kind of hard to diagnose.

The engine starting process consists of turning the key to start, the starter motor's rotor moving forward to engage the engine's flywheel, and then the starter motor 's "rotor" spinning until you move the key from "start" to "run". You can hear the starter motor spinning - but one usually can't hear the rotor moving forward to engage the flywheel. As a result, you hear the odd spinning sound - which is the starter rotor spinning. The engine never actually turns over because the rotor never engages the fly wheel. If this is the case, then it is very likely that your starter needs to be checked and / or replaced.

Good luck!

Define - It attempts to turn over but won't catch and run ???? When you turn the key to start does the starter engage an spin the engine ? This would be a crank no start condition . If the starter doesn't engage an spin the engine this would be a no crank no start condition . Sorry to ask but i have only been an auto tech for thirty years an have heard a lot of different discriptions for these simple actions . crank no start or no crank no start . Very different diagnostic procedures . So when you turn the key to start , does the starter engage an spin the engine ,but won't start an run ?

Before you start replacing the starter, do some simple troubleshooting so that you don't waste your money. What happens when you try to jump start the car? Have you tried charging the battery to see if it was low? Have you had your alternator checked and made sure it is putting out amperage to the battery?

Start out with the jump start, and make sure you note anything out of the ordinary, like lights on both vehicles bogging down, or that your engine did not turn over.

If the engine did not turn over but you heard the clicking from the starter, then disconnect your serpentine belt and see if you can turn the engine with a large socket wrench. If you can, then it is could be your starter. If you can't turn your engine by hand then the problem is intenal to your engine and not in the starter system.