When starting we can hear the starter gear spinning. Makes a whining sound. When bench testing, we get the same whining sound and can see the gear shoot out and turn. We've installed with the original Shim that was there and without. It makes no difference. The motor does not turn. Is the gear not engaging the flywheel? How do we correct? More shims???
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Re: Installed a rebuilt starter in a Camaro.
Shims, are to space the starter drive gear away from the flywheel. The shim is inserted between the engine block, and the starter. The thicker the shim, the more the starter drive gear is further away from the flywheel.
Starter housings are machined from the factory, where they were made. No two housings come out the same, for the machined pad, where the starter bolts to the engine block. The difference is minimal, granted, but thousandths of an inch count in this area.
It's generally a trial an error situation. This is why there are shim packs. Packs of shims with varying thicknesses. Rule of Thumb, is generally that the starter drive gear, is 3/32nd's of an inch away from the flywheel. If you hear a metallic grinding kind of sound, the starter is too close. A thicker shim is needed.
I suspect your problem is the starter drive itself. Definitely sounds like it from your description. Granted, when bench testing the starter drive kicks out, but the roller clutch inside the Bendix drive is no good. (Starter drive) Suggest you take the starter back, and get an exchange.
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If your sure bench test was good and bend ex is not sticking, assuming it is your starter I would say your flywheel ring gear is missing or worn teeth. try rotating engine by hand a quarter revaluation and trying starter again. Bendix Gear sticking
Is the engine turning over with the key in the start position? If the engine is not spinning over and you hear a whining noise, the starter is not engaging the flywheel. If the engine is turning over with the starter engaged, the engine has most likely jumped time that creates low or no compression which results in the whining noise.
Does the engine crank at all ? The low whine could be the starter turning but not engaging the flywheel. The clunk could be when the bendix gear on the starter makes contact with the flywheel. If the starter does not have enough voltage, the solenoid or bendix may not engage. Even tho you replaced both the starter and battery, there could be a problem with the cables or the ground connection.
Hi, It is the starter. The starter has 2 functions. 1 to push out the running gear and the other is to turn the gear(s). What you hear is the motor spinning the gear but it does not push out. So you will have to remove the starter and have it bench tested to make sure. Then take it to an auto parts store and get a new one.Good luck.
Sounds like a bad starter drive gear. The gear has a one way clutch so that it does not over-spin when the engine starts. When the clutch is bad it slips in both directions. Rebuilt starters can be anything from excellent to bone-yard fresh junk, depending on the remanufacturer. You should be able to get just the starter drive and install it; but buy from a reputable parts store, not a bargain center like Auto Zone etc.
It is possible the solenoid is not pulling the armature forward engaging the starter motor with the flywheel/flexplate it is also possible the gear on the starter is loose or broken. Either way remove starte and bench test applying voltage to battery terminal and ground to case. Apply burst of voltage to the solenoid terminal ( smaller one) if armature extends and gear spins, also if gear teeth are good and gear does spin without resistance than the start is good and you should look for possible mechanical failure in the engine, though not likely.
Your starter has a solenoid that throws the gear on the starter motor into the flywheel to turn the motor over.The small gear is either sticking on the starter shaft or the solenoid is not pushing the gear into the flywheel . You will have to take the starter motor off and bench test it to see what the problem is. It is typically cheaper to buy a rebuilt starter at the local auto store and just replace the starter assembly if it has high miles on it. Be sure to bench test your new starter to make sure it is working correctly before installation.
Do you hear a click or any noise at all when you turn the key to try to start it? It sounds like the starter could have gone bad. It should be just 2 big bolts but the starter is pretty solid so it could be heavy. It's a Jeep so you should have good clearance checking it out. The only way to be sure is to pull the starter and bench test it. Or you could just take it to a local auto parts store like Autozone or Advanced Discount Auto Parts, they'll test it for you.
Disconnect the Positive terminal from the battery.
Remove the 2 starter mounting bolts.
***You may need to disconnect the wires at the starter before removing the starter; however, on some starters this is not possible until AFTER you have unbolted the starter, and are able to move it around to access the electrical connections.
When you have removed the starter, jump it off after you have secured it in a bench vise or other means (there is a LOT of torque when these work), and you'll see if it performs as it should.
2 things happen when your starter is cranked:
1-the "bendix" will shoot out the spinning gear so it can engage your flywheel teeth,
and 2- the spinning gear will begin spinning very rapidly to turn your flywheel so the engine begins turning.
If either one of these actions do not occur, your starter will not crank your engine, although you would probably hear a noise of some kind. Other times you will smell electrical windings heating up, or a combination of any of these.Then again, sometimes starters just go bad and will not make any noise.
If you meant that the starter makes a high-pitched whine but does not turn the engine, that starter is bad. More specifically, its drive (the "Bendix") is bad.
If the starter makes a screeching noise as it turns the engine, like it is working too hard and is irritated about the situation, you need to shim the starter. There are shims available at the parts store that fit around the mounting bolts, between the starter and the block. They are used to ensure that the starter drive gear teeth are not too close to the ring gear. If they are too close, the starter has to work much harder as it forces the teeth to mesh.
If you meant that the starter makes a whining noise for a short while after you start the engine, don't worry. Many starters do that.
If you meant that the starter makes a loud whine constantly after you have started the engine, it is staying engaged. It is either bad and that is the source of the problem, or there is another problem (like incorrect shimming) that caused it to stay engaged, and it is now bad. The same gear reduction that allows a small electric motor to spin a big heavy engine can work in reverse if the one-way clutch in the starter drive goes bad, and the high speeds that the starter guts would be subjected to if this happened would lead to self-destruction.
You said it's a new start that was tested thoroughly, but just wanted to point out that if the drive
mechanism is damaged or hung up, the motor may spin but not crank
The drive gear should move
out when the starter starts to spin, if it's locked
up or turns freely either way, the drive is bad and needs to be
The other possibility is that the flywheel has some broken or damaged
teeth that are preventing the starter from engaging. It may sound far fetched but there are really only a couple of reasons why the flywheel wouldn't be spinning, as a starter has a LOT of torque and shouldn't have any problem at all moving the flywheel.