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Old 06-26-2009, 10:50 PM
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My Starter Keeps Cracking!!!!

Ive gone through 2 starters now. each time the work fine for the first five ignitions. then when i try to turn it on again i hear a harsh screeching grinding sound.

i go under the car only to find my starter is cracked through the front part where the opening is for the flywheel to meat the starter gear.

the nose gray part is all cracked.

this is the second time this happens. the first time the guys at the parts store said it was defective this 2nd one in a row though cant also be defective.

i put all the wire exactly the same and bolted it back on to the car.

i ratcheted the bolts till they wouldnt turn anymore and it was as tight as i could get it.

is that the problem?

the original starter that came with the car had no cracks on it. it just died. now all the new starters are cracking.


i have a concert to go to tomorrow and know this should be an easy fix theoretically.

please help me.

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Old 06-26-2009, 10:57 PM
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how much compression does the engine have??
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Old 06-26-2009, 11:20 PM
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i dont know..

its a 1972 buick skylark 4bbl 350 code J engine.
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Old 06-26-2009, 11:52 PM
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..........
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Old 06-27-2009, 06:03 AM
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Okay, lets go down the list. First off, you are using the correct bolts? They must be starter bolts that have a shoulder and a knurled section. Make sure the starters mounting area is clean. There should be no washers on the bolts, the shoulder of the bolt is designed to fall into the machined grooves of the starter to keep it from moving, when they move is what causes them to break. When you install the new starter and do all the checks I mentioned, torque the bolts to around 40 Ft Lbs. and you should be good to go.
Some years ago I was going through many a starter and this solved my issues. good luck.
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Old 06-27-2009, 09:00 AM
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Did you break a bolt or two on the ring gear? and now you have a wobble to it?
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Old 06-27-2009, 09:12 AM
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Did you use shims? Most motors don't need them, this could be the exception.
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Old 06-27-2009, 10:57 AM
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make sure your timing is right.If it's to far advanced,It will break a starter..
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Old 06-27-2009, 01:18 PM
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Did you verify new starter has same number of teeth as old starter.

Don't get carried away and strip the threads.

If the advance is too much you should have noticed the starter was straining; but it is a good idea to verify timing like New said.

You should verify all teeth on ring gear look normal. Make sure ring gear/fly wheel it firmly attached.
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Old 06-27-2009, 02:41 PM
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If it is the timing.It will spit out the carb,And then break the starter.It breaks when the motor pop's back on you..
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Old 06-28-2009, 12:31 AM
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got another starter today. tried the shims. put two on one side to push the starter gear closer to the flywheel.

have turned the car on and off 8 times today to test it and so far no cracks or screeching.
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Old 06-28-2009, 10:18 AM
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All GM factory starters must have the rear starter mounting bracket/brace installed or the starter nose will break (usually sooner rather than later). The two starter bolts alone on the GM starter nose cone are not enough to support the starter on the motor when cranking.
Use only GM OEM knurled shank starter bolts.
Swap the origional starter nose cone from your old GM starter to the replacement starter.
If you lost the origional OEM installed rear starter mount brace/bracket go to a GM dealer and buy one and install it correctly before trying the starter.
Its only around $10 new. It goes on the end of the starter and bolts to the side of the engine block above the oil pan rail.
Not that hard.
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Old 06-28-2009, 01:54 PM
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Good yada
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