starter spins but not engaging flywheel - Chevy Nova Forum
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Old 16th-November-2011, 05:38 PM   #1
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starter spins but not engaging flywheel

not sure if this is the correct spot to post this, but heres the story, i have a 406sbc with new ram clutch and a new flywheel which was said to be the correct one for the engine..when i go to turn the ignition, i can hear the starter spinning but not engaging,, i tried 2 starters that i had lying around, and the same problem for both of them,,,could it be the starters are bad, they havent been used in almost 3 years,,,, thanks for any info you guys have
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Old 16th-November-2011, 05:46 PM   #2
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There is a solenoid mounted on the starter that, when energized, engages the rotating gear with the ring on the flywheel. You can bench test this with a 12V battery to make sure this solenoid is working, and the gear is extending/retracting.

If this is working, then you need to check the clearance between the starter and flywheel.
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Old 16th-November-2011, 07:55 PM   #3
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Are the starter and flywheel size matched? There are two sized 153 and 168. I'm not sure how it all works, if the starters are different or the holes are in different places. Did your starter use two long bolts or a long and short?
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Old 16th-November-2011, 08:02 PM   #4
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try rotating the engine by hand a few degrees. its possible it stopped on a spot where theres a couple of damaged flexplate teeth.
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Old 16th-November-2011, 09:35 PM   #5
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try rotating the engine by hand a few degrees. its possible it stopped on a spot where theres a couple of damaged flexplate teeth.
He said it was a new flywheel, so. I'd hope it wouldn't be missing teeth already.
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Old 16th-November-2011, 09:56 PM   #6
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He said it was a new flywheel, so. I'd hope it wouldn't be missing teeth already.
My bad. I have selective reading skills...
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Old 16th-November-2011, 10:37 PM   #7
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I'm pretty sure its a 168 tooth flywheel, I have an 11 inch clutch disc, I tried 2 starters, one used long bolts and the other used short bolts, nothing grinding or getting stuck, when I bolt the starter up, there's a little space between the starter and the block, is this normal or do I have the wrong starter, thanks for the info guys
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Old 16th-November-2011, 10:43 PM   #8
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While the starter is mounted to the block, you can pry the starter pinion gear forward towards the flywheel ring gear to check proper clearance.
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Old 17th-November-2011, 08:09 AM   #9
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There are different nose pieces for the starter motors that allow the basic Delco motor to fit all the variations. Somewhere I have a chart that shows the different types and what they fit. I think the staggered bolt pattern is for the 168 tooth and straight across is for the smaller flywheel.
I've come across rebuilt starters with really poor fitting nose pieces.
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Old 17th-November-2011, 12:57 PM   #10
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Pics??

Most likely but, Do you have the flywheel bolted to the crank the correct way?
Also, what style starters have you been trying?
The staggered bolt type or billet block style?
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Old 17th-November-2011, 01:37 PM   #11
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Quote:
Originally Posted by nick72nova View Post
I'm pretty sure its a 168 tooth flywheel, I have an 11 inch clutch disc, I tried 2 starters, one used long bolts and the other used short bolts, nothing grinding or getting stuck, when I bolt the starter up, there's a little space between the starter and the block, is this normal or do I have the wrong starter, thanks for the info guys
If you have the 11 inch clutch you have the 168 tooth flywheel, no exception.

We are assuming you are using a GM factory starter and not a aftermarket starter.
Need to give complete information.

The GM starter you need will use 2 long bolts. And they will be staggered, I don't believe you can used a starter with bolt straight across because most 400 block are drilled for staggered only.

You should be using the starter pictured on the right.
Left is a 153 tooth right is the stagger 168 tooth aluminum nose starter.
(Note: there is a GM HD cast iron nose starter that has a dual pattern for 168 tooth only, rare)



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Old 17th-November-2011, 02:33 PM   #12
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Quote:
Originally Posted by nick72nova View Post
not sure if this is the correct spot to post this, but heres the story, i have a 406sbc with new ram clutch and a new flywheel which was said to be the correct one for the engine..when i go to turn the ignition, i can hear the starter spinning but not engaging,, i tried 2 starters that i had lying around, and the same problem for both of them,,,could it be the starters are bad, they havent been used in almost 3 years,,,, thanks for any info you guys have
Got the wrong style starter?
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Old 20th-November-2011, 12:26 AM   #13
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Quote:
Originally Posted by The Big Al View Post
If you have the 11 inch clutch you have the 168 tooth flywheel, no exception.

We are assuming you are using a GM factory starter and not a aftermarket starter.
Need to give complete information.

The GM starter you need will use 2 long bolts. And they will be staggered, I don't believe you can used a starter with bolt straight across because most 400 block are drilled for staggered only.

You should be using the starter pictured on the right.
Left is a 153 tooth right is the stagger 168 tooth aluminum nose starter.
(Note: there is a GM HD cast iron nose starter that has a dual pattern for 168 tooth only, rare)



the bolt holes are staggered like the one on the right, i have to check it out tomorow and take pics,,its just a car, ill figure it out lol
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Old 11th-December-2011, 04:49 PM   #14
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ok so i finally made it to my garage and had my friend crank the engine while i was under the car, what i see is the solenoid drive coming out, but it looks like the flywheel is sitting to far away, not sure whats going on here loll, any help would be great again loll
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Old 11th-December-2011, 04:55 PM   #15
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Quote:
Originally Posted by nick72nova View Post
ok so i finally made it to my garage and had my friend crank the engine while i was under the car, what i see is the solenoid drive coming out, but it looks like the flywheel is sitting to far away, not sure whats going on here loll, any help would be great again loll
Try putting the right starter in it ,like the previous posts said........
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