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Washers on starter bolts? Is this OK?

Old 09-08-2020, 08:53 AM
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Default Washers on starter bolts? Is this OK?

Is this an acceptable method for installation of starter bolts? As you can see, the threads sheared off in the block and the rest of the bolt fell out into the bilge.




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Old 09-08-2020, 08:54 AM
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NO
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Old 09-08-2020, 09:14 AM
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No, but it probably didn't cause the failure. Probably just a cheap starter bolt or it was over tightened at one time or it came loose. Most auto parts stores have a nice selection of different length starter bolts. Once you get the threads out of the block.
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Old 09-08-2020, 12:21 PM
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Maybe somebody told the guy 'you need to shim it'. lol
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Old 09-08-2020, 12:44 PM
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Originally Posted by ALL_IN! View Post
Maybe somebody told the guy 'you need to shim it'. lol
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Old 09-08-2020, 01:16 PM
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That was the incorrect length bolt for the starter. The block has a small counterbore where the bolt goes in. The knurled portion of the bolt goes into that counterbore and keeps the starter from moving around. There are three different length bolts for Chevy engines. You have to make sure to use the correct ones. Also if you have the old style starter you need to make sure the brace is on the front.
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Old 09-08-2020, 02:04 PM
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Not Approved. McGyver doesn't even use hardware store zinc washers for his starter bolts.

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Old 09-09-2020, 11:57 PM
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Wait a min..Shouldn't the knurling be worn evenly? Looks like just the top half is worn. This makes me wonder if there was an old bolt broken off deep inside the hole that never was removed and this (correct length?) bolt was loaded up with washers so it wouldn't bottom out. Once you get the current broken bolt out of the block, verify the threads in the block are good all the way up.
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Old 09-10-2020, 07:01 AM
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Originally Posted by zz28zz View Post
Wait a min..Shouldn't the knurling be worn evenly? Looks like just the top half is worn. .
Actually it is probably about right. The knurled portion only goes into the block about 1/4 inch.




Last edited by BillK; 09-10-2020 at 07:31 AM. Reason: Add picture
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Old 09-10-2020, 01:31 PM
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Originally Posted by BillK View Post
Actually it is probably about right. The knurled portion only goes into the block about 1/4 inch.


I don't have a starter handy to take a pic of but here's a pic I found after a brief search, (copied pic from here https://www.hotrodders.com/threads/4...oblems.457586/ )



Half of the knurling is supposed to center the bolt in the counterbore and the other half centers the bolt in the starter correct?
If my theory was correct abt something blocking the lower portion of hole, the portion of the knurling that's supposed to be in the block would be in contact with the starter and the part of the knurling that supposed to be in contact with the starter would be touching nothing. This would allow starter to move around, create a stress point where the failure occurred and explain the wear seen on the knurling, no??
It would be nice to see a pic of the other part of the bolt that stayed in block (as it was found).
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