Stripped top starter bolt

Engine, Transmission and related drivetrain.
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VelvetHammer
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Stripped top starter bolt

Post by VelvetHammer » 27 Jan 2019 20:57

Starting to get parts back on the car and found that I must have stripped my top starter bolt years ago.

I'd rather not have to pull my transmission (just got the darn thing in there) to install a Heli-Coil,

Going to find a longer bolt and see if there are some decent threads behind the stripped ones, but failing that, any home-brew methods?

Found this guy's method, looks like it could work. https://www.youtube.com/watch?v=soOvDuwfnQA

The starter is only putting shear force on the bolt so not sure how NASA-level this repair needs to be.

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Chadsinto510s
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Re: Stripped top starter bolt

Post by Chadsinto510s » 28 Jan 2019 08:21

I heli-coiled mine in the car. Not fun but not impossible.

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VelvetHammer
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Re: Stripped top starter bolt

Post by VelvetHammer » 28 Jan 2019 10:53

yeah, I think I'd have to remove my oil filter to make some room. I was also trying to avoid drilling through the metal plate that is sandwiched in-between the block and the transmission.

I did some research and these guys seem to be edging in on the Heli-Coil monopoly. Time-Sert http://www.timesert.com

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cartel
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Re: Stripped top starter bolt

Post by cartel » 02 Feb 2019 09:51

if a tap wont run thru and find enough threads to hold the bolt then i would pull the transmission- it would probably be faster than contorting to do it in the car- and yes you would have to drill the plate out larger in the car by quite a bit .
Mike Gibson
Datsun: 71 dime; 73 Z ; GT3 240
Other: 65 + 67 Mustang ; 03 murcie

datzenmike
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Re: Stripped top starter bolt

Post by datzenmike » 02 Feb 2019 12:49

VelvetHammer wrote:
28 Jan 2019 10:53
I was also trying to avoid drilling through the metal plate that is sandwiched in-between the block and the transmission.
The plate hole is 7/16" the bolt is only 3/8"



The holes are not blind, just drill out the threads enough so you can get a longer bolt through from the other side. Use a nut an washer on the starter. It's not rocket science.

L4W63 is on the left. Starter bolt holes are obvious.

Image
Last edited by datzenmike on 02 Feb 2019 17:49, edited 2 times in total.
"Nissan 'shit the bed' when they made these, plain and simple." McShagger510 on flattop SUs

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zKars
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Re: Stripped top starter bolt

Post by zKars » 02 Feb 2019 16:28

When tapping remember the threads are M10 x 1.5, not the finer 1.25 pitch

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defdes
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Re: Stripped top starter bolt

Post by defdes » 02 Feb 2019 18:22

I have thru-bolted them before with a nut and it works fine.

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