C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Need some help determing a bolt

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Old Aug 17, 2024 | 10:29 AM
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Default Need some help determing a bolt

1987 Model year, L98, I am missing a bolt from one of the engine accessory brackets, the triangular one that supports the smog pump. There's a bit of a gap behind the bracket, between it and the engine block.

I've attached a couple of pics to illustrate what and where I'm talking about. Power steering pump pulley at the bottom, smog pump pulley at the top of the first pic. Second is a bit more zoomed out. Going to hit up Napa and see if I can't track it down while I run errands, but that's been hit or miss for me in the past.

Not particularly technical, but figured this was better than General Discussion.

Thanks all.



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Old Aug 17, 2024 | 11:55 AM
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Our Napa has a huge book to look up any kind of fastener you would want. it actually has samples of the bolts attached to the page and not just a picture. All that fails remove one of the other boats and take it with you
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Old Aug 17, 2024 | 12:09 PM
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Use something to measure the depth of the bore. The thread will be 3/8-16 likely and a potential length maybe 2 1/2". 3/8-16 flange head should be available locally for sure. Flange head is certainly desired.
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Old Aug 17, 2024 | 01:15 PM
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3/8-16 and 2 1/2" were indeed correct.

Don't have a flange head, they didn't have any, but temporary is better than none. I'll source a flange head at the next stop, I'm sure.

Appreciate te help. Hope to be able to repay how regularly and reliably helpful all of you are at some point.


Last edited by hilflos; Aug 17, 2024 at 01:20 PM.
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