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Odd Bolts in Balance Tube

Richie G
in Carburetor Central

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As I'm working on a 260z engine, I found somebody decided to plug some holes in the balance tube by using two 10mm straight thread cap screws (bolts). The original holes were tapered but they forced metric cap screws into the holes, ruining the threads. Notice they were only able to get the screws in part way. I've attach a photo, I circled the two locations. Without drilling the holes out I was able to thread the holes with a 1/8-27 tapered pipe tap, thus allowing me to use 1/8" plugs. All other plugs I've found seem to be the proper threads.

Jim

WrongPlugs.jpg

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https://www.classiczcars.com/forums/topic/69067-odd-bolts-in-balance-tube/
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