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Oil dipstick bolt size

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Old Dec 5, 2011 | 12:34 AM
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Default Oil dipstick bolt size

I need to know the bolt size and thread pitch for the bolt that holds the dipstick in where the header bolts are. I thought it was a M10 but its too big for it. If anyone knows please let me know

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Old Dec 5, 2011 | 11:12 AM
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Anyone?? Did I put this is the wrong section by any chance? I need to find out ASAP

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Old Dec 5, 2011 | 12:38 PM
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Should be M10x2.0
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Old Dec 5, 2011 | 02:31 PM
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I tried a M10 and it seemed to big for the heads. It looks to be the size of a header bolt but i cant even remember the size of that at the moment.
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Old Dec 5, 2011 | 06:14 PM
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Header bolt is an m8 for sure, and I BELIEVE a 1.25 pitch.

Problem I had at the hardware stores was the bolt head itself. When I installed my LT's I found out I was missing a manifold bolt completely, and that the dipstick tube bolt wouldn't fit.

The header bolt is a m8x1.25 and a 30 length, but if you notice on the factory pieces at the tip of the bolt, the first 5 mm of thread is bare. A 30 is too long, and you'll need a 25.

For the dipstick tube bolt, instead of messing with it all over again, I just ground down the built-in flange on the bolt head itself and it worked like a charm.

I'm guessing you lost your though, so this doesn't help at all, huh?
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Old Dec 5, 2011 | 06:17 PM
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I never got one with the motor when I got it. I got a few bolts kickin around the garage so I guess i will see if one fits but I still would rather know the right one eventually. I will try and M10 again too
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Old Dec 5, 2011 | 07:27 PM
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GM parts book says M10 x 1.5 x 25 pointed
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Old Dec 6, 2011 | 12:07 PM
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By 1.5 it is then. I knew I'd screw it up somewhere.

The hardware stores have them, but the bolt head itself is bigger, that was my problem.

I would just post a wanted ad in the sale section and get a factory piece.
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Old Dec 6, 2011 | 01:02 PM
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I will try the M10 again when I go work on it again wednesday. I forgot to mention I have patriot heads so that might be the issue to it not working to.
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