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LS3 - thread pitch for holes on front/back of head?

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LS3 - thread pitch for holes on front/back of head?

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Aug 9, 2012 | 11:09 PM

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LS3 - thread pitch for holes on front/back of head?

On an LS3 525 crate engine (L92 heads I think) does anybody know what thread pitch the holes are on the front and back of the heads (where you bolt accessories, etc...) to?

3/8 course thread fits but I get some resistance after several turns .... I don't have any metric bolts to test with.

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Aug 10, 2012 | 05:52 PM

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M10x1.5 for them incase anybody ever needs it.

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Aug 16, 2012 | 08:36 AM

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Quote:

Originally Posted by 2efnfast

On an LS3 525 crate engine (L92 heads I think) does anybody know what thread pitch the holes are on the front and back of the heads (where you bolt accessories, etc...) to?

3/8 course thread fits but I get some resistance after several turns .... I don't have any metric bolts to test with.

Quote:

Originally Posted by 2efnfast

M10x1.5 for them incase anybody ever needs it.

Every fastener is metric on these engines.

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525, bolt, crate, engine, front, head, heads, holes, l92, ls1, ls3, side, size, thread, threads

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