Manifold Bolt Issue

1413 Views 6 Replies 3 Participants Last post by Woody, May 2, 2011

Woody

Discussion Starter · Apr 28, 2011

Resolving several issues with the Spider, including a leak at the manifold / downpipe flange. Took a look, and three of the four bolts were loose.

No worries, my trusty wrench and or ratchet will take care of it...

First bolt, no problem. Tightened up nicely.

Second bolt...problem. The whole post rotates, which I assume isn't supposed to happen, and therefore will not tighten. Has anyone encountered this before? Suggested solutions?

Thanks for your help. Picture attached of offending bolt.

Woody

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Alfisto Steve

· #2 · Apr 28, 2011

One way you can replace the stripped stud in manifold

Since you appear to have access to stripped out stud hole I would remove stud from manifold and get a bolt long enough to go through from the top.

Either use a smaller diameter bolt, washer and nut or drill out hole in manifold slightly so you can drop in same diamter bolt which is 8mm that is long enough to add washer and nut under exhaust pipe flange.

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Woody

Discussion Starter · #3 · Apr 28, 2011

Thanks Steve. Seven minutes for a response...I think it's a record! I was thinking along the same lines. What should the bolt, washer and nut be made of? I've read a lot of positive things about brass nuts, but I'm unsure in this situation.

Thanks again,

Woody

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Alfisto Steve

· #4 · Apr 28, 2011

Woody said:
Thanks Steve. Seven minutes for a response...I think it's a record! I was thinking along the same lines. What should the bolt, washer and nut be made of? I've read a lot of positive things about brass nuts, but I'm unsure in this situation.

Thanks again,

Woody

I would try to get an 8mm bolt grade 8 or better. As for brass nut is your stud has one then you need to see if you can get it off and try to find bolt with same thread pitch (fine 1.00) but chances are you may have to use new nut and bolt with 1.25 thread pitch. The 164 uses steel nuts with medium 1.25 thread pitch.

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Woody

Discussion Starter · #5 · Apr 28, 2011

Thanks Steve. Will update as I progress.

Cheers,

Jeff

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Andrew

· #6 · Apr 28, 2011

Or Helicoil it or other thread repair.
Andrew

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Woody

Discussion Starter · #7 · May 2, 2011

Hi Steve, thought I'd just update. New bolt, slightly smaller in diameter than the original, lock washer, washer and nut...and all is good again in my world. A simple solution. Thanks,

Jeff

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Manifold Bolt Issue

Woody

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