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Old 01-30-2007, 12:44 AM   #1
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Question Help

Does anyone know anybody at Greddy. My exhaust manifold needs replaced.
When installing the turbo to the exhaust manifold 1 of the bolts sheared. My guess at this point is the kit was sent with bolts that were too long. I come to this conclution because I have now, after dissasmeble, installed the bolts and there is more space left between the washer and the turbo manifold.
Anyway I replaced the sheered bolt with a Grade 8 hex head bolt. After 100 miles , that bolt was ripped out and stripped the threads on the exhaust manifold.
I have two choices, Hope Greddy will replace the manifold, or have the stripped hole re threaded. I have someone where I work that can do that,
Any Info is greatly appreciated.
Blade
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Old 01-30-2007, 02:47 AM   #2
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Quote:
Originally Posted by tpe331 View Post
My exhaust manifold needs replaced.
If you can't get it replaced..

http://www.etdracing.com/miata1.html

Good luck.
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Old 01-30-2007, 02:51 AM   #3
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Default Thanks

Thanks for the link. Takes some stress off.
Blade
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Old 01-30-2007, 02:57 AM   #4
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Take it to a local engine rebuilder/machine shop and have him drill and tap them all to 3/8". He'll have to also enlarge the holes on the turbo flange. Buy exhaust studs and use those. You'll likely have to trim the studs down a bit to make everything fit. I'll go take a quick shot of my manifold with turbo installed.

I think 3/8" is about as big as you'll be able to go and still get nuts on the studs.

1) Clearance is pretty tight.
2) 3/8" is significantly larger than 8mm, and easier to source.
3) Swanky wastegate spring with turnbuckle.
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Last edited by jayc72; 01-30-2007 at 03:16 AM.
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Old 01-30-2007, 03:20 AM   #5
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that is EXACTLY what i did. screw those stupid retarded metric size bolts. i went with 3/8" coarse thread best thign i ever did.
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Old 01-30-2007, 08:13 AM   #6
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If coarse thread was the best thing you ever did, imagine what fine thread would've been like!
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Old 01-31-2007, 05:10 AM   #7
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Default Manifold

I went an purchases a heli coli kit at the local car quest . I used the drill press at the airline maint hanger and then tapped the hole. The kit came with a tool to insert the heli coil (new threads). I just used the same M8 x 1.25 because I had already done this b4 reading todays posts. Thx for the help.
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