Inlet Exhaust Manifold

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dalgrae
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Inlet Exhaust Manifold

Post by dalgrae »

I need to replace the gasket on my bolted up version of the inlet/exhaust manifold I am willing to bet the 4 off 1/4 bolts bolting it together will all shear off when I try to remove them , what thread form are they I assume UNF as the rest of the engine but I am sure someone will know
bmcecosse
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Re: Inlet Exhaust Manifold

Post by bmcecosse »

If they shear off (and 10/1 they will...) - just drill out and retap and use M8 bolts. Or - get a later/better one piece inlet manifold from a later model.
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dalgrae
Minor Fan
Posts: 250
Joined: Fri Jan 06, 2012 7:48 am
Location: Bristol
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Re: Inlet Exhaust Manifold

Post by dalgrae »

I had a go at removing them last night and managed to eventually get 3 off to unscrew as I had hinted at they turned out to be 1/4 UNF 2 5/8 long so I will drill out the remaining 1 off and retap the same

thanks for the advice
bmcecosse
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Posts: 46561
Joined: Wed Feb 16, 2005 11:24 pm
Location: ML9
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Re: Inlet Exhaust Manifold

Post by bmcecosse »

Oh yes - they are 1/4 UNF - but I'm amazed they came out - you should nip out and buy a Lotto ticket right away - it's obviously your lucky day.....
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