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360 Exhaust Manifold bolts

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Old 04-18-2004, 09:23 AM
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360 Exhaust Manifold bolts
Are the top holes for the exhaust manifolds threaded? Mine had bolts through the top with nuts on the back. I can't get a tap to run through them either. Thanks
 
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Old 04-18-2004, 09:54 AM
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Originally the head was threaded but the top bolts are very rust prone and sometimes people will drill them out and use a bolt and nut to clamp them together. The actual manifold bolt holes are not threaded.
 
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Old 04-18-2004, 10:25 AM
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They should have been threaded. I believe it's a 3/8" bolt. If they put a smaller bolt all the way through, it may have helped corrode the threads.
 
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