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New intake nipples, manifold problem

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Posts: 1842
Joined: Fri May 24, 2002 1:00 am
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Location: Mpls. MN.

New intake nipples, manifold problem


Post by Panacea » Sun Apr 15, 2007 4:56 am

I just had the threads re done on my heads to cure a severe leak. Upon reassembly I found the manifold wont fit in-beetween the new nipples. I tryed loosening the base nuts and moving the cylinders and heads back as far as possible with no luck. Has anyone tryed puting the manifold in a lathe to take a bit off the o-ring groove? I'll need about .025-.o30. It's allways something! Mike

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Joined: Mon Aug 26, 2002 9:09 am
Location: Central Illinois

Re: New intake nipples, manifold problem


Post by Cotten » Sun Apr 15, 2007 2:31 pm


Now you know one more reason why gummyworm conversions are so much more trouble (and expense) than they are worth. (The original 'plumber's' design is adjustable.)

Anyone with a lathe can easily trim both of your manifold spigots evenly. Aim for less than a .020" gap on each side. And if the major OD is larger than the nipples', have that cut to equal so the clamps won't want to tweak.

Good luck,


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