Man - this one has me confounded.
The intake manifold studs that I ordered from McMaster Carr won't allow me to mount my PMO manifolds
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Configuration Details
3.2L engine, stock heads - PMO 46MM carb conversion. Purchased 50mm, full threaded studs for the intake since the stock studs were too long / wouldn't allow a barrel nut or regular hex nut to thread on the stud due to interference between the nut and the manifold body.
Stud Length - Nothing Seems to Work
The new studs are shorter than the stock Motronic studs, and fit perfectly on the outside flange of the manifolds stud (~ flush with the nut) - but they still don't leave room to fasten a M8 nut on the inside studs (the stud closest to the case seam) due to interference with the PMO manifolds.
Not sure how I overcome this one - the nut can't be tightened due to interference with the PMO manifold. You would think this is a common problem but I haven't found any threads describing the same problem:
The PMO manifold bulges out from the mount/flange which makes it impossible to tighten a normal/standard M8 nut (13mm bolt pattern nut) due to interference between the nut and the manifold.
I tried one of the original barrel nuts to see it they would work but they are too tall and contact the manifold - they won't go on the stud.
The stud is fully threaded/seated into the head - leaving just enough exposed threads to allow the outside nut to tighten nearly flush with the stud.
If the studs were any shorter (threaded further into the head or a shorter length stud) the nut would not fully thread onto the stud (the stud would only extend half way or less into the nut).
Seems like there is no good option other than seeking a smaller sized nut (ie. M8 that has a 10-11mm hex nut)
What's the deal?
Thanks, Gordo