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Could you take a coupling nut (long nut with threads thru all) and turn the 82° on the leading edge to match the plenum?
The stud would extend past the other end of the coupling nut and give you the needed stud.
If the coupling nut was long enough you might be able to make two nuts from one coupling nut by turning both ends and then cutting in the middle?
Just a thought.
Looks like the metric flat heads are 90 degree. You can figure 1.5 the diameter for the required thread engagement, plus the thickness of what you are holding down.
M6?....that seems small to me, but then again, it's been a long time since I've been that far in to the valley.
Looks like the metric flat heads are 90 degree. You can figure 1.5 the diameter for the required thread engagement, plus the thickness of what you are holding down.
M6?....that seems small to me, but then again, it's been a long time since I've been that far in to the valley.
Thats what I thought but that’s what I found online, all we need to know is the bolt size cause all FHS in one bolt size use the same head.
I'm not sure I am following this correctly or if I am missing something, however the tapered (3) washers came in my kit from Riffraff that I just installed. I used the bolts that came with the kit. You can buy studs, Put the tapered washer and nut on and you now have a stud.
1. The GPCM (Excursions only) mounting bracket needed studs, too. Otherwise it would have been directly against the plenum. If ever removing the bracket...say to service the HPOP fitting on the head side for example...you would have to remove the bolts that hold the plenum seal.
Here's a pic of that from the RRD install instructions (I haven't checked, but Clay said he was going to update them to remove this step as the kits don't have the parts any more)
2. I used double-nuts to make my threads into studs (jam nuts). So on my studs, the order goes Head, Plenum, tapered washer, washer, two opposing nuts (so I can tighten the stud using the top nut without holding the threads = good and solid with a fixed length of stud into the head), mounting bracket of whatever, washer, nut.
I hope this makes better sense.
Bottom line, once I put the intake plenums on, I am not planning on ever removing their sealing bolts. It's likely I'll have to remove AIH solenoid or GPCM bracket at some point. (I think I am going to remove AIH solenoid altogether soon).
Sure, it was a royal PIA and unwelcomed surprise while attempting to reassemble, but this is why we share our builds with so many pics. I benefit constantly from the experiences of those who have gone before and been so kind as to document and share their ups and downs.
Every once in a while it even leads to improvements in the products our vendors carry, too
This post quotes Riff Raff Diesel install instructions. It says M8x1.25 hardware. So I assumed M8. Unless it changed somewhere along the line.
Yes, McMetric Flatheads are 90°. I missed that in my earlier post about coupling nuts.
