Rear shock mounting and frame interference.

edsnovaBaltimore - BCW 52 MG TD Supporting Member

I set about installing the shocks on my Spyder build today and the rear lower mounts swing too close to the frame tubes to fit a bolt head there. Thy just barely clear without the bolts.

The bolts are M-12s, The holes aren't threaded or anything so coming through from the other side or making a stud would be a project.

So before I start trying stuff I thought I'd ask you Beck/Thunder Ranch owners: what's holding your rear shocks to the lower arm? Is your hub assy and lower shock mount like mine? Pics would be a bonus.

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9/26/195:18 PM

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VSpyder Supporting Merchant

@edsnovaEdsnova

Is the shock bolt hitting the same on both sides or just the one side?

9/26/197:03 PM

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edsnovaBaltimore - BCW 52 MG TD Supporting Member

Same.

9/27/194:31 AM

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LI-Rick

A screw in stud seems easy to me. Hole is already 12mm. M14-2.00 requires a 12.7mm hole to tap, which happens to be 1/2". Drill hole, tap hole. Chuck a piece of 5/8" bar in lathe. Spin big end to 14mm and thread. Spin small end to 12mm and thread 12mm. Install stud with loc-tite. Voila!

9/27/195:25 AM

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LeonChupp

Just off the top of my head....... How about putting a thread repair insert in the casting/forging???? Just sayin'......

9/27/195:33 AM

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LI-Rick

I have used these to repair antique flywheels, and they work great for that. They work just like a VW casesaver.

https://www.ezlok.com/ezlok-insert-329-1212

https://www.ezlok.com/ezlok-insert-329-1208

Personally, I think the stepped stud is the way to go.

9/27/196:21 AM

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aircooled(Bruce) Supporting Member

Doing what Rick said sounds like the best solution. Drill, Tap, Thread, Locktite.....Bruce

9/27/198:30 AM

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barncobob

my 69 BSA has a thread insert in a aluminum head, didnt know it till i pulled the plug and insert out together, cleaned it up, red loctite on thread repair, antiseize on plug..no problems since..

9/27/198:40 AM

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chines1

Plenty of clearance on a Beck, even for a nut with some thread sticking out on that side of the lower mount. I can't imagine that your lower shock mounts were accidentally bent evenly, so my only though is that your chassis builder missed his measurement in that area?
Im with the other guys and would just time sert the lower mount and make it a stud...

9/27/1912:31 PM

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edsnovaBaltimore - BCW 52 MG TD Supporting Member

Welp. A screw-in stud seems a PIA to me, lacking as I do a lathe or any taps or dies of the proper threads and gauge. But it does look like the way forward.

What a weird-ass glitch!

I'll see about getting the time-cert and the proper--what is it? 37/64th drill bit. Etc.

Thanks, all.

9/27/194:20 PM

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David Stroud IM Roadster DOttawa Canada '83 IM Soob

edsnova posted:
Welp. A screw-in stud seems a PIA to me, lacking as I do a lathe or any taps or dies of the proper threads and gauge. But it does look like the way forward.
What a weird-ass glitch!
I'll see about getting the time-cert and the proper--what is it? 37/64th drill bit. Etc.
Thanks, all.

You don't have to hand make everything, Ed. You've done lots already. Google screw in stud suppliers. They're out there and may have some in a box ready to ship to you right now.

9/27/194:53 PM

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edsnovaBaltimore - BCW 52 MG TD Supporting Member

So this happened.

That gets it by, both sides clear. I'll either set them in oriented correctly or just grind both bolt heads down by half all around. Solved.

Set both seats in and test-fit myself again. I'm three notches forward on the driver's side so I think the car should work as-is for most guys under 6'2" or so. Mister Torso obviously excepted.