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> CFR Firewall Shifter Bushing, Fasteners
TargaToy
post Oct 30 2024, 04:09 PM
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I'm installing Chris Foley's firewall bushing which is a beautiful design.

Has anybody installed one using fasteners other than the sheet metal screws or pop rivets that came with the kit?

I've been contemplating installing #10-24 riv-nuts after reading someone else's experience with either the screws or the rivets (I can't remember which) working loose over time.

What's your experience?
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Dlee6205
post Oct 30 2024, 04:54 PM
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I've installed a couple so far and always used the rivets... I've never had an issue.

Rivet nuts aren't a bad idea.... I suggest keeping it metric though. (IMG:style_emoticons/default/poke.gif)
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jim_hoyland
post Oct 30 2024, 05:06 PM
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Ric-nuts sound interesting, tell us what you decide. I have the CF bushing but haven’t installed it yet.
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gereed75
post Oct 30 2024, 05:50 PM
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I fabbed a little nut plate to put on the interior side. Was able to install it one man that way. Rib nuts should work also.
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jim_hoyland
post Oct 30 2024, 06:12 PM
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QUOTE(gereed75 @ Oct 30 2024, 04:50 PM) *

I fabbed a little nut plate to put on the interior side. Was able to install it one man that way. Rib nuts should work also.

? How did you get the plate behind the firewall ?
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TargaToy
post Oct 30 2024, 06:49 PM
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QUOTE(Dlee6205 @ Oct 30 2024, 06:54 PM) *

I've installed a couple so far and always used the rivets... I've never had an issue.

Rivet nuts aren't a bad idea.... I suggest keeping it metric though. (IMG:style_emoticons/default/poke.gif)


Please don't think that wasn't my first idea. (IMG:style_emoticons/default/biggrin.gif) The predrilled holes in the bushing housing are smaller than 6mm but fit #10-24 perfectly. I want a little more beef than 5mm bolts. Although I may open the holes up to 6mm before it's all over.

It's hard to buy riv-nuts in small quantities. I can get a 10 pack of them from McMaster-Carr but with shipping, a 10 pack is more than a 100 kit from amazon. And something in me hates buying a bulk of things which may rarely or never be used again.

The nut plate idea is a very good one and I'm going to strongly consider that.

Thanks for the input!
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ChrisFoley
post Oct 31 2024, 06:20 AM
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A friend of mine said he installed one with self tapping screws so he wouldn't have to drill holes first.
A couple of people have told me they had to remove it after installing with rivets, and then had difficulty acquiring 3 more of the 3/16 x 7/8 pop rivets.
One customer mentioned that drilling for the screws had a downside - the small drill bit can go offcenter easily enough that the screws become difficult to install. A simple solution is to wrap the drill bit with tape, but that may come under the heading of an "advanced technique" which bears mention in my installation instructions.

I would consider offering (or including) an alternate/upgraded fastening method if there was some consensus.
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jim_hoyland
post Oct 31 2024, 06:42 AM
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What does a drill bit wrapped in tape look like ? And, how does the tape help ?
I have yet to install mine……
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GregAmy
post Oct 31 2024, 07:36 AM
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I am a massive fan of rivnuts, use them in any application I can, especially if the piece needs occasional removal.

That said, I've been running two of these bearings in my two cars, secured with the supplied rivets, without issue. If I had thought of rivnuts I'd have probably gone that way.

But that piece shoudn't need to be removed, certainly not "occasionally". Having already secured it with the rivets then if I ever have to remove or replace it I can easily replace it with rivnuts using the same drilled holes location.

Chris, I don't think you can change your design to use rivnuts given the installation tools is specialized. Pretty much any garage will have a pop rivet tool, or can get a cheap one from Home Depot. Not so much rivnuts.
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VaccaRabite
post Oct 31 2024, 11:46 AM
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I installed the spherical bushing from Chris in 2016 I think - so about 8 years and many thousands of shifts later...

The pop-rivets are starting to get loose. When freshly installed they were tight - zero play. Now when I'm under the car I can wiggle the housing that holds the ceramic bushing very minutely. It has not made any difference at all in shifting, but the pop-rivets are allowing some movement after a bunch of years in operation.

I have thought about putting rivnuts in there, but won't until there is a damn good reason to unhook the shifter.

BTW - this loosening could very well be rust forming on the firewall, or from just wear and tear on the pop-rivets. I drive the car a lot, and that includes through downpours that always seem to happen when I have the car over 100 miles from home.

Zach
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Flyinlow
post Oct 31 2024, 04:50 PM
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I also used the rivets but used j b weld on back just to keep it there
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gereed75
post Oct 31 2024, 04:58 PM
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QUOTE(jim_hoyland @ Oct 30 2024, 08:12 PM) *

QUOTE(gereed75 @ Oct 30 2024, 04:50 PM) *

I fabbed a little nut plate to put on the interior side. Was able to install it one man that way. Rib nuts should work also.

? How did you get the plate behind the firewall ?


Hmmm. Many moons ago. Don’t remember exactly. Believe it was triangular and made from thin gauge aluminum. Used aviation rivet retained nutplates. jiggered it into the hole, and I used some longish screws to skewer it

Remembering back makes me like the idea of rivnuts even more

Aha…it just came to me - it was circular. Put a cut through it and “spiraled” it in through the hole. Necessity being the mother of invention and all
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FlacaProductions
post Oct 31 2024, 06:05 PM
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QUOTE(Flyinlow @ Oct 31 2024, 03:50 PM) *

I also used the rivets but used j b weld on back just to keep it there

I like this approach.
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