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Post Info TOPIC: F41 front bar, bracket and bushing question


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F41 front bar, bracket and bushing question


I probably already know the answer, but are the B, F41 big front bar brackets the same as the smaller bar?

Yes, all good....If no, does anyone have an old pair of bigger ones?

 

Also, is the bigger bushing a readily available part?

 

Thanks, Mark



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 


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F41 front bar, bracket question


Yes.

Not needed.

Yes and no.

How's that for detailed answers!

So the brackets are the same for either bar according to the parts book and from what I recall when I've put on bigger bars I've never changed brackets.

The bushings are 3943084 from GM, long discontinued. You can find them NOS from time to time but they usually get a good buck. The aftermarket makes the bushing but they don't mold that ridge into the bushing that fits into the groove on the bracket so I suspect they will slowly slide out the side of the bracket. I welded little tabs on the sides of the brackets to prevent that on one of the big bars I installed.

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I bookmarked this biggrin



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The brackets are the same regardless of sway bar diameter. The bushings are different.
Moog K5227 for 13/16" bar - readily available,
Moog K8258 for 15/16" bar - difficult to find, but occasionally pop up on eBay.

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What Clint said.

I did manage to find an NOS Moog 8258 on E Bay $15.00 plus duty and shipping

3 weeks to my door $50.00 Canadian when it was all said and done.

I have a feeling the Moog 5227 ones would work fine????

For the price difference a few miles would likely wear the holes to the bigger size?

Maybe someone here has tried it???



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Moog K5227 won't work with the 15/16" bar, the hole is just too small.

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seventy2plus2 wrote:

The brackets are the same regardless of sway bar diameter. The bushings are different.
Moog K5227 for 13/16" bar - readily available,
Moog K8258 for 15/16" bar - difficult to find, but occasionally pop up on eBay.


 Yes but the outside of them is smooth, missing that molded ridge on the outside that fits in the channel in the bracket . Even the GM originals that include the ridge push out of side of the bracket so I'm betting the smooth ones push out sooner/faster. But it's better than nothing!



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)



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Ok

good input Clint

perhaps try buying the small bushing 

and a  scalpal (farm supply store vet section)

use water for lube

try to open it up

this was my plan then I found the nos pair 



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Thanks guys, very good info. Needed a brain reboot on the subject.

Anyone have a part number for a replacement that would work on the 15/16" bar. Rock auto seems to only have a bushing up to .78 ID

 

On the 67 I just went with A set of Prothane universal greaseable bushings and shells, which required a second hole be drilled either side at the mount. 



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 


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This might solve the bushing movement problem.

https://www.ebay.com/itm/270715414196?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=LRMjuD6oRLe&sssrc=4429486&ssuid=GwM9TiWPQC-&var=&widget_ver=artemis&media=SMS



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Would work, problem being Robert is that the original bracket holes are offset.

 

Carls Idea of welding retainer tabs onto the OEM bracket is a good one. But now who has a 15/16 OEM bushing? Even a china one without the retainer bump.

 

Found these shots on line, a clever fellow simply cut and some 3/16 plate and added them to a straight aftermarket bracket drilling them appropriately offset. I'm not adverse to using greaseable poly in this position.

bracket4.JPG



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cdnpont wrote:

Would work, problem being Robert is that the original bracket holes are offset.

 

Carls Idea of welding retainer tabs onto the OEM bracket is a good one. But now who has a 15/16 OEM bushing? Even a china one without the retainer bump.

 

Found these shots on line, a clever fellow simply cut some 3/16 plate and added them to a straight aftermarket bracket drilling them appropriately offset. I'm not adverse to using greaseable poly in this position.

bracket4.JPG


I forgot that the holes were offset. So much for standardization of the bracket/bushing set up. Changes in parts that could be used across other models, makes no sense to me.confuse



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What about taking one like this one and trimming the edges ?

61PmWvrkHoL._AC_SL1500_.jpg

ACDelco Gold 45G1017 Front Suspension Stabilizer Bar Bushing Kit, Bushings - Amazon Canada



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The say  compatible with the Moog K8258

A0A8E162-CE54-4064-B25A-AECC847ED946.png



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Just keep your eye out for a set of Moog K8258, they pop up on eBay occasionally.

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ABC123 wrote:

What about taking one like this one and trimming the edges ?

 

ACDelco Gold 45G1017 Front Suspension Stabilizer Bar Bushing Kit, Bushings - Amazon Canada


 I think the ID at 1" is too big right? The F41 is 15/16?

10017.JPG



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65 Laurentian post, 67 Grande Parisienne 4 door HT. 
 


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These are the right part number, just not sure they look right?

https://www.ss396.com/part/DMG-657.html



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gtodrive wrote:

These are the right part number, just not sure they look right?

https://www.ss396.com/part/DMG-657.html


You're on to something there.  By clicking on "Vehicle Fitment", it says it's a Moog K8258.

 



-- Edited by seventy2plus2 on Thursday 11th of April 2024 04:11:20 PM

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Still on the hunt, we are now seeing three 63-67 C2 corvette bushings online with that unique ridge. A poly 15/16" listed as a C2 F40 BB part, and the 7/8" and a 3/4".

 

And we see GM listings in the big car MPC for a 3/4 and a 7/8" bar. Described as the hole size in the bushing. Nowhere is a 15/16" bar mentioned in the MPC, in fact I can only find one bar listed?? And the B part numbers don't match the GM vette number so far. 

mpc B.JPEG

 

Is our big F41 bar to be described as 7/8? I realize a 15/16 bar would squeeze into a rubber 7/8 bushing.

 

Now could these C2 parts be close enough? Certainly looks close to the B body part.

Limitless of examples on line for the vette parts,

Search 63-67 Corvette front stabilizer bushing

bb c2.JPG

https://www.corvettecentral.com/c2-63-67/suspension/front-sway-stabilizer-bar/?count=18

 

Typical C2 bracket and bar. while not offset like the B, the shape sure looks close.

v2.JPG



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Those sure do look right and I bet for the 1/16" difference they would likely be fine. 

And yes, the parts books all say 7/8" as far as I've been able to find but we know the bar in real life is 15/16". Odd that they do it that way but it must be a case of one hand not knowing what the other one is doing type of thing. 



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I think I might take a chance on a pair of C2 7/8" bushings. 

But I need to beware, seems there are some of a very tall looking style, and then the ones that look like ours.



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Hey Mark, I have one super big bar here.

1&1/16

I am currently looking for the bushings.

All they did was drill new holes in the frame.

I'm sure you could do better with the drilling biggrin

002a.jpg



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Should have drilled over to the right, not the front. Ugh. Oh well, it's part of the cars history I guess.

Are you staying with that big bar Randy?

I thought you'd want a 15/16"?



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I have no use for the big aftermarket bar.

I am using the original bar on the front of the 2+2.

The big bar I have would tame that convertible down biggrin



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I saw the ridged bushings for the Corvettes and thought the same thing, Mark. But then I noticed the ridge was down the center of the bushing, unlike the angled ridge on the 69 B-body. There are lots of cars that used a bushing with a center ridge including Nova, Camaro, and Firebird. Again, why all the differences in a little bushing?



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