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Body Mount Retainers

This thread is what I needed to find. I bought the Energy Suspension bushing kit 3.4136R for my 1996 Caprice. What disappointed me was that it doesn't come with any hardware other than a about 12 large washers. No bolts, no nuts, and especially no retainers that are used at the radiator core support.

The picture that I have included is a retainer that is similar to what was in my 96 Caprice. I assume that all of our cars are similar in how the bushing set up is at the very front mount for the radiator core support. The part numbers in the photo are for parts for some Jeep. They are the closest thing that I can find to replace my rotted retainers. Using the same dimension indicators, the badly rusted retainer for my 96 Caprice was:

A = 2 1/2"
B = 1 5/8"
C = 13/16"
D = 5/8"

If anyone knows if anyone makes a direct replacement for these retainers, please let me know. If anyone has a donor car from the South or Southwest that isn't rotted, and you still have these retainers, please let me know.

It's disappointing that replacement parts are available for the bushings but not the hardware.

Thanks!
 

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I was researching for the Mueller mod before I found out my car already had this mod. Anywho, I found Kirban Performance - Buick Grand National Parts, T-Type, Turbo T, GNX Parts, Chevrolet Chevy Corvette Parts, Ford Mustang Parts, Pontiac GTO Parts www.kirbanperformance.com sells bushing replacements for part #457915.....their part number is 7306 (4 piece) and 7307 (6 piece). Figured I'd put this out there in case anyone needs them.
I got the 6 pack. they look different than the stockers and they aren't as thick as pinks. They don't have the inner cavity to accomodate the cushion above that pokes down through the frame. I bolted them in and they work really great on my B4U.
 

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I got the 6 pack. they look different than the stockers and they aren't as thick as pinks. They don't have the inner cavity to accomodate the cushion above that pokes down through the frame. I bolted them in and they work really great on my B4U.
Getting ready to do these on my ride. Do you happen to know the bolt thread size, pitch & bolt length? Also, were they flange head bolts?

Thx.
 

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Getting ready to do these on my ride. Do you happen to know the bolt thread size, pitch & bolt length? Also, were they flange head bolts?

Thx.
From a post in this thread - see if good for your needs:

http://www.impalassforum.com/vBulletin/17-suspension/228460-body-mounting-system-repost.html

My new '96 FWB may have only 60,XXX, but still checking for any needing replacement - especially the #1s.
I checked with my Chevy parts guy and he can't pull up a listing for either bolt. So for now, I can not verify without putting my hands on one as to what the thread size & pitch is. Fred Keihl seems to think they are most likely 7/16-14, flange head bolts.

The only information I could gather is what Bill had previously written:

1. 3528567 - (65mm long / 2.55" rounded off to closest ANSI length 2.50")
2. 3524497 - (85mm long / 3.35" rounded off to closest ANSI length 3.375")

As I find out more info, I'll update the thread, as I imagine getting replacements will be cheaper than the SUMMIT HDW KIT
 

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Sure the GM #'s will be pretty much dead by now.

From Post 19 here:
http://www.impalassforum.com/vBulletin/17-suspension/258114-body-bushing-bolts.html

(10) 3524497 BOLT BODY,(POSN #1,2,4,6,7),(M10X1.5X85,47.7 THD,21.5 OD)
(2) 3
528567 BOLT BODY,(POSN #3),(M10X1.5X65,40THD)

All flange-headed.It appears for 9C1s the 65mm turn into 55mm.

Some ref to the rad supports being 110mm. But will check all that once I get under it.
 

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Since I'm close to this and I have my rad support out I measured the mounting bolts. Mine measured just under 3/4 inch or 95MM.(9C1) I have found this though and wonder about the difference in them and which one would be best. https://www.fastenal.com/products?r=~|categoryl1:"600000 Fasteners"|~ ~|categoryl2:"600001 Bolts"|~ ~|categoryl3:"600015 Flange Bolts"|~ ~|sattr01:^Metric$|~ ~|sattr03:^55mm$|~ ~|sattr03:^90mm$|~ ~|sattr05:^"Class 10.9"$|~ On another thought. Couldn't we use an SAE thread/length grade 8? If need be that is.
Mark: Snowman-33
Sorry. The link is not clickable but try Fastenal
 

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Thx 96 Black for the reference info. I didn't find it yesterday when I went looking at lunch time. I've listed cross-reference McMaster-Carr hyper links to the equivalent for each, going down 5MM in length for each, as opposed to going up 5.


>>(10) 3524497 BOLT BODY,(POSN #1,2,4,6,7),(M10X1.5X85,47.7 THD,21.5 OD)
https://www.mcmaster.com/#98093a646/=17ni3l7

>>(2) 3528567 BOLT BODY,(POSN #3),(M10X1.5X65,40THD)
https://www.mcmaster.com/#98093a642/=17ni3d1

It appears for 9C1s the 65mm turn into 55mm
https://www.mcmaster.com/#98093a638/=17ni6kx

Some ref to the rad supports being 110mm.
https://www.mcmaster.com/#98093a652/=17ni6xp

Can you also provide the approximate O.D. of the flat washer used?
 

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..... On another thought. Couldn't we use an SAE thread/length grade 8? If need be that is.
Mark: Snowman-33
Sorry. The link is not clickable but try Fastenal
Control C/Control V work fine. Gr8 is not necessary for this shear application, but not illegal either. I didn't think SAE was the same as metric.
 

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Control C/Control V work fine. Gr8 is not necessary for this shear application, but not illegal either. I didn't think SAE was the same as metric.
Yeah. It was a brain fart. I tend to have lots of senior moments. :surprise: I was going on just the radiator support with the nut on it. Forgot about the body bolts. Thanks for the jolt.
Mark: Snowman-33
 

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Well I didn't know (or at least remember) that the rad support used a nut. So we're even.

FTR Perfect Memory = Overrated
 

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Some fresh info on bushings. Just finished replacing left side on the 95 with 9C1 uppers and lowers. Had half a set left over from years ago when Dal S was still working. 9C1 uppers do not need the Mueller lowers. Their stiffer design and the shorter metal insert doesn't require the deep lowers. They barely protrude the frame and the stock 377801 work great.

9C1 uppers gave the left side an initial 3/8" lift. Not much driving these days so will update when get some miles on them.

Availability - nothing from GM available. But currently, only one not available easily without getting a whole kit of wrong ones is #2 - 330986

1, 3 - 348080, is available from a couple manufacturers like Anchor and Westar as a part number 2714. Bonus is they come with the 377801 lowers. I got a dozen from rockauto a couple years back and were around $5 a set.
Classic Industries sell original or original cast with numbers uppers for $15 a piece. They also sell the 377801 lowers at $8 each. Their description of upper and lower is reversed in the listing but parts match the numbers. I bought a bunch of the lowers to match Dal's upper set. And a few uppers to compare to the 2714's, and the originals. All seem to be the same. Certainly in dimensions.

4, 6, 7 - 330942, seller on ebay sells for $30 and change each. Another one sell as pair as radiator support bushings for firebird for $55. They also come with lowers that might be in between the two Mueller recommended. I didn't use the lowers.

5 - 488610, no bottom, is a GN, GNX buick common and seems pretty available from ebay and online as original or repro

2 - 330986, the is the beefiest 9C1 upper. It bigger in diameter then the other 2. Oddly, for a non 9C1 car, 1 and 2 are the same. So my plan is to see which is the stiffest of the two, 348080 and 330942 and use it for #2 and see how it works out.

Driving impressions, much improved. The stiffer bushings make the lower frequency 'thuds' a higher quicker pitch. Feels/sounds crisper. Didn't see as much change on the 91, and why never finished the right side is that it already had the 9C1 versions in a few places. Guess the factory chose to soften up the cars even more for 94, non 9C1 that is.
 

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Small update. Changed out the right side few days ago. Used the 330942 for number 2 position. Worked fine but needed to shave the outside diameter a fraction so it would slip into the frame hole. Basically put a small (1/32") bevel with a straight razor blade. No easy way to measure frame hole diameters. But if some were doing a frame off resto, would be interesting to get that measured.
 
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