bumper sink in

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bumper sink in

Post by BlackChevelleSS on Mon Sep 22, 2008 7:57 pm

well trying to sink in the bumper on the malibu and I drilled holes in the shocks but they wont compress...Is there a spring or something in there? Im thinking of pulling the shocks off and cutting all thats behind the mounting plate off then compress and weld....Also removed the inner bumper structure for some weight loss.

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Re: bumper sink in

Post by Hydro King on Tue Sep 23, 2008 10:31 am

What are you going to do about a front end collision, those shocks are all you have in case of impact. I have seen others f@#k with the bumper and thought it was a jeopardizing my life is not worth it.
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Re: bumper sink in

Post by BlackChevelleSS on Tue Sep 23, 2008 11:02 am

dont plan on hitting anything... Wink

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Re: bumper sink in

Post by Hydro King on Tue Sep 23, 2008 11:07 am

I dont either, but sh@t happens. That is why i have not gone with fiberglass doors or a fiberglass front end, re think the bumper.
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Re: bumper sink in

Post by Oidar on Tue Sep 23, 2008 2:01 pm

I think where he's driving, there's nothing in front of him to hit but the finish line. Wink
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Re: bumper sink in

Post by Limey SE on Tue Sep 23, 2008 8:06 pm

your lucky you didnt go boom that is compressed gas in there not shocks, read the warning label before applying heat to that bumper shock.

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Re: bumper sink in

Post by BlackChevelleSS on Tue Sep 23, 2008 11:08 pm

its oil not gas...The warning label dont scare me with just drilling holes. anyways I tried to light it on fire, Its not flammable (I like lighting stuff on fire Very Happy ) But if it gets hot it expands and can explode the shocks

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Re: bumper sink in

Post by Hydro King on Tue Sep 23, 2008 11:11 pm

I had to wet coat mine. Powder coating was out of the question.
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Re: bumper sink in

Post by Hydro King on Tue Sep 23, 2008 11:16 pm

I would have just fabricated up a bracket instead of ruining those shock's.
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Re: bumper sink in

Post by BlackChevelleSS on Mon Sep 29, 2008 8:32 pm

well we got the bumper sunk in without any fabrication we just used the factory brackets and didnt even mess with the shocks and it turned out great. I dont have pics of all what we did but I could type it up if anyones interested.






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Re: bumper sink in

Post by Hydro King on Mon Sep 29, 2008 9:56 pm

Man right on, it looks damn good! cheers
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Re: bumper sink in

Post by BlackChevelleSS on Mon Sep 29, 2008 10:57 pm

turned out great and the car looks so much better. I cant believe it fit right up there so well with just some measuring and a jack using the factory brackets.

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Re: bumper sink in

Post by Hydro King on Tue Sep 30, 2008 10:26 am

Nice, bro.
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Re: bumper sink in

Post by Limey SE on Tue Sep 30, 2008 2:23 pm

yea i never would have thought not to use the shocks at all .....DUH .......looks good man

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Re: bumper sink in

Post by BlackChevelleSS on Tue Sep 30, 2008 2:27 pm

It still has the factory shocks in working order, just if they do compress its gonna do some damage now which sucks

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Re: bumper sink in

Post by jonny o on Tue Sep 30, 2008 2:45 pm

I have a little different set-up in my 76 that I'll be tackling this winter.
Looks great man, I think all of our years could use a diet and a sink in!

So, it sounds like you mounted the factory shocks farther back on the frame?

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Re: bumper sink in

Post by BlackChevelleSS on Tue Sep 30, 2008 3:45 pm

shocks are mounted in factory locations, its the bumper brackets them selves that are removed and/or rearranged. Its kinda scary all the support that has been removed and all the left over bolts that were laying around. But the bumper is strong and sturdy enough to hold me and I weigh 220lbs, which granted isnt the same as a 4000lbs car hitting something solid at anything above 5mph

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Re: bumper sink in

Post by jonny o on Tue Sep 30, 2008 4:18 pm

I think I'm with you now.

As far as safety, think about it in 2 seperate ways: All the bumper supports, liner and bracing would probably absorb the impact of a collision and keep the body fairly untouched.

Now, you may get through the skin and into the body on the same impact with it all removed.

Fact is, there is still plenty of car up there to protect the most important thing (your greezy mug) from damage.

All you did was update you ride. Now, vehicles are designed to crumple and absorb the impact, not "thud" through it. You just brought yourself into the correct century!

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Re: bumper sink in

Post by novaderrik on Sat Oct 04, 2008 4:38 am

Hydro King wrote:What are you going to do about a front end collision, those shocks are all you have in case of impact. I have seen others f@#k with the bumper and thought it was a jeopardizing my life is not worth it.
the only purpose of those shocks is to prevent the car from sustaining too much damage in a low speed collision- like, say, bumping into the bumper of another car pulling into a parking spot.
in a collision at any sort of speed, they won't do very much to save your life or keep your car from getting damaged.
i cut most of the bracing out from behind the front bumper of my car- i left just enough to mount the bumper to the car. i think i took close to 50 pounds off the nose by doing that, i know the floor jack slid under the crossmember easier, so it must have lifted the nose 1/2" or more.
my next project is going to be to get rid of the bumper shocks and bumper fillers altogether to shed more weight and suck the bumper in tighter. i already ditched the fugly black rubber strip and "push bars" and made some cool inserts for the openings in the bumper out of some perforated 20 gauge steel i got from work.

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Re: bumper sink in

Post by Hydro King on Sat Oct 04, 2008 11:19 am

The only modifications to the bumper were filling in the jack holes/slots in the bumper(s). I did not have any rubber crap on my bumper's thank god, I always hated that rubber bumper crap.

The 73 bumper is unique due to the filler spot being behind the license plate under the bumper like the old chevelle's prior to 74-77. I could not jeopardize looks for safety. They don't make bumper's like that no more, the 74-77 bumpers got thinner and thinner on the steel thickness.
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Re: bumper sink in

Post by JB2wheeler on Sat Oct 04, 2008 8:38 pm

Hydro King wrote: the 74-77 bumpers got thinner and thinner on the steel thickness.
You can say that again, the front bumper on my 74 Elky is sharp as a razor blasde on the bottom edges and I have been slightly cut many times working on the car. It is not the original bumper, the bumper was replaced in 1974 because o a fender bender. JB
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Re: bumper sink in

Post by coreys73chevelle on Mon Oct 06, 2008 4:52 pm

i think i want to do this too. looks really good.
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Re: bumper sink in

Post by coreys73chevelle on Mon Oct 06, 2008 4:56 pm

id like some more info please! so what did you do, take off the plasic filler and...?
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Re: bumper sink in

Post by BlackChevelleSS on Mon Oct 06, 2008 6:12 pm

well, I hope you got a good air compressor and impact cause it sucks if ya dont.
heres what I did.
1. Remove the 8 bolts (4 on each side of car, 2 on each side of bracket) that hold the bumper to the shocks, if you can remove the 2 larger bolts, itd be easier, but I couldnt get them out with the filler installed

2. Remove everything attached to the bumper...brackets and all except you can leave the parking lights. make sure that you note where they all went

3. After removing the 20 thousand bolts across the bumper reinstall all of the chrome plated head bolts with some oil or anti-seize so it makes them easier to install and remove later on. So now all thats on the bumper is those bolts and the parking lights

4. Now I hope you noted where the brackets were located. Take the inside brackets that held the bumper to the shocks, swap sides and turn them inside out so they protrude inside the bumper, leave the attaching bolts loose.

5. Now install the bumper back on the shocks with those brackets and leave those bolts loose.

6. The fun part...now to get the bumper lined up. Itll move up and down and side to side. So get it lined up how to want to and tighten all the bolts.


There hope that helps. Dont think I left anything out. If you have questions ill be as much help as I can with answering them. If you like, take pictures as you do each step and post them up for others to follow. You have a big pile of brackets and bolts left over which is alot of weight loss.


Last edited by BlackChevelleSS on Mon Oct 13, 2008 1:38 pm; edited 1 time in total

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Re: bumper sink in

Post by Hydro King on Mon Oct 06, 2008 9:58 pm

post pics step by step, and what are you going to do about the back bumper?
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