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Thread: Bumper shock?

  1. #1

    Default Bumper shock?

    What’s inside bumper shocks want to powder coat them

  2. #2
    Beater gonna beat sly's Avatar
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    I think a large spring It shouldn't have any energy when those are pulled apart. Either that or it's more a sealed nitrogen style shock. I've never managed to disassemble one yet, but I've heard stories about bumper shooting off when the car is on fire, so I'm leaking towards the gas piston idea.

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  3. #3
    GMN Regular WagonMan's Avatar
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    No gas in your shock Jack. It has some sort of membrane that holds the shock extended. Once the membrane is pushed in, the shock is basically toast. I have pulled some out and they stayed out, and some are loose and won't stay out. WagonMan
    89 Colony Park
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    The Brown Blob 87gtVIC's Avatar
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    What is the membrane made of? It has got to withstand around 450 degrees!
    ~David~

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  5. #5

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    Thanks for info

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    GMN Regular slack's Avatar
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    Quote Originally Posted by WagonMan View Post
    No gas in your shock Jack. It has some sort of membrane that holds the shock extended. Once the membrane is pushed in, the shock is basically toast. I have pulled some out and they stayed out, and some are loose and won't stay out. WagonMan
    The one you knocked back out on my car stayed out until the car was disassembled. I'm pretty sure I still have it floating around somewhere in the garage. I suppose if they're loose after, you could always hit it with small a weld or something to hold it in place.


    '78 LTD | '87 Grand Marquis | '89 Crown Vic (RIP) | '91 Grand Marquis (RIP) | '94 Town Car (RIP) | '97 Town Car (RIP)

  7. #7
    P31 Pursuit Car Brown_Muscle's Avatar
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    Quote Originally Posted by 87gtVIC View Post
    What is the membrane made of? It has got to withstand around 450 degrees!
    450 degrees??
    -Phil



    +1982 Ford LTD-S Police Car. Built 351w, Trickflow 11R 190 Heads, Holley Sniper EFI, RPM Intake+ Hyperspark dizzy, WR-AOD, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, HPP Steering Box.

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  8. #8
    GMN Regular WagonMan's Avatar
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    I don't know what the membrane is made of, possibly plastic? I guess 450 degrees is what you have to bake the powder coated parts at? WagonMan
    89 Colony Park
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  9. #9
    The Brown Blob 87gtVIC's Avatar
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    Quote Originally Posted by Brown_Muscle View Post
    450 degrees??
    Quote Originally Posted by WagonMan View Post
    I don't know what the membrane is made of, possibly plastic? I guess 450 degrees is what you have to bake the powder coated parts at? WagonMan
    Yes. More often then not around 450 till flow out then back down to 400 for ~20 minutes. Depends on manufactures directions of powder.

    Doesnt hurt outgassing the part at that temp for ~30 minutes just to be sure all oils are baked out of it before you start the powder coating process.
    ~David~

    My 1987 Crown Victoria Coupe: The Brown Blob
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    Quote Originally Posted by ootdega View Post
    My life is a long series of "nevermind" and "I guess not."
    Quote Originally Posted by DerekTheGreat View Post
    But, that's just coming from me, this site's biggest pessimist. Best of luck

  10. #10
    Beater gonna beat sly's Avatar
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    I need to look when I get home, I may have some sacrificial bumper mounts we can dissect to find out. They would be the old ones from my 93's previous front bumper.

    Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
    rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
    Quote Originally Posted by gadget73
    ... and it should all work like magic and unicorns and stuff.
    Quote Originally Posted by dmccaig
    Overhead, some poor bastards are flying in airplanes.

  11. #11

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    My recently acquired '88 Colony Park has a squished in front bumper on one side. From reading this, I should be able to just pull it out and use something to just fix that now-ruined shock in place? Do they sell replacements anywhere?

  12. #12
    GMN Regular WagonMan's Avatar
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    I used 6 x 6 x 15" block of wood to bang out SLACK'S front bumper. It popped out far enough to look good. Once in a while NOS ones pop up on E-bay. They are not all the same! Different lengths and the cylinders are different widths. According to my parts book, 88 does not interchange with any other year. WagonMan
    89 Colony Park
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    70 HEMI Daytona Convertible

  13. #13

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    Quote Originally Posted by WagonMan View Post
    I used 6 x 6 x 15" block of wood to bang out SLACK'S front bumper. It popped out far enough to look good. Once in a while NOS ones pop up on E-bay. They are not all the same! Different lengths and the cylinders are different widths. According to my parts book, 88 does not interchange with any other year. WagonMan
    I like the idea of smacking it out and fixing it back in position. Years ago I owned an e28 BMW 528e with the horrible protruding US bumpers. I drilled holes in the shocks, drained the fluid, pushed the bumpers in and threw screws in the shocks to hold them in place. Had to modify trim to suit.

  14. #14
    all the CFI are belong to me
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    Late to the party for the "what's inside" topic, but I cut through one (89 Town Car) in the junkyard with a recip saw (a trick I learned from the derby folks) and can tell you it's full of a firm gel. It makes quite the mess when the saw blade shreds it.

    This sharply contrasted against the 76 New Yorker I gave the same treatment to, which was full of bad smelling liquid oil with coil springs.

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  15. #15
    GMN Regular DerekTheGreat's Avatar
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    New Yorker sounds like it had true 5mph bumpers.
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  16. #16
    Wagon Addicted Tiggie's Avatar
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    Quote Originally Posted by pathfinder_88 View Post
    My recently acquired '88 Colony Park has a squished in front bumper on one side. From reading this, I should be able to just pull it out and use something to just fix that now-ruined shock in place? Do they sell replacements anywhere?
    Sometimes the pop out, sometimes not. I did use an 89 on my 88. The diameter of the later one is smaller but you can shim it with some sheet metal and it works fine.
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  17. #17
    GMN Regular DerekTheGreat's Avatar
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    Quote Originally Posted by 87gtVIC View Post
    What is the membrane made of? It has got to withstand around 450 degrees!
    With most powder coat stuff you can get away with 350F if you extend the bake time, 325F even, in some cases.. If the part sees about 17 to 20 minutes at temperature, it's usually good. If looking semi gloss black and want UV resistance, try Akzo-Nobel's QN201U, good stuff right there. But yeah, doubt the membrane can handle anything over 200.
    1985 LTD Crown Victoria - SOLD
    1988 Town Car Signature - Current Party Barge

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