how many bolts hold on the bumper? - JeepForum.com

 
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post #1 of 9 Old 05-04-2008, 06:55 AM Thread Starter
Muddeprived
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how many bolts hold on the bumper?

How many bolts hold on the front bumper of a 2001?

Thanks
Chris


2001 XJ Sport 4.5" LA

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post #2 of 9 Old 05-04-2008, 07:48 AM
dandiv
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it should be 6 hexhead bolts holding the mounts onto the unibody, and 4 torx head bolts holding the bumper onto the mount.
if your looking to replace it with a wheelin bumper that wont be enough. your going to want to tie it into your steering box and your frame rails.
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post #3 of 9 Old 05-04-2008, 07:56 AM Thread Starter
Muddeprived
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Quote:
Originally Posted by dandiv View Post
it should be 6 hexhead bolts holding the mounts onto the unibody, and 4 torx head bolts holding the bumper onto the mount.
if your looking to replace it with a wheelin bumper that wont be enough. your going to want to tie it into your steering box and your frame rails.
I needed to know to tell this guy who will be making me a bumper. He wanted to know how many bolts currently hold it and he will triple that. Instead of two brackets, he'll use 6 so it's very strong. I want an indestructable bumper.

2001 XJ Sport 4.5" LA

1999 TJ 2.5L 5spd 2" lift
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post #4 of 9 Old 05-04-2008, 08:28 AM
GP MEHRD
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since hes never seen it before its probably a good idea to take it to him with it off so he can get his measurements. less room for error. not a sermon. just a thought.....
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post #5 of 9 Old 05-04-2008, 08:57 AM
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Have your builder look at this bumper bracket diagram. http://www.twisted-halo.com/digicam/xj/Bumper%20mount.pdf . Some people have said that one of the dimensions is off a little bit but no-one has ever posted which one is off or given any proof. Use the diagram as a starting point. Most of the store bought bumpers use something similar for their mounting brackets.

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post #6 of 9 Old 05-09-2008, 04:06 PM
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post #7 of 9 Old 05-09-2008, 04:19 PM
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Quote:
Originally Posted by Muddeprived View Post
...He wanted to know how many bolts currently hold it and he will triple that. Instead of two brackets, he'll use 6 so it's very strong....
Um, it doesn't really work that way, and if that's really his logic, I think I'd find a different place to build your bumper.

The factory bumper mounts using 3 bolts per side. Most aftermarket bumpers designed for recovery use these 3 points plus at a minimum the big through-frame hole further back. The rear-most bolt goes completely through the frame.



With 1/4" plate for the brackets, this makes for a pretty strong mounting.

I'd also recommend an L-bracket that ties the front two bumper bolts into the front crossmember:



Many newer bumpers also incorporate the steering box bolts on the driver-side to reinforce that mount, which has proven to be a weak spot on XJs that get wheeled a lot. Something like this, which is similar to the link that CJ7-Tim posted:


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post #8 of 9 Old 05-17-2008, 04:13 PM
dandiv
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id like to point out that no matter how well your bumper is mounted up, you have a unibody. im not sure what kind of hit the cherokees unibody can take but i really would trust it too well. pple will say there engineered to be real strong but just one look at that sheet metal will tell you otherwise lol. that was a real bummer for me actually i spent 7 months building a rediculasly tough brush guard but it turns out that i cant even really pop anything with it lol.
im not trying to burst your bubble, i figured id warn you though so you dont try and test your bumper at 25 miles an hour lol
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post #9 of 9 Old 05-17-2008, 05:23 PM
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Quote:
Originally Posted by Muddeprived View Post
Instead of two brackets, he'll use 6 so it's very strong...
Yeah, this doesn't even make sense. Has he ever built anything that will bolt on to an automotive frame before?? Before anybody chimes in, I KNOW it's a unibody. The design hasn't changed since the invention of the auto though.

Last edited by 00BlackdOut; 05-18-2008 at 08:10 AM.
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