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-   -   Modified the Mopar cross bars (http://www.jeepgarage.org/f176/modified-the-mopar-cross-bars-40124.html)

rangersplash85 04-01-2012 05:27 PM

Modified the Mopar cross bars
 
I had purchased the Mopar cross bars back in the beginning of 2011 as they were the only available option at the time. They have been fantastic in terms of getting the job done but there are three things that I dislike about them: how high they sit on the roof, that they bow upwards in the center, and the all black color. I have yet to figure out a good solution for the height issue but I thought today was a perfect day to tackle the other two dislikes. I stared by removing the cross bars from the Jeep and completely disassembling them. I then took the actual cross bar and bent it until it was flat and not bowed anymore. Then I went over the entire cross bar with gray automotive primer and finished it with Rust Oleam aluminum enamel. Reassembled and reattached and I am quite pleased. They look more akin to the Thule aeroblades now. Sorry for the quality of the pics, my garage lighting leaves much to be desired.

https://lh6.googleusercontent.com/-L...0/_DSC5170.jpg
https://lh5.googleusercontent.com/-G...0/_DSC5168.jpg
https://lh4.googleusercontent.com/-L...0/_DSC5173.jpg
https://lh3.googleusercontent.com/-s...0/_DSC5177.jpg

nonopr01 04-01-2012 07:38 PM

Re: Modified the Mopar cross bars
 
Ok, I guess you dont need to carry anything in those bar. The bow was to compensate for the weight of things on top of it.
Actually the one in the back now has a negative bow on it meaning that it will take less weight now.,

armoredsaint 04-01-2012 08:49 PM

Re: Modified the Mopar cross bars
 
Quote:

Originally Posted by nonopr01 (Post 605261)
Ok, I guess you dont need to carry anything in those bar. The bow was to compensate for the weight of things on top of it.
Actually the one in the back now has a negative bow on it meaning that it will take less weight now.,

+1.

Fail in OP

moosehead 04-01-2012 09:01 PM

Re: Modified the Mopar cross bars
 
The stock setup only holds lightweight loads anyway, and it doesn't truly lock to the Jeep. This mod certainly looks clean and would be fine for skiis, bikes, and basic strap to stuff.

IMO this was one of the few weak spots on the entire rig, one that certainly cost me a few more dollars than the OP's efforts.

rangersplash85 04-02-2012 05:06 AM

Quote:

Originally Posted by nonopr01 (Post 605261)
Ok, I guess you dont need to carry anything in those bar. The bow was to compensate for the weight of things on top of it.
Actually the one in the back now has a negative bow on it meaning that it will take less weight now.,

I considered that going into this project but decided to straighten them and see how they hold up. I figured the entire system can hold 150lbs therefore if it's evenly distributed each bar is holding 75lbs. With the rack off the jeep I added 70lbs to each bar and couldn't measure any deflection in the center. I used about 200lbs of static weight per bar and let it sit until the were almost flat. Both of them have just a slight positive bend that is only noticeable when they a lying on a flat surface. The picture angle is what makes it look like a negative bend. I'm quite confident that they will still hold their rated load and if not then I have a reason to buy an after market rack system. : )

JTP (WI) 04-02-2012 02:21 PM

Re: Modified the Mopar cross bars
 
Quote:

Originally Posted by rangersplash85 (Post 605461)
I figured the entire system can hold 150lbs therefore if it's evenly distributed each bar is holding 75lbs.

Is that how that math should be done (ie. 150 divided by 2 bars = 75 pounds on each bar) or should it go the other way? In other words, is EACH bar capable of holding 150 pounds by itself (ie. 150 x 2 = 300 pounds total)?

The bow certainly is intended to adjust for weight. Just like a flat-bed semi trailer that is bowed upwards when empty but sags to straight when under load.

BlueLodge400 04-03-2012 05:08 PM

Re: Modified the Mopar cross bars
 
It looks really good. This will be a nice weekend project. What products did you use?

I just wish the OEM cross bars did not stick out as much.

As for your garage lighting… On the M6 board there is a very easy and cheap DIY for garage lighting.
http://www.m5board.com/vbulletin/e63-bmw-m6-forum-bmw-m6-convertible-m6board-com/202132-not-enough-light-inside-your-garage.html
(Page 4 has a more detailed DIY and where to order the products online.)

rangersplash85 04-03-2012 06:55 PM

Re: Modified the Mopar cross bars
 
Quote:

Originally Posted by JTP (WI) (Post 605706)
Is that how that math should be done (ie. 150 divided by 2 bars = 75 pounds on each bar) or should it go the other way? In other words, is EACH bar capable of holding 150 pounds by itself (ie. 150 x 2 = 300 pounds total)?

Both the owners manual and the instructions for the cross bars say not too exceed a total of 150 lbs. I understand what the purpose of the bow was, I just felt that it was excessive. On a flat surface mine bowed 1 1/2 inches in the center. They looked ridiculous on top of the Jeep. I flattened them until the bow was more around 1/2". They are fairly sturdy bars and I feel quite confident that they can still hold 150 lbs of cargo.

Quote:

Originally Posted by BlueLodge400 (Post 606454)
It looks really good. This will be a nice weekend project. What products did you use?

I used two coats of Rust Oleum Gray Automotive primer (Rust Oleum #2081830) and two coats of Rust Oleum Aluminum Enamel (Rust Oleum #7515838).


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