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Old 11-21-2013, 07:07 AM   #1
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Drilling out front upper CA frame side mounts, how?!

Was in the process of installing new upper control arms, when the instructions said I need to drill out the frame side mounts to account for the larger hardware provided. There looks to be maybe 2in clearance before I'm smacking into the engine/trans, and the outer hole is basically against the frame. Am I supposed to drill through the frame to hit these!?

Thanks

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Old 11-21-2013, 07:52 AM   #2
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It makes it an easy process if you buy a long drill bit and simply drill from the outside of the frame rail.

That said, what size bolts are you trying to install? If they're 7/16" like Currie supplies for their arms, you may not need to drill those out. It varies from TJ to TJ, but sometimes the hole is already large enough. On my 98 I needed to drill them larger, however on my 2004 I did not. It's worth checking before going further.

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Old 11-21-2013, 08:06 AM   #3
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Just use the factory hardware.
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Old 11-21-2013, 08:47 AM   #4
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Just use the factory hardware.
This is what I did. The upper CA mount is hardened steel with ribs inside that make it hard to drill out. I gave it a shot, but when the first drill bit snapped, I just put the stock bolt through.
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Old 11-21-2013, 08:49 AM   #5
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This is what I did. The upper CA mount is hardened steel with ribs inside that make it hard to drill out. I gave it a shot, but when the first drill bit snapped, I just put the stock bolt through.
I'm guessing you're talking about the front upper axle side mounts., not the frame side like the OP was asking:

Quote:
Originally Posted by lolitsdaelan View Post
Was in the process of installing new upper control arms, when the instructions said I need to drill out the frame side mounts to account for the larger hardware provided. There looks to be maybe 2in clearance before I'm smacking into the engine/trans, and the outer hole is basically against the frame. Am I supposed to drill through the frame to hit these!?

Thanks
I've never had any issues drilling out the frame side uppers on a TJ, but I could be wrong.
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Old 11-21-2013, 08:52 AM   #6
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Quote:
Originally Posted by geiman View Post
I'm guessing you're talking about the front upper axle side mounts., not the frame side like the OP was asking:



I've never had any issues drilling out the frame side uppers on a TJ, but I could be wrong.
Duh.. my comprehension sucks. Please continue
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Old 11-21-2013, 01:58 PM   #7
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Just use the factory hardware.
That's what I did for the time being, but I couldn't help but feel uneasy, seeing that Metalcloak supplied me with not only new hardware, but larger hardware.

Quote:
Originally Posted by geiman
It makes it an easy process if you buy a long drill bit and simply drill from the outside of the frame rail.
I was pretty sure I couldn't get to the holes from the outside, but maybe I'm mistaken. I'll take another look tonight.
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Old 11-21-2013, 03:57 PM   #8
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That's what I did for the time being, but I couldn't help but feel uneasy, seeing that Metalcloak supplied me with not only new hardware, but larger hardware.



I was pretty sure I couldn't get to the holes from the outside, but maybe I'm mistaken. I'll take another look tonight.
There is a hole in the frame that gives access to the CA mount., but as stated, you will need a long drill bit. I got mine from Home Depot.
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Old 11-21-2013, 05:21 PM   #9
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What's the ID of the Metalcloak bolt sleeve?
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Old 11-21-2013, 08:31 PM   #10
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[QUOTE=lolitsdaelan;6287570]That's what I did for the time being, but I couldn't help but feel uneasy, seeing that Metalcloak supplied me with not only new hardware, but larger hardware.


Double check your hardware. I am in the middle of installing my MC kit and the hardware is the wrong size. They tell you to drill a 7/16" hole, but if you check the CAs take a 1/2" bolt. The ones they supply have a little to much slop for me. The track bars also take 5/8" bolt vice the supplied 1/2" bolt. Check before you drill.

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Old 11-21-2013, 10:36 PM   #11
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The small upper MC bushings should take a 7/16" bolt....that's slightly larger than stock and it's fairly easy to open up the holes to accommodate that size. 1/2" is much larger and I'd be surprised if the sleeve ID was that big. 7/16" for the uppers and 9/16" for the lowers is standard procedure for factory TJ replacement control arms.

If it's really 1/2", I'd have a word with MC.

As for the track bar, I can confirm that the frame side needs to be 5/8".
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Old 11-22-2013, 06:15 AM   #12
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I got caught up yesterday afternoon, I'll hope to have some measurements tonight.
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Old 11-22-2013, 07:57 PM   #13
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The small upper MC bushings should take a 7/16" bolt....that's slightly larger than stock and it's fairly easy to open up the holes to accommodate that size. 1/2" is much larger and I'd be surprised if the sleeve ID was that big. 7/16" for the uppers and 9/16" for the lowers is standard procedure for factory TJ replacement control arms.

If it's really 1/2", I'd have a word with MC.

As for the track bar, I can confirm that the frame side needs to be 5/8".
Unless my drill bit is wrong. The label on the bins where I got the bolts, nuts & washers are wrong. My micrometers are wrong. Believe me when I say they took 1/2" bolts. I send more time running to the hardware store for the correct bolts then I do installing parts..
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Old 11-23-2013, 09:03 AM   #14
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I'm not saying your BS'ing at all.....I'm saying that MC should manufacture the small 2" bushings with a 7/16" center hole, not 1/2".
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Old 11-23-2013, 11:58 AM   #15
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Ok, so I stand corrected on accessing the frame mount. I completely missed the access point.

As for the bolt, I don't have a very sophisticated way of measuring the bolt other than eyeballing the measuring tape, which looks to be at exactly 1/2". I also took a picture of the bolt alongside a 1/2" bit for comparison...



The bolt fits into the bushing without any slop/excessive snugness.

So by the sounds of it, this may be a new thing for Metalcloak?

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