Weep Hole Instructions - Mustang Evolution

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Old 11-24-2014, 05:44 PM   #1
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Weep Hole Instructions

I had mentioned this in a previous thread and forgot to upload the instructions I received from Borla as to drilling weep holes in mufflers that do not have them already.

A bit of backstory is I have the ATAKs and they got a considerable amount of water inside the case due to rain/snow and the fact I drive short distances in cold weather.

This started causing a buzzing noise. I called Borla to verify that drilling the weep holes would not void the warranty on them. (Not going to junk $700+ mufflers).

They said it is perfectly fine to drill them so long as I follow their instructions. Keep in mind this is for Borlas but it could be applied to any case muffler.

However, check with the individual manufacturers as to if they void the warranty for it or not.

I have the instructions attached.
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File Type: pdf Drain Hole Instructions.pdf (374.7 KB, 505 views)
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Old 11-24-2014, 08:00 PM   #2
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Awesome. Thanks man.
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Old 11-24-2014, 08:04 PM   #3
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I wonder if there's a reason the hole is installed in the front of the muffler rather than the rear? Will definitely be doing this to my S-Types when I get them.
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Old 11-24-2014, 08:11 PM   #4
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Quote:
Originally Posted by au01st View Post
I wonder if there's a reason the hole is installed in the front of the muffler rather than the rear? Will definitely be doing this to my S-Types when I get them.
I wondered that myself. Seems like it would get clogged easier and my driveway is uphill so one at the rear would help drain it better.

It's possibly due to the baffle placements inside the case that the don't want you accidentally hitting.

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Old 11-24-2014, 08:14 PM   #5
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Quote:
Originally Posted by JoeyM91 View Post
I wondered that myself. Seems like it would get clogged easier and my driveway is uphill so one at the rear would help drain it better.

It's possibly due to the baffle placements inside the case that the don't want you accidentally hitting.

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You might want to back your car in. It's also easier to see when you pull out onto the street.


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Old 11-24-2014, 08:17 PM   #6
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You might want to back your car in. It's also easier to see when you pull out onto the street.


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It's not that steep, it's a neighborhood street so I have good visibility. Was just saying it would drain a bit better at the rear while it sits.

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Old 11-24-2014, 08:18 PM   #7
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Yeah, now that you mention it, I feel like the back would be a better drain point.

I'm going forward a lot longer than in going backwards. Plus crap is getting kicked up towards there.
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Old 11-25-2014, 03:51 PM   #8
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I'm heading out to the garage to do this now. Letcha' know how it goes.
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Old 11-25-2014, 03:52 PM   #9
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Definitely do

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Old 11-25-2014, 05:24 PM   #10
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Well I tried, but in order for me to do this right I'm going to have to take them off the car. I tried with them on and couldn't. Wound up snapping one of my 1/16 bits. That's when I quit and told myself the water wasn't so bad lol.

I am entirely too lazy to take them off to do this.
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Old 11-25-2014, 06:53 PM   #11
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Well I tried, but in order for me to do this right I'm going to have to take them off the car. I tried with them on and couldn't. Wound up snapping one of my 1/16 bits. That's when I quit and told myself the water wasn't so bad lol.

I am entirely too lazy to take them off to do this.
Haha, I could see how it'd be difficult to get back there. I'll probably wait to do mine till I get it on a lift.

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Old 11-25-2014, 09:31 PM   #12
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Haha, I could see how it'd be difficult to get back there. I'll probably wait to do mine till I get it on a lift.

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Lol yeah. Save yourself some curse words and a drill bit and wait until you get it up on a lift. That would make it a million times easier.
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Old 01-10-2015, 10:34 PM   #13
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So just drained my new used S-Types. Hole was pre-drilled, don't know if the previous owner put them in or from the factory. Drained two cups from the driver's side muffler; passenger side was dry.

Yummy!
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