Weep Hole On Exhaust

[DANA44]

Kind of funny how a top end after market exhaust manufacture has a product go out the door without something as simple as a weep hole . It’s right up there with the $10 pipe clamps at no charge that are included in a $1300 cat back system sales pitch.

Water vapor is part of the combustion process modern engines are efficient doesn’t take much for the exhaust water vapor to reach dew point at start up and initial run time especially in cooler temps. It hard to rely on warmed up exhaust at it is saturated with water vapor though it above dew point to evaporate condensate. Larger mufflers because of their greater surface will produce more condensate at dew point start up.

Borla does use 300 series stainless that is better than the 400 series that some other brands use. The chromium oxide layer with 300 series that forms as the protection layer is probably best served with a small drain then to act as a container.

Borla you've got the sound, the free clamps how about the weep holes ?

Sponsored

 

[Sasuketr]

Kind of funny how a top end after market exhaust manufacture has a product go out the door without something as simple as a weep hole . It’s right up there with the $10 pipe clamps at no charge that are included in a $1300 cat back system sales pitch.

Water vapor is part of the combustion process modern engines are efficient doesn’t take much for the exhaust water vapor to reach dew point at start up and initial run time especially in cooler temps. It hard to rely on warmed up exhaust at it is saturated with water vapor though it above dew point to evaporate condensate. Larger mufflers because of their greater surface will produce more condensate at dew point start up.

Borla does use 300 series stainless that is better than the 400 series that some other brands use. The chromium oxide layer with 300 series that forms as the protection layer is probably best served with a small drain then to act as a container.

Borla you've got the sound, the free clamps how about the weep holes ?

This is only for the first production models. The new ones do come out with the weep holes from the factory. At the beginning they were busy supplying the demand and running a little late behind the competition. I think its a miss. They just really forgot to put the weep holes on the very first production line. It is still hard to believe with all that engineering, R&D, and QC no body brought it up to attention.

But nothing compares to the QC disaster at Ford's assembly line. Panel gaps, allignment and all goes number 1 on my list. It even affected the resale value of the car. Customer complains and all. Who would buy a used car which looks like it got into accidents due to panel gaps and allignment problems?

 

[sloppymax]

Has anyone attempted this on the MBRP race or street? My Kook's axleback on my 2012 did not have the weep holes. I drilled them about a year after ownership and not a drop of water out of either side.

 

[dsp4848]

Noticed that my Borla Touring/S-Type mufflers don't have weep holes drilled and if i shake the muffler, I can hear water splashing around inside. I ordered these mufflers last year in August. Going to drill weep holes this week and will take pictures to upload.

 

[dsp4848]

Drilled weep holes in my mufflers yesterday according to the instructions posted by Borla in this thread. Had a lot of water come out of the mufflers, especially the drivers side one. The yellow cup (32 ounce size) was on the driver's side and it was almost filled. The passenger side was the other cup (also 32 ounce size) and it was about halfway filled. Today, I couldn't really tell a difference in the tone of the exhaust with the water out, but at least there's not water sloshing around back there anymore.

 

[Jon|3.7]

i bought mine last month didnt know about this ill have to check

 

[Lightning]

If they are the new lot of muffles that have come out recently you should be good

I received my replacement ones last month and holes are pre drilled

 

[racingandfishing]

Hey guys,

When we first designed these Mustang exhaust systems, we did not include weep holes because we hadn't had any problems with water collecting in our mufflers before.[FONT=&quot] [/FONT]That said, we started including weep holes for our 2011-2014 Mustang exhaust systems in 2013 when this water issue came to our attention. Since the 2011-2014 [FONT=&quot]Mustang systems were the first systems [/FONT][FONT=&quot][FONT=&quot]we made[/FONT] that collected water[/FONT], we did not anticipate the 2015-2016 Mustang exhaust systems to have this same issue, but unfortunately they did, so we started including the weep holes on those systems also in late 2015. We also released a "Drain Hole Drilling Instructions" document for anyone who bought a system prior to us including the weep holes from the factory so that anyone could drill the holes themselves. (see photo below)
It is very important to note that while water in the mufflers can affect the acoustics/sound, it does not and will not affect the durability or performance of the system.

Please let me know if you guys have any more questions and feel free to call us at 1-877-462-6752 (Monday-Friday 7:30am-4pm PST).​

I have the Ford Racing Touring by Borla and it does not have the weep holes. Couldn't tell if there was water in them or not though. Does this same issue and recommendation apply to this product as well?

 

[Sasuketr]

I have the Ford Racing Touring by Borla and it does not have the weep holes. Couldn't tell if there was water in them or not though. Does this same issue and recommendation apply to this product as well?

Yes.

Follow the instructions in this thread and get rid off that water sitting in the pipes.

 

[Joe 5.0]

Update!

I checked my Ford Racing by Borla SPORT catback and it did NOT have weep holes.

I made the holes myself with a 1/8" drill bit. Borla reccomends using a 1/16" bit, but I broke two of them since they were too flimsy.

Water came out of both of the mufflers, but not as much as I was expecting.

As for the sound after the water was drained, it only made a slight difference. Oh well, it had to be done!

TIP: If you're doing this at home, jack the car up and take the wheel off. You'll make your life much easier

 

[ScottsGT]

Sounds like a perfect excuse to go buy a right angle drill if you don't already have one.

 

[Evil Minion]

Hm, I'll have to check my Corsa's. Got them over a year ago now, dunno if they have the hole or not.

Sponsored