exhaust systems

**jick.cejoco** · May 16th, 2023 05:10 PM

over the years, chrysler, dodge, plymouth and now jeep had little holes drilled on the lower part of the muffler to drain the water byproduct of combustion. fuels which are carbon compounds are burned inside to the engine combining 21 % of the air produce H20 (water), NOx, CO, CO2, O2 and unburnt fuel HC flowing through the exhaust system. all of them are in gaseous form except for water which collect at the bottom inside of the muffler. now, other manufacturers are following suit for the same reason of extending the service life of the muffler. if you don't have a weep hole on the resonator of the muffler, water sits and constantly react with steel. remember, rust never sleeps. if you drill holes, don't be surprised to notice water dripping. the size of the hole can be as small as 1/8 of an inch (could be smaller) without any change in the sound or silence of the tailpipe with the engine running.

**oj88** · May 17th, 2023 10:00 AM

Good to know. I'm not aware if said holes exist in our vehicles. Would be interesting to find out.

**dr. d** · May 17th, 2023 10:34 AM

papayag ba ang emissions testing facility, kung may butas nang ganyan ang ating mga muffler?

**oj88** · May 17th, 2023 10:45 AM

Originally Posted by dr. d

papayag ba ang emissions testing facility, kung may butas nang ganyan ang ating mga muffler?

I don't think they care.

In all the years I've had my vehicles emissions tested, there wasn't a single time they even attempted to inspect any portion of the exhaust system. They just put the probe in and that's that.

**dr. d** · May 17th, 2023 11:00 AM

Originally Posted by oj88

I don't think they care.

In all the years I've had my vehicles emissions tested, there wasn't a single time they even attempted to inspect any portion of the exhaust system. They just put the probe in and that's that.

well,
i'm a law abider...

**Ry_Tower** · May 17th, 2023 11:45 AM

Originally Posted by dr. d

papayag ba ang emissions testing facility, kung may butas nang ganyan ang ating mga muffler?

Yup, hindi naman kasi nila alam yan dahil hindi nachecheck.

**oj88** · May 17th, 2023 02:31 PM

Originally Posted by dr. d

well,
i'm a law abider...

How is it illegal? Especially if it came out like such from the factory?

**jick.cejoco** · May 17th, 2023 07:09 PM

Originally Posted by dr. d

papayag ba ang emissions testing facility, kung may butas nang ganyan ang ating mga muffler?

what do they know, they don't even have or not know how to use a five gas exhaust analyzer. if you ask them why there is water vapor out the exhaust they probably can't explain.

the u.s. epa clean air act uses california specs now. before year 2000, there were california and federal and canada emissions specs.

even then, chrysler cars had weep holes on the mufflers prior to obd1 and now obd2 compliance. so, in that quasi concern if it was legal or not is no doubt not a problem.

**Dr.Kamiya** · May 17th, 2023 11:26 PM

Mustang muffler drain hole

**oj88** · May 18th, 2023 10:05 AM

There are a number of YT videos where people have drilled holes on the lowest part of their muffler, giving the stagnant water a way out. Judging by how much water is coming out, I'd say it can be anywhere from a few hundred milliliters to a liter, maybe more... depending on the size of the muffler.

Notice that if a car in front of you is on an incline, you could see water dripping out the tailpipe. This could mean that his muffler is already likely filled with water and tipping it slightly allowed some of it to spill out.