Exhaust Leaking Inside r53
Hello guys.
Since ive decated my r53 i noticed an exhaust smell inside the cabin and it got worst and worst on long drives. Feeling tired and Sleepy. So i went and bought a Carbon Monoxide meter. Sure enough the numbers are spiking. But here’s the problem. It only spikes up when i have the circulating AC button activated. If i turn of off. There’s no exhaust leak inside st all. Zero on the ppm meter. Do i i have an exhaust leak? Or since it’s a hatchback the draft coming in from the trunk bring the exhaust gasses in? Any help or inputs are greatly appreciated. Thank You. Ps. I’m running headers with no cat to Borla exhaust. |
You're smelling what the unfortunate person behind you in traffic gets to smell since you took the cat off. No sympathy from me. Anyway, you have an exhaust leak. For your own health, fix it. For the health of everyone else and the planet, put the cat back on.
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Originally Posted by squawSkiBum
(Post 4477978)
You're smelling what the unfortunate person behind you in traffic gets to smell since you took the cat off. No sympathy from me. Anyway, you have an exhaust leak. For your own health, fix it. For the health of everyone else and the planet, put the cat back on.
My sentiment too for road cars, and I would go one step further. I would like to see track cars imposed with emission control too. Count we are lucky while we have not been legislated off the roads yet but that day is coming up fast. Sitting in grid at the track next to a catless V8 can shorten my life on track greatly. |
I guess if you want it fast and no emission go with a Tesla.
Well the good good news is i found the leak. It’s where the catback starts. Broken gasket. Also where the clamps are are leaking. The muffler shop warned me about this. Theres gotta be a way to seal those without welding. |
Originally Posted by pnwR53S
(Post 4478938)
:thumbsup:
My sentiment too for road cars, and I would go one step further. I would like to see track cars imposed with emission control too. Count we are lucky while we have not been legislated off the roads yet but that day is coming up fast. Sitting in grid at the track next to a catless V8 can shorten my life on track greatly. On a road car it's ignorant to run without catalytic converters. |
I am not going to get into the political aspects of this thread, but the rear hatch is adjustable. The two rubber bump stops on the hatch can be turned out or in, to get the gate to seal and not rattle, which is a happy medium. if the gasket is torn (that surrounds the hatch) replacement is required.
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No. It is not a political subject. It is a civic responsibility and the laws.
The air all the living things that breath is far from political. Willful ignorant has no excuse. Let me just point out a few things pertaining to emission and society's attitude change. Social attitudes change at glacial pace for the ignorant. But for those with keen sense of environmental awareness the pace is faster than you like.
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This thread turned into a weird direction. OP asks about exhaust leak, thread turns into preaching about emission controls.
I hope the preachers also change their oil no sooner than six months, use only distilled water and water wetter instead of coolant, only use their AC with the windows up, keep their tires inflated properly, etc, etc |
OP asked about the exhaust because he happened to notice how vile is the de-cat'ed exhaust because of the small leak make it back into the cabin, or else he would have lived in ignorance is bliss. BTW, he should weld those pesty joints shut so only the poor soul behind him need to suffer. You are doing well as an Angry 15-poster on NAM.
And yes, I am not a compulsive obsessive oil change neurotic and I don't always use distilled water or wetter than water wetter for coolant. Seems you can use some coolant to calm your trouble soul. :grin: You are so insightful too, on my tire obsession. I happened to invested in a tire pyrometer because of my obsessive compulsive about the rubber that meets the road. BTW, whatever happened to your wt/hp or hp/wt list in your signature? I had the impression that you are seasoned SCCA racer because of it. |
Originally Posted by veedubpat
(Post 4479068)
The purpose of test pipes / cat-less exhausts on race cars is due to the level of heat contained within a catalytic converter. A proper race car participating in an event would very likely fail due to the constant use and heat the catalytic converter(s) would retain.
On a road car it's ignorant to run without catalytic converters. |
Well, just an update, went to the muffler shop today, they said they fixed the leak, changed the gaskets and gobs of RTV, coming home had the AC circulating again and still seeing my ppm meter going up, not as fast as before.. hence my shifter box cover is slit due to the short shifter.
but still , how can exhaust gasses still making it inside the cabin? is the draft from the hatchback bringing the exhaust fumes back in? I wonder why kids always falls asleep in cars ( just a thought ). |
Originally Posted by Serafin
(Post 4479304)
Well, just an update, went to the muffler shop today, they said they fixed the leak, changed the gaskets and gobs of RTV, coming home had the AC circulating again and still seeing my ppm meter going up, not as fast as before.. hence my shifter box cover is slit due to the short shifter.
but still , how can exhaust gasses still making it inside the cabin? is the draft from the hatchback bringing the exhaust fumes back in? I wonder why kids always falls asleep in cars ( just a thought ). |
Originally Posted by MINI33342
(Post 4479302)
Hmmm.......WRC cars run cats. As do a lot of other series.
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Originally Posted by ItsmeWayne
(Post 4479312)
My guess is the rear hatch is causing a vacuum and sucking in the Co2/Cm. It is also possible the door glass can be doing the same thing, when they are up.
I also added extra foam seal in the back on the lower part of the boot. Question. I see some vent holes in the trunk. Some old foam material falling off. Where does that lead to? Battery area? |
Originally Posted by veedubpat
(Post 4479318)
Really? Interesting, I was unaware (obviously, by my previous statement). I support that, of course, but have always read that cats retain too much heat and would fail in short order in a consistent hard-use scenario.
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WRC cars also use a rear-mounted cat.
1. It reduces the heat load on the cat 2. If it fails, it just blows out the back instead of taking out other components (e.g. mufflers) 3. It removes the fire risk from UNDER the passengers 4. It must be inspected after each stage - putting them at the back means quick/easy swapping These are remarkably cheap for what they are: https://shop.namelessperformance.com...-tip-w-v-band/ |
Originally Posted by I_Forge_KC
(Post 4479337)
WRC cars also use a rear-mounted cat.
1. It reduces the heat load on the cat 2. If it fails, it just blows out the back instead of taking out other components (e.g. mufflers) 3. It removes the fire risk from UNDER the passengers 4. It must be inspected after each stage - putting them at the back means quick/easy swapping These are remarkably cheap for what they are: https://shop.namelessperformance.com...-tip-w-v-band/ |
Originally Posted by Serafin
(Post 4479326)
Question. I see some vent holes in the trunk. Some old foam material falling off. Where does that lead to? Battery area?
You'll want to patch that foam with screen door material or something - I had mice get in through those vents. |
Originally Posted by HaltCatchFire
(Post 4479341)
There are outside exhaust vents for the air conditioning system. Pulls in through the cowl, pushed out through the trunk.
You'll want to patch that foam with screen door material or something - I had mice get in through those vents. Still trying to figure out where the gasses are coming in from 🤷🏻*♂️ |
Originally Posted by Serafin
(Post 4479344)
So that’s where it goes out when i have the circulating button off. Then i don’t get any carbon monoxide in the car. But when i have it on. That’s when it comes in.
Still trying to figure out where the gasses are coming in from 🤷🏻*♂️ |
Originally Posted by HaltCatchFire
(Post 4479358)
Here's a quick test, put duct tape over those sill vents and see if it still comes in on recirc. Might at least eliminate the vents as a cause.
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Originally Posted by HaltCatchFire
(Post 4479358)
Here's a quick test, put duct tape over those sill vents and see if it still comes in on recirc. Might at least eliminate the vents as a cause.
went to muffler place to redo all my flanges. They did silicone rtv seal on all of them. No leaks underneath. Also did soap test on my headers and no leaks there mind boggled right now |
Originally Posted by Serafin
(Post 4484318)
Taped it and problem still there
went to muffler place to redo all my flanges. They did silicone rtv seal on all of them. No leaks underneath. Also did soap test on my headers and no leaks there mind boggled right now |
Originally Posted by disgruntledcow
(Post 4578355)
Did you ever solve this? Same issue in mine. Going to replace the outer trunk seal first.
And i have no leaks underneath. I think it’s just being a hatchback and having no CAT. 🤷🏻♂️ |
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