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Questions tagged [exhaust]

Questions about Exhaust systems, Catalytic Converters and Headers/Manifolds

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2answers
31 views

Can Exhaust leaks be repaired by welding?

I have some small leaks(few mm) in my manifold and down pipe. As mine is a rare US manufactured car(civic vti 99) and I'm in uk, mechanic said it will be quite difficult to find the part. I aksed ...
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1answer
30 views

What ways can exhaust leaks get into the cabin and how can I prevent\reduce it temporarily?

I have some small exhaust leaks(manifold and downpipe) and obviously need to replace those parts. However I can currently smell exhaust fumes coming through the windows and also through the heater(...
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1answer
34 views

Cause of quiter, less crisp, non peppy an less vibrant sounding car

Car is a civic vti 99. After taking back from garage following radiator replacement I found that it sounded quieter, less crisp, less peppy and vibrant than before. I thought the engine may have ...
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0answers
11 views

Cold weather idling issue, white smoke, black soot and loss in power

I have a 1976 cj7. I recieved it as a gift from my Dad in March this year. I absolutely love this Jeep and have been driving it as often as possible. It had a really bad idle and severe exhaust/fuel ...
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1answer
30 views

Can I spray paint a engine's heat shield?

While planning some tasks for "restoring" my engine bay, I noticed one of the things that significantly affect the way it looks is the heat shield. It's rusty, since the corrosion was probably much ...
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3answers
40 views

Catalytic Converter self-service

Can I remove catalytic converter, remove loose fragments, then put it back on without harming vehicle? I have a 2003 Ford Windstar.
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2answers
82 views

Why would a lighter flame go into an exhaust pipe?

I just saw this image and I am wondering what is happening here: The car was running and it seemed that the wind direction was out of the pipe?
2
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1answer
32 views

Exhaust backfire on reductions/engine braking

I've recently acquired a 2001 Corsa Milenium (a Brazillian saloon version of the Opel Corsa B, with a GM 8V 1.0 MPFI engine). It has a performance air filter (which I plan on replacing with the ...
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0answers
32 views

Plastic smell of new flex exhaust pipe

I've just got installed new flex exhaust pipe. After driving for few minutes, when the engine started to get to operating temperature I started to notice a plastic odor inside of a car. I started to ...
2
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1answer
27 views

2005 toyota camry 3.0l bank 1 sensor 2 where is it

i have a 2005 toyota camry v6 3.0l it needs a bank 1 sensor 2 where is it or which one on the exhaust is it. im not sure about words like downstream just want to make sure
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2answers
45 views

Catalytic converter without heat shield?

My car was making a rattling noise when driving with very low RPM and slow, or very high RPM and fast. When cruising it was OK. Drove car to the mechanic and he said that cat is broken. He replaced ...
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1answer
54 views

Why do some cars fart?

Sometimes, I'll hear Mustangs and Honda Civics "farting" and making loud noises. What is the cause of this and why doesn't my car do it?
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2answers
27 views

dashboard light to replace catalytic converter, later engine loud dash light disappears

A engine checklght appeared on my 2004 Hyundai Elantra GT hatchback, and was diagnosed as a faulty catalytic converter, that was considered normal for the age of the car. About 3 days later when i ...
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0answers
21 views

Black soot on exhaust manifold 2015 Ford KA 1.2

Is this normal or does it need replacing?
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0answers
14 views

VW Golf MK4 BCB engine vibrations at ~1850 RPM

I have gotten exhaust front-pipe (1J0254300P), and catalyst changed in my VW Golf MK4 BCB engine. The used part was an aftermarket part from BM-Catalysts. Since then it has some vibrations between ...
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1answer
579 views

What is this piece, and is it important?

I recently started hearing a rattling noise coming from under my 2009 Kia Sedona. I jacked it up and found that a piece had completely rusted off and was just resting on top part of the exhaust ...
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2answers
109 views

How to remove broken bolt with screw extractor from exhaust manifold

Okay folks, so I have here an exhaust manifold from a 1989 Volvo 240. I was able to disconnect it from the downpipe without breaking all but a single bolt. I snapped about a quarter inch from the ...
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0answers
21 views

California CARB converter list by the CA Air Resource Board is no longer available

The only CARB listed converters by California is AP Exhaust 749233 Direct Fit and 740566 single replacement are no longer available. I called AP Exhaust and they are closed down and not sure if they ...
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1answer
22 views

Intermittent p0420

I'm working on a customer's 03 Isuzu rodeo with the 3.2 6VD1 another shop had put new catalytic converters and O2 sensors on trying to troubleshoot a bad hesitation problem. I've since fixed the ...
2
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1answer
23 views

Most durable exhaust hanger?

I have a 2004 f150 and the exhaust hangers have rotted off except that last one at the very back (hook though rubber isolator). My exhaust pipe keeps twisting so that the tailpipe is against the ...
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1answer
30 views

Can I use a yoshimura exhaust in any bike?

I have an old Triumph motorcycle 955i that im customising. I want to change the exhaust and use a second hand yoshimura cheap one Is that possible? Or the exhaust needs to handle different pressure ...
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0answers
18 views

Trouble identifying source of exhaust note change

I am completely inexperienced when it comes to hands on mechanics, though I do understand in a theoretical way how things generally work. I have an Acura Integra 1997 LS that has been gradually ...
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4answers
272 views

Can exhaust problems cause a knocking sound in anyway?

I have an extremely lowered car, the exhaust pipe moves, squeaks and clanks at times. The sounds are not so bad on smooth surface roads. I had been getting a knocking sound from under car and just ...
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0answers
18 views

Squeeking sound back of car caused by exhaust?

My car keeps making a squeaking sound at back. There is an exhaust pipe which if you shake it makes noise. I'm wondering if its that the case, however i only notice the squeeking sound when going ...
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3answers
77 views

What is exhaust gas recirculation?

From what I understand, EGR is used to reduce the temperature of combustion without increasing the amount of fuel injected to reduce NOx emission. This is done by reducing the oxygen percentage ...
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1answer
122 views

Muffler fell off now has transmission issues

My 02 Dodge Caravan's muffler fell off sometime when I was heading to my girlfriends place. I didn't notice it till I got to her place because I listen to music loudly. Anyways I was driving it around ...
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1answer
93 views

Diagnosing a p0420 code for 2005 nissan x-trail 2.5L

I own a 2005 nissan xtrail with a 2.5L engine (QR25DE). I have problems with my vehicle, too much fuel consumption ( 3.8km/L ) My car has a 60Liter tank , my last fuel up gave me 229KM until the ...
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1answer
28 views

Is it unsafe to remove a heat shield?

My car (2007 Nissan Maxima) has a rattling heat shield. It has been rewelded once and is now rattling again. Would it be unsafe to remove it? Is it absolutely needed? What side effects may I have ...
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1answer
50 views

What could be causing High HC GPM, CO GPM, prevent the RPM from going over 4000, and creating an odd exhaust sound?

I have a Toyota Camry 94, it failed its emission test today with 2.62 HC GPM(Limit is 1.2) , 56.87 CO GPM (Limit is 15). The car also won't rev over 4000 RPM and acts as if it has a governor on when ...
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2answers
51 views

A liquid leaking

A liquid (almost sure it's water but I could always be wrong) is dripping out near and/or from my exhaust. I've also heard a weird almost draining kind of sound back there every time I turn the car ...
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2answers
29 views

Loud engine-related noises after impact to exhaust system: any recommendations to pursue?

1999 Toyota RAV4 took a big hit to the exhaust system (near the rear) yesterday on a logging road. Afterward, there was increased engine noise: I concluded immediately this was an exhaust leak induced ...
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0answers
51 views

How can I locate the source of this exhaust rattle?

'04 Infiniti G35. Recording of sound I'm hearing. The best example is at 0:39 onward. Heard best with headphones. Firstly: I'm aware I have an exhaust leak. That part, I can hear all the time, ...
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0answers
18 views

1996 Infiniti g20 fails smog

I am the original owner of this CA car, and have been gradually having higher HC readings on smog checks. It failed in 2016, cleaned out the Air flow components; it passsed, but this increased the NO ...
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1answer
37 views

My 96 s10 sounds like a jet engine

I have a Chevy S10('96) and when the vehicle is warmed up, it is very loud and doesn't accelerate fast from a stop. It's incredible how loud the engine gets and tries, but it doesn't calm down until ...
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0answers
180 views

Will dislodging carbon deposits harm the catalytic converter?

If I use an intake valve cleaner that dislodges chunks of carbon from the intake valves or piston head, and they flow through to the exhaust, could they harm the catalytic converter? I'm interested ...
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3answers
936 views

how long does fiberfix heat wrap last?

I've seen some videos on youtube for using this on exhaust leaks. Some prominent car repair youtubers seem to endorse this too. However some amazon reviews seem to say this wont even last beyond a ...
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2answers
816 views

Can an exhaust leak cause bad MPG?

One of the connections between the exhaust downpipe and DPF filter is leaking (I guess the gasket may be the problem). Recently the leak got a little bit more obvious, I can hear it when reving the ...
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2answers
59 views

Is there any scenario where it is benificial to restrict the airflow of your tailpipe?

Preface: There’s a story of someone who had been instructed to stuff a rag into their tailpipe either fully blocking or partially blocking their tailpipe to prevent the vehicle from stalling / ...
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2answers
743 views

Why Engine oil Leak at bottom of Hero Passion Plus Bike engine?

(Initially i didn't know about the oil limit in passion plus) I accidentally filled 2 Litre engine oil in my Hero Passion Plus Motorcycle, which is more than specified limit (1 Litre). With that ...
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0answers
32 views

Pipe has come out of the silencer?

I hit a pothole this morning on my way to work. I couldn't swerve it so slowed right down but it still sounded painful! Afterwards the car was making a boy racer type noise, so took it to the garage ...
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0answers
50 views

Still having blue smoke

I have no idea in car engines. My car is having a blue smoke in the exhaust. The car mechanic suggest to change the piston rings and valve seals. After he replaced it I still get this blue smoke when ...
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0answers
35 views

Strange sound at end of rev range when push throttle when parked.

I was just wondering what your thoughts are on this sound I’m experiencing with my Jeep? I have a Jeep Commander 5.7 Hemi 2006 with a Magnaflow 49709 cat (newly installed) and a magnaflow 18″ oval ...
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2answers
3k views

Exhaust leak despite tightening the flange all the way

I replaced the catalytic converter on my 93 Miata with a test pipe. The issue is there is an exhaust leak that I can't seem to fix. I tightened the flange all the way around and it still leaks. It ...
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1answer
72 views

Will I burn my exhaust valves?

I have a 2015 Honda CBR500R I am thinking of taking my slip on exhaust off (just for sound,THE LOUDER YOU ARE THE SAFER) and putting on a K&N air filter. Will me doing that burn my exhaust valves?
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1answer
68 views

Why does my car sound like it has no catalytic converter when it hasn't been removed?

Well, my car suddenly started making a sound like if the catalytic converter was removed, which it has not. The noise started when my husband connected the a/c compressor directly to the battery ...
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2answers
76 views

Advantages of installing a bigger exhaust or two pipe exhaust when upgrading to a bigger engine

I recently installed a 328i engine on my BMW E36 320i. Now I know that E36 328i come with a bigger exhaust with two openings, not sure if they are dual pipes. But the 320i come equipped with a smaller ...
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2answers
2k views

Should I be concerned about rusty exhaust pipe on used car?

We are considering purchasing a used 2015, but Pre-certified car. (which means it passed a 152 point inspection in this case) Everything is in great condition, but when we looked under the car, ...
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3answers
196 views

How to slow down speed of sound of motorcycle exhaust [High to Low Frequency]?

[Will] I have an expensive motorcycle - assume:) with a sound of the exhaust of the high-speed engine. How to slow down wave sound speed of motorcycle exhaust [High to Low Frequency] that will sound ...
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0answers
269 views

New car - a lot of smoke from exhaust

I got my new car today from the dealership, and while driving home I noticed there is quite a bit of smoke coming of the exhaust, to the point of blocking my rear window visibility. Only happens when ...
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1answer
44 views

Tailpipe tip color analysis [PHOTO] What is the good tailpipe tip color?

My Nissan Sylphy with a 2L Neo Direction Injection engine was running rich due to 2 faulty injectors (leaking) and I replaced all 4 injectors three months ago. I have put 2000Km during this three ...