Tagged Questions

Questions about Exhaust systems, Catalytic Converters and Headers/Manifolds

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0
votes
2answers
37 views

Stripped exhaust bolt

I got an exhaust I was putting on my car (2013 wrx) and had to disconnect the exhaust after the midpipe. The bolts were rusted so I pb blasted them, and then got one set of bolts off. When I went to ...
0
votes
1answer
29 views

Blue smoke upon acceleration and pinking

I have a Y12 Wingroad Nissan. While driving at 100km/hr and I stop, and begin driving again, I see a lot of blue smoke from exhaust for a little while. I also get a flat spot and pinking when ...
3
votes
2answers
33 views

MINI Cooper Oil Leak

I bought a 2007 MINI Cooper 8/27/14. On 9/9, as I drove to work, I noticed smoke coming from the back & front of the car. When I drove home late that night, the car was not smoking. After that ...
1
vote
0answers
18 views

Mazda 323: How hard is it to change the Lambda / Oxygen Sensor?

This is in continuation to my question Fast Idle and High Fuel Consumption. I just bought a Manual 97 Mazda Lantis 323 1.8L DOHC 16 Valve BP ( apparently called a Protege in the US ) which has a fast ...
4
votes
1answer
119 views

What does it take for a modern muscle car to sound like a classic muscle car?

To preface, I would grade my exhaust knowledge with a "B-". I know what the major components are and what they do, but I don't know if and when certain exhaust parts became mandated or introduced ...
4
votes
1answer
56 views

Exhaust on a replaced motor

I recently had to change the motor in my 2004 Hyundai Sonata. I bought a used one from the junkyard, and it fired right up after I got it put in, and all the wires, hoses, etc. connected. The only ...
3
votes
2answers
64 views

Repairing a thin cut in exhaust pipe

I am looking for a way to repair a small hole I created in my exhaust. The hole is about 1 to 1.5 inches long and only about the width of a cutting wheel (you can guess how the hole got there). I ...
0
votes
1answer
121 views

Persisting 1998 Malibu Exhaust Problem

I am having a problem with a 1998 Malibu. I keep getting several codes but primarily P0420. I have replace the Catalytic Converter twice. Both oxygen sensors have been replaced. I have checked the ...
2
votes
0answers
47 views

How to inexpensively replace missing baffles on a classic bike

Dilemma I have a 1980 Suzuki GS550L. Not only did one of the previous owners completely remove the baffles from the exhaust pipes, but they welded fender washers on the end of the pipes, so the OEM ...
13
votes
3answers
2k views

What does a water-like drop coming out of the exhaust of the car signify?

Sometimes while driving in the traffic, I come across a car or two which would be dripping water-like drop from it's exhaust steadily in a break of 4-5 seconds. I tried to ask a couple of people at ...
1
vote
1answer
111 views

How to install a California oxygen sensor into a federal catalytic converter assembly?

I have a 2000 Mitsubishi Galant ES 2.4L Engine with California emissions. Installed is a new federal catalytic converter assembly. The problem is that I do not know what kind of oxygen sensor to ...
1
vote
2answers
52 views

Can turbochargers cause engine damage gathering dirt and other particles from the air

I have been researching turbochargers and since they use outside air and exhaust to improve engine function couldn't that harm the engine? Or do I not understand the principle? Can't particules from ...
2
votes
2answers
169 views

Improve engine sound of Mazda RX-8

I would like my 2006 Mazda RX-8 Shinka to be a little louder. I just don't know where to start though. The engine has such a nice sound, but I can't really hear it. I don't want it to be so loud that ...
4
votes
1answer
127 views

Options for replacing rusted exhaust mounting bolts

The car is a 2005 Mini Cooper. The bolts that hold the exhaust mounts in place have rusted and snapped on both sides: I've taken up the floor of the boot and have located their heads on either ...
5
votes
1answer
430 views

Does it make the most sense to replace an old car's entire exhaust system all at once?

Back story: The Check Engine light came on in my 2005 Chevrolet Malibu LS Sedan (V6 3.5L). I took the car to a mechanic #1 (M1), an independent shop. They replaced the EGR valve. A day later, the ...
2
votes
1answer
220 views

Changing the exhaust on a motorbike

I have a Yamaha XJ6 from 2012 and I would like to change the exhaust. But I have a choice. Do I change only the muffler or the whole "line"? Other than cost what are the pros and cons of changing ...
2
votes
1answer
457 views

2003 Honda Civic 1.7 vTec - White Smoke from the tailpipe

I have a Honda Civic 2003 gx 1.7 liter vTec stick shift 4 cylinder. Just today I had to put oil in my car. Drove for about 5 minutes got to a light and when I shifted into first gear a white cloud of ...
3
votes
1answer
392 views

Mechanic Troubles And A Small Watery Oil Leak

My car is a 2005 BMW 525i E60 with about 180,000km on the clock. It has been well looked after and serviced. I don't get dealer services, but go to a mechanic who has always been good and uses the ...
0
votes
2answers
48 views

1989 Nissan pintara problem

I have a 1989 U12 2.4l Nissan Pintara. It started running really rough one day and when I got home the exhaust manifold was glowing red hot. I changed the catalytic converter and it still is running ...
0
votes
0answers
45 views

Remove dark layer of particles stuck in Diesel engine tubes?

My BMW E36 M41 engine seems to have a dark dust in the small tube that goes out from the EGR valve. (the other tube contains a sort of dark liquid...) Is it advised to cleanup that dark matter ...
1
vote
1answer
107 views

Volvos with the same parts as the Volvo 440 GL with 2 liter motor?

I have an old Volvo 440 GL (~1994) and I need to find a part to the exhaust system that costs the same amount as the car itself if bought from the Volvo company itself: this is the flange part in the ...
7
votes
3answers
1k views

Catalysator broken? Odd rope coming out of the exhaust pipe

[UPDATE] SOLVED! Hurray! The muffler had corroded inside and it blocked the exhaust system, making bad to motor. I got it fixed and the car energy efficiency improved from 12-15 liters/100km to ...
3
votes
2answers
1k views

Mass Air Flow Expected Values

I have a 2002 Audi A4 Quattro 3.0. I have a Vagcom USB cable and I am trying to diagnose the MAF sensor. I had a friend get some readings from an OBD2 scanner, which indicated that both precat O2 ...
2
votes
2answers
138 views

Is there a good online resource for exhaust system design? (theory)

I am looking for information on the effects of changing certain criteria in an exhaust system relating to its performance and its sound. I am unable to find any resourses relating to this on the net ...
3
votes
1answer
163 views

muffler positioning, and x-flow for specific sound

I am re-designing a ferrari exhaust system with 2 objectives: 1: enhance the specific high pitch raspy sound that you expect from a small ferrari V8. 2: achieve a good free-flow design. There is ...
2
votes
2answers
1k views

Failed emissions - high lambda, low HC and CO

My 2007 Daihatsu has failed the national car test on emissions. The readings at 3500rpm are: Lambda: 1.10 (normal range 0.97 - 1.03) CO: 0.02% volume (normal range below 0.20%) HC: 11ppm (normal ...
2
votes
1answer
297 views

'04 Nissan Sentra - Smoke from engine compartment after long drive

My sister has a 2004 Nissan Sentra with a 1.8L engine, and a day or two ago she started noticing some (not a lot) smoke coming from the engine compartment after driving for a long time (i.e., more ...
2
votes
2answers
428 views

Grey smoke when idling 1999 GMC Suburban, coolant system pressure loss

The most recent update is at the bottom. This looks interesting. The Smoke I'm confident the smoke is from burning oil. It's slightly blue, absolutely not white. If the engine is warm and I am ...
2
votes
1answer
154 views

Dirt bike silencer core cracked/rusted

After removing and disassembling my FMF Factory 4.1 dirt bike silencer, I saw that the inner core was cracked and extremely rusty (having the potential for more cracks). I definitely want to fix this ...
3
votes
1answer
1k views

2000 VW Golf TDi (Mk. 4) grey smoke from exhaust before engine has warmed up

I have had my Golf for 8 years. It’s had good maintenance and a the record is kept by my dad. It’s just passed its MOT (Ministry of Transportation) test, and the mechanic mentioned that the tappets ...
2
votes
3answers
1k views

Remove rounded manifold bolt

I'm trying to take off the manifold bolts on an old Chevy 350 (the ones that connect the manifold to the header). I got 4 out of the 6 bolts out, but 2 are extremely struck and rounded due to all the ...
1
vote
2answers
370 views

straight pipes and carb rejetting?

I have a 1984 Honda GL 1200 standard wing and I am going to put straight pipes on it, however some forums say I will need to upjet the carbs, and others say I will not. Has anyone on this site ever ...
1
vote
2answers
1k views

Exhaust Flame Kit

I have been searching over the past week or so trying to educate myself as much as possible before going ahead and trying to build an exhaust flame kit from scratch (the ones on sale on the internet ...
3
votes
2answers
521 views

VW Golf 2.0 SDI (2005) - smokey when pulling away

Over the last 12 months I have noticed that as I pull away and put my foot down a little more, there is often a bit more of a cloud of smoke left behind. Its not thick smoke but still it seems like ...
4
votes
1answer
203 views

Motorcycles: Way to maintain shiny chrome on exhaust outlets?

I have a motorcycle that has chromed exhaust pipes. I am worried that there will eventually be discolouration where the pipes join the engine, due to the heat. Is there a way to treat the pipes so ...
2
votes
1answer
832 views

Attaching poorly-fitting exhaust components without welding?

I recently replaced my muffler, and attached it to the existing pipe using clamps around a short coupler pipe (sorry, I don't know the right name for these things) that fits around the outside the the ...
1
vote
1answer
81 views

What is this exhaust type thing?

What is this black exhaust type thing coming off the side of this land cruiser? What is it for?
2
votes
1answer
714 views

Why is my exhaust pipe so rusty?

I think all cars exhaust pipes get very rusty after not very long. Why is that? I know that the pipe gets extremely hot, but how come that makes it rust more than any other part of the car?
6
votes
4answers
17k views

Sputtering while driving & idling

[My car: 2004 Mazda 3] So, my wife came home from running some errands and told me the check-engine light was on and that the car was sputtering and felt like it was going to stall while stopped at ...
5
votes
2answers
2k views

should I replace gaskets when replacing exhaust?

I need to replace a broken section of exhaust. Should I replace the gaskets also? one of the gaskets is directly between the engine and the new part. The other is between the new and an old part of ...
6
votes
3answers
2k views

How effective are exhaust patch kits?

How effective are exhaust patch kits in terms of longevity and limiting noise and leakage? Specifically I'm looking at using the kind that consist of heat-activated tape, an aluminium sheet and two ...
2
votes
1answer
871 views

High short term fuel trim on one side when starting car?

2003 Ford Crown Victoria V8 Engine Dual exhaust 2 cats & O2 sensors per side Since some time last year I've been getting an error code throw up, with seemingly no regularity: P2197 - O2 stuck ...
8
votes
1answer
3k views

Is this what is making my car sound like a racecar?

Recently, my car (2000 Mercury Grand Marquis) started sounding like a racecar: the engine became very loud. There's clearly something going wrong with the exhaust system. I'm trying to understand ...
6
votes
2answers
3k views

Muffler off car. Safe to drive with exhaust open underneath?

So leaving work yesterday I heard a clang! - the muffler simply fell off. Further inspection revealed a lot of rust in one particular area on the pipe. Thankfully the forward muffler is still intact ...
2
votes
1answer
636 views

What causes the “pop” and “burble” noises on overrun?

I love the sound, just wondering what causes it.
5
votes
2answers
277 views

Performance Exhaust — what, how, why?

I've seen performance exhaust pipes on sale for cars and motorcycles, and my questions are these: What does it do? (better performance [and how so?]? better mileage? cooler sounds?) Is/how is it ...
3
votes
1answer
122 views

Exhaust smell emanating from old car?

I drive an '97 Subaru Legacy. Far as I know, it still works perfectly. Lately, there's been a bad exhaust smell around the car when I park and get out. I can smell it inside the car on occasion, but ...
3
votes
1answer
374 views

White smoke from tail pipe on operating temp start

I have a 89 Buick Century Custom. On the first start of the day, I have no problem. No smoke and no difficulty starting. However, after the car warms up, say, after driving to a gas station the ...
1
vote
5answers
2k views

How to determine by ear which part of exhaust needs replacing?

I have a 1.3L Skoda Felicia, (carburetter engine without catalytic nor other gimmicks). Since past 1-2 months I would hear the exhaust sound has changed, it became more and more audible and at full ...
4
votes
1answer
1k views

Car Stalls When Coming to a Stop

Make: Chevy Model: Cavalier (4 cyl.) Automatic Year: 1993 Miles: 230K Normally my Cavalier drives just fine without problems. However, if I drive for 45+ minutes then it will sputter and stall out ...