Question about 1999 Oldsmobile Alero

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What size is the exhaust at the catalytic converter?

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If you need a clamp for converter,you
will have to measure it yourself

We don't have that info

Posted on Mar 17, 2011

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1 Answer

Location of a oxygen sensor on a Nissan quest


If you have the 6 cylinder there will be two in the exhaust manifold before the catalytic converters and two in the exhaust pipes after the catalytic converters.

Always post a year, make, model and engine size to help us get you the best info we can...

Apr 17, 2016 | Nissan Cars & Trucks

1 Answer

Where are o2 sensors location


One would need the year, make, model, and engine size to tell you exactly where they are and how many.

O2 sensors are always in the exhaust stream, either in the exhaust manifold that is attached to the engine, or in the exhaust piping after the exhaust manifold. Some models have one for each bank of the engine, and some have only one sensor to monitor oxygen content. These engine sensors that the computer uses to "fix" or adjust the air/fuel ratio are called the upstream oxygen sensors. If the car is equipped (as most are today) with an oxygen sensor after the catalytic converter, this is called a downstream oxygen sensor. They are the same and do the same thing, but the downstream sensor is only used to monitor the efficiency of the converter. The upstream sensor(s) are what the computer reads to adjust or "trim" the fuel delivery.

So some older cars have only one o2 sensor. Not far from the engine in the exhaust stream. Some newer cars with dual exhaust (2 converters) may have four o2 sensors. 1 for each bank of the engine and 1 behind each catalytic converter. A 2005 Buick Century with a 3.1L engine, for instance, has only two o2 sensors: one (upstream) in the exhaust down pipe, and one (downstream) just behind the catalytic converter.

Aug 16, 2014 | Cars & Trucks

1 Answer

Catalytic converter


Any exhaust shop will have the correct size converter for your vehicle as they vary car to car

Feb 19, 2014 | 1987 Jeep Cherokee

1 Answer

I have a jeep comm 2007 50,000 ml i keep getting code po13c i change my sensors twice already.the code come back after 3 mounth when i drive 60 ml per hr.


old post, no engine size stated. 3.7, 4.7 or 5.7?
Fed or Cal car.?
the codes are real, but guessing the parts bad, dont work.
there are tests you can do , that will find any DTC.
the FSM lists them.
NO other DTC, using a full scan tool .?
if not using a scan tool, you may be blind to others.
the dash codes, are limited. USE a REAL SCAN TOOL.

P013C?
oxy 2/2 slow response. rich to lean.
Bank 2 sensor 2, is behind cat 2. right side. of car.
my guess is exhaust leak near here.
based on , front sensor 2/1 is happy.
any good shop with a smoke machine can find this is 15min flat.
why not get good help, that has good tools.???

here are the sensor rules, Cal versas FED:
The CAL car has mini cats and works differently.

If equipped with a California Emission Package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic converter. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic converter. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic converter, and before the main catalytic converter. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic converter, and before the main catalytic converter.

Jan 31, 2014 | 2007 Jeep Commander 5.7

1 Answer

2000 S80 2.9 Is the connection where the exhaust and catalytic converter meet threaded on both the exhaust and the catalytic converter, or does the bolt just go through both and have a nut on the end? ...


SPRAY PENETRATING OIL LET IT SOAK 30 MINUTES THEN REMOVE BOLTS .THE BOLTS GO THROUGH CATALYTIC NUTS HOLDING ON THE OTHER SIDE.THE OTHER SIDE CATALYTIC CONVERTER HAS CLAMPS HOLDING IN PLACE OR IT COULD BE SPOT WELD IN PLACE THE CATALYTIC CONVERTER MAY OR MAY NOT PULL AWAY FREE I HAD TO GO TO MUFFLER SHOP SOME TIMES THEY HAD TO CUT THE WELD SPOTS SEAL EXHAUST PIPE TO THE CATALYTIC CONVERTER.

Oct 30, 2011 | 2000 Volvo S80

2 Answers

Where do we find the o2 sensor on a 99 ford expedition?


there is actually 4 o2 sensors all located in the exhaust, one on each manifold or just after the manifold and then there is one before the catalytic converter and one after it

Feb 14, 2011 | 1999 Ford Expedition

1 Answer

I have a 2000 Ford Escort zx2, but I need a new catalytic converter and the prices differ depending on the size of it. I was wondering if you could tell me the size of my catalytic converter so that I...


The converter on this car is very specific as it is part of the mid pipe between the exhaust manifold and exhaust pipe. www.rockauto.com has one listed for $167 plus shipping.

Jan 13, 2011 | 2001 Ford Escort ZX2

1 Answer

What are the torque specs for 1996 Buick Century 3.1 L intake manifold?


Front Pipe REMOVAL & INSTALLATION Pipe Without Catalytic Converter
  1. Before removing any component of the exhaust system, always squirt a liquid rust dissolving agent onto the fasteners for ease of removal..
  2. Raise and support the front of the vehicle on jackstands.
  3. Remove the exhaust pipe-to-manifold nuts.
  4. Support the catalytic converter, then disconnect the pipe from the converter. Remove the pipe.
  5. Remove the exhaust gaskets. To install:
  6. Be sure to use all new gaskets when required. Assemble the system, check the clearance and tighten the bolts to about 15-30 ft. lbs. (20-41 Nm). Fig. 1: Front exhaust pipe connection common on vehicles with the catalytic converter not included 86813320.gif

  7. All clamps should be tightened to about 18-25 ft. lbs. (24-34 Nm). Do overtighten the clamps. If pipes become dented they can leak.
Pipe With Catalytic Converter
  1. Before removing any component of the exhaust system, always squirt a liquid rust dissolving agent onto the fasteners for ease of removal.
  2. Raise and support the vehicle.
  3. On some vehicles you will need to remove the brace from the transaxle.
  4. Remove the exhaust pipe nuts from the manifold.
  5. Support the catalytic converter pipe bolts from the rear of the converter.
  6. Lower the catalytic converter/front pipe assembly from the vehicle. To install:
  7. Be sure to use all new gaskets when required.
  8. Attach the new catalytic converter/front pipe assembly to the vehicle. Tighten the pipe to manifold nuts to 20-40 ft. lbs. (27-55 Nm).
  9. Attach the bolts at the rear of the catalytic converter/front pipe. Tighten them to 30-35 ft. lbs. (41-47 Nm).
  10. Connect the brace at the transaxle if removed.
  11. Lower the vehicle. prev.gif next.gif

Dec 18, 2010 | Buick Century Cars & Trucks

2 Answers

I have an 1998 Chevy Blazer and need to change the catalytic converter, are the flange bolts welded and can i cut them


Catalytic Converter Removal & Installation 2.2L Engine To Remove:
Catalytic converter 2.2L engine gm-03-22-734.gif

  1. Raise and safely support the vehicle.
  2. Disconnect the heated oxygen sensor (HO2S) electrical connector.
  3. Remove the exhaust manifold pipe flange mounting nuts from the catalytic converter.
  4. Remove the catalytic converter flange mounting nuts from the muffler.
  5. Remove the catalytic converter from the muffler.
  6. Remove the catalytic converter from the rear hanger bracket insulator.
  7. Remove the catalytic converter.
  8. Remove the (HO2S) from the catalytic converter.
To Install:
  1. Install the (HO2S) to the catalytic converter.
  2. Install a new gasket and the catalytic converter to the muffler.
  3. Install catalytic converter to the catalytic converter hanger.
  4. Install the catalytic converter flange mounting nuts to the muffler flange.
    • Tighten to 26 ft lbs (35 Nm).
  5. Install the catalytic converter flange mounting nuts to the exhaust manifold pipe flange.
    • Tighten to 26 ft lbs (35 Nm).
  6. Connect the heated oxygen sensor (HO2S) electrical connector.
  7. Lower the vehicle.
------ Catalytic Converter Removal & Installation 4.3L Engine To Remove:
  1. Raise and safely support the vehicle.
  2. Raise and support the transmission.
  3. Remove the transmission support
  4. Disconnect the left and right pre-converter heated oxygen sensor (HO2S) electrical connector.
  5. Disconnect the post-converter (HO2S) connector. Muffler flange and gasket gm-03-43-731.gif

  6. Remove the catalytic converter flange mounting nuts from the muffler.
  7. Remove the catalytic converter from the muffler.
  8. Remove the exhaust manifold flange mounting nuts from the catalytic converter. Catalytic converter 4.3L engine gm-03-43-735.gif

  9. Remove the catalytic converter from the support bracket insulator.
  10. Remove the catalytic converter and gaskets.
  11. Remove the heated oxygen sensor.
To Install:
  1. Install the heated oxygen sensors as needed.
  2. Install a new gasket and the Install the catalytic converter to the support bracket insulator.
  3. Install the catalytic converter to the exhaust manifold flange. Install the mounting nuts.
    • Tighten to 39 ft lbs (53 Nm).
  4. Using a new flange gasket, install the catalytic converter to the muffler. Install the mounting nuts.
    • Tighten to 30 ft lbs (40 Nm).
  5. Connect the left and right pre-converter heated oxygen sensor (HO2S) electrical connectors.
  6. Connect the post-converter (HO2S) electrical connector.
  7. Install the transmission support.
  8. Lower the transmission.
  9. Lower the vehicle.
prev.gif next.gif ---
It looks like you can cut them and replace them with new bolts and nuts.prev.gif next.gif

Sep 05, 2010 | 1998 Chevrolet Blazer

2 Answers

Where in the engine is the catalytic converter


The catalytic converter is part of the exhaust system and is usually found under the vehicle, and the exhaust will run from the exhaust manifold to a pre-catalytic converter, and then down to the catalytic converter, and then the exhaust will run from the catalytic converter to the exhaust muffler, and then continue out to the end of the tail pipe.
I have provided an image of the catalytic converter to help assist you.




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Jun 17, 2010 | 2003 Chevrolet Impala

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