An Exhaust Flex Pipe Replacement cost in Ankeny in 2023

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An Exhaust Flex Pipe Replacement costs by shop in Ankeny.

CarAdvise Customers save an average of $0 on An Exhaust Flex Pipe Replacement.


Average cost of An Exhaust Flex Pipe Replacement for popular vehicle models in Ankeny:

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THE IMPORTANCE OF An Exhaust Flex Pipe Replacement

What is an exhaust flex pipe and how does it work?

An exhaust flex pipe is one component of the exhaust system in most vehicles.

The internal combustion engine in your vehicle relies on rapidly expanding gasses produced by burning fuel in order to propel the pistons and produce power. The combustion process, however, carries some unwanted byproducts in the form of harmful emissions (such as carbon monoxide, hydrocarbons, and nitrogen oxides), heat (as much as 1,000 degrees Fahrenheit), and noise. Therefore, an engine is fitted with an exhaust system to quiet down the sound of the engine and to route the engine exhaust away from vehicle occupants.

The exhaust system features a number of components fitted together in a configuration that snakes its way along your vehicle’s underbody. First, the hot and hazardous gasses are collected in the exhaust manifold as they exit the engine’s cylinders. From there, the exhaust passes through a pipe (the downtube) to the catalytic converter and ultimately to the muffler and out of the tailpipe at the rear of your vehicle.

Compared to most of the pipes that connect components of the exhaust system, the flex pipe is unique. It is usually made of braided stainless steel so that it can flex or move with the vibrations of your engine. Although it can be used in various applications in the exhaust system, it is typically mounted in the downpipe section of the system between the exhaust manifold and the catalytic converter.


How do I know if my vehicle needs a new exhaust flex pipe?

Your exhaust system is subject to a good deal of vibration and exposure to the elements. The flex pipe is no exception. In fact, it receives more vibration than the rest of the system, since its job is to absorb the motion of the engine. Therefore, the component needs to be replaced if it becomes cracked with wear or corroded over time. Engine performance can also be impaired if the flex pipe fails, since a leak can lead to improper oxygen sensor readings. Typical signs that the flex pipe needs to be replaced include:

Excessive engine noise

The smell of exhaust fumes anywhere but the rear of the vehicle, including the passenger compartment

Visible signs of corrosion or cracking on the flex pipe

Engine becomes sluggish or lacks power

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How does a technician perform An Exhaust Flex Pipe Replacement ?

The procedure to replace an exhaust flex pipe will depend on where the pipe is located and whether it is bolted or welded in place. If, for instance, the flex pipe is mounted between the exhaust manifold and the catalytic converter - and it is integrated into the down pipe - the entire section of exhaust pipe from the engine to the catalytic converter or beyond will need to be removed in order to cut out the old part and weld in a new one. That type of repair cannot be performed while the exhaust system is in place.

Since it is common for a flex pipe to be used in the down pipe section of the exhaust system, general steps to replacing the component might include:

  • Lift and support your vehicle in the air to access the exhaust system
  • Unfasten the nearest bolt-together junction available so that the foremost section can be removed from the vehicle
  • Disconnect the wiring to the oxygen sensor(s)
  • Unbolt the down pipe from the exhaust manifold
  • Remove the forward section of the exhaust system from the vehicle
  • Cut the flex pipe at each end
  • Prep the surface of the remaining down pipe sections
  • Weld the new flex pipe to the remaining sections
  • Insert the repaired downpipe section in the vehicle and fasten to both the exhaust manifold and the rear section of the exhaust system
  • Reconnect the oxygen sensor(s)
  • Lower the vehicle and start the engine to verify that the leak has been repaired In some cases, a technician might forgo the welding process by replacing the entire down pipe section with a new one. This depends on the types of replacement components available and will differ from one vehicle make and model to the next.


Can you replace a flex pipe?
If the exhaust flex pipe fails in your vehicle, it can be replaced. The procedure to replace the component can differ from one vehicle to the next, depending on whether it needs to be welded or bolted in place. The flex pipe is often difficult to access, since it is located behind the engine, where the down pipe exits the exhaust manifold. Therefore, it is recommended that a trained technician who can safely lift and support your vehicle (among other things) perform the repair.
Can I drive with a broken flex pipe?
It is technically possible to drive a vehicle with a broken exhaust flex pipe. But that does not mean that you should do it. It is important to correct an exhaust leak as soon as possible, since an exhaust leak can pose a serious hazard. The fumes that emanate from the exhaust system are harmful, especially if they enter the passenger compartment. And the excessive noise produced by a leaking exhaust system is unlawful in most municipalities.
Will a broken flex pipe cause a check engine light?
A broken or leaking flex pipe that is mounted in the down pipe section of the exhaust between the exhaust manifold and the catalytic converter can certainly cause the check engine light to come on. That is because an exhaust leak located before the oxygen sensors can cause an improper reading of the amount of oxygen in the system. The vehicle’s computer will detect the abnormality and turn on the check engine light.

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