July 20, 2018

Exhaust Auto Super Shoppe New Zealand – Depending on your car and its exhaust system, the cost to make repairs to a damaged or broken exhaust component can range widely – but putting off an exhaust repair almost always costs more than addressing them promptly.


Visual inspection under the car

Lift hood and inspect exhaust manifold.

The exhaust system starts as soon as the air leaves the cylinder.

On the side of the engine block there will be pipes running out, connecting together, and then heading to the bottom and back of the vehicle. You may not be able to see much, but inspect what you can see; we’ll get to the rest later.

Check and make sure all the bolts are not loose and are still there. These can fall out over time from the engine vibrations.

Look for cracks in the metal. Due to the heating and cooling over the life of the vehicle, the metal can develop cracks.


Lift the car and set on jack stands.

On a flat level surface, lift the vehicle with your jack. Place jack stands at all corners to make sure the car won’t fall while you are underneath.


Inspect the bottom of the exhaust manifold.

You should be able to see parts of the manifold that you couldn’t before, so inspect the rest for similar issues.


Inspect the catalytic converter(s).

Tap the converter lightly with a rubber mallet or the end of a screwdriver and listen for anything rattling inside.

Over time the interior of the catalytic converter can start degrading and the pieces will rattle inside as you drive. Check the connections going into and out of the converter to make sure they are intact. Any dents or dings, however small, will create a gap for gas to escape.

The converter itself shouldn’t have any external damage. Dents on the outside generally lead to damage on the inside and the whole unit would need to be replaced as a result.


Inspect the muffler(s).

Check the muffler like you did the catalytic converter.

Dents on the muffler or the connections can cause issues with airflow. The muffler tends to be more susceptible to rust damage as moisture can build up inside. Surface rust is normal, but if it penetrates through the metal, you can be sure there is more rust on the inside.


Inspect other connections and pipes.

Check the rest of the pipes for cracks, dents, or excessive rust.

V-style engines and dual exhaust systems tend to have an X, Y, or H connection. Check all the seals for dents. The piping should not contact any other metal. This helps keep the metal cool and keeps the heat from transferring to other parts of the car.


Inspect the exhaust mounts.

As mentioned, the mounts for the exhaust system tend to use a rubber loop to hold the pipes in place and allow for some movement.

Check to make sure the rubber isn’t falling apart and that it is installed correctly. Test the mounts by shaking the muffler. There should be a little play to allow for knocks and bumps, but too much and the piping can hit other components.


Drive in today and one of our experts will check the exhaust for you – or give us a call.