Repair 7

How to Troubleshoot the Exhaust System in a Honda Accord

Explore challenges with your Accord exhaust system by pinpointing the problem. Inspect key components from the engine to the tailpipe because exhaust system troubles could come from various places. Troubleshoot the exhaust system in a Honda Accord by acting on warning signs from system devices. Team up with a mechanic to apply these steps for most model years.

Instructions

1

Inspect the exhaust manifold and cylinder head because leaks usually occur where these devices connect. Thermal expansion and contraction cause this problem. Shear stress afflicts the exhaust manifold gasket every time you start your Accord, drive it or turn it off. With time leaks can develop.

2

See if you hear an intermittent hissing or popping sound while the engine is going. Furthermore, look for paint discolorations or burns near the exhaust ports on the cylinder head. Make certain to check your spark plug wires and boots for burns.

3

Examine the joining area between the exhaust manifold and head pipe. The back-and-forth motion of your engine caused by drive torque leads to movement at the joint where the head pipe meets the exhaust manifold. Hot gases that escaped this area could cause discoloration. This relates to the 2.4L and V6 engines.

4

Check exhaust pipes for damage. Use the large pliers to put pressure on the pipes. Replace any pipe that breaks, tears or gives under pressure. Run the engine when testing your system because leaks and other problems are more obvious with the engine going.

5

Listen for strange sounds coming from exhaust areas including your muffler. A buzzing noise that increases with acceleration could reflect exhaust system problems. A whistle sound or high-pitched hissing noise in the tailpipe could result from system restrictions. Get a mechanic to read your engine intake manifold vacuum. Low readings generally mean exhaust blockage.