Seven Rocks
About Seven Rocks Automotive Contact Us How To Find Seven Rocks
Seven Rocks Automotive Incorporated    
Seven Rocks Automotive Incorporated
Our Services Our People Our Commitment Your Most Welcomed Feedback Thank You For Supporting Us
   Most mufflers have lifetime warranty now.






Emissions Controls



















Automobiles release far fewer pollutants into the atmosphere than they did 20 years ago, thanks to sophisticated emission control systems. There are two critical elements to these systems which, over time, commonly need replacement.

Catalytic converter. This device converts dangerous polluting gases (such as carbon monoxide) into water vapor and less harmful gases. When a replacement converter is needed, it is often smaller than the original, factory-installed equipment, thanks to continually improving technology which lets converters work more efficiently.

Oxygen sensor. This device constantly monitors the percentage of oxygen present in exhaust gases and transmits that information to the engine control computer. The computer then adjusts the air/fuel mixture to assure the cleanest combustion. A properly functioning oxygen sensor is therefore critical to engine performance.


Exhaust System

Troubleshooting Process









Exhaust manifolds and gaskets: check for cracks that may cause leaks.

Mufflers and resonators: look for rusty, jagged holes, especially around seams at the front and back. Also check for rust on connections. Listen for rattles indicating loose internal parts.

Vacuum components in the emission control system: check valves, delay valves, diaphragms, hoses and tubes.

Oxygen (O2) sensor: check for damaged signal wires, blocked air intake openings, cracked sensor body or oil contamination.

Catalytic converter: examine for discoloration (a sign of overheating) as well as external dents, clogging or corrosion. Listen for rattles indicating loose internal parts.

Seven Rocks Automotive Services | 2667 Kingsway, Vancouver, B.C. V5R 5H4 | Telephone:(604)439-7877 Fax: 604-439-7877
2004 Seven Rocks Automotive Incorporated. All rights reserved.