There are a number of easy exhaust checks that can be undertaken by someone with limited mechanical knowledge. We would always recommend that you wear eye and hand protection whilst checking your exhaust. These checks are as follows:
Scrape away surface rust – Brush off the rust from the exhaust system and inspect it for small holes. These can draw in air from outside the system, igniting any unburnt fuel, which could cause a backfire in the exhaust and further damage to your car. You can even shop for the VCM VE Commodore V8 OTR Intake kit to eliminate any kind of exhaust problems from your vehicle.
Inspect joints and connections – Here you are looking for streaks of soot and black marks around the connections and flanges. If you come across these tell-tale signs of gas escape, then you may be able to solve the problem by simply tightening the clamps or replacing them if the studs are rusted.
Check the supports – Older systems use straps to hold the exhaust manifold to the car, whilst newer systems use rubber loops. In either case, check that these are placed correctly around the car’s bodywork and that they have the right degree of flexibility.
Catalytic convertor problems – A sure sign that your CAT is breaking up is a small rattling sound coming from the unit. This may mean that the part needs replacing. The best way to care for your CAT is to ensure that your engine is running well and not leaking excess fuel into the unit.
Diesel particulate filter – This unit combines with the CAT to remove particles of soot from the exhaust system. However, it is designed to work at certain temperatures that require you to run the engine for more than a set amount of time. If you are using your vehicle for lots of small trips it is advisable to take it out for a half-hour plus drive every month to clean this part.