The EGR line, along with the EGR valve, works to recirculate the exhaust gas into the intake manifold. This action does two things: it (1) effectively lowers the temperature in the combustion chamber, and (2) it reduces nitrogen oxide levels. Modern engines are equipped with cooling systems that lower the engine's temperature. New technology like fuel injection systems and oxidation catalysts keep the nitrogen oxide compounds to a minimum. But even with these newer systems, the EGR system still plays a very important part in reducing temperature and excess emissions. An EGR valve that is damaged can be cleaned with a carburetor cleaner and re-greased. An EGR line, however, needs to be replaced once it gives up on your engine. We have listed some tips on how to choose the right EGR line for your car.
Durability and warranty
An EGR line takes damage from the nitrogen oxide pumped through it back to the intake manifold. As such, it needs to be durable against corrosion, stress fractures, and carbon buildup that blocks the flow of gas. Some products have a flex joint that reduces the stress applied to the EGR line and minimizes the damage caused by heat and constant vibration.
A few other additional features dictate how durable an EGR line is. Look for an EGR line that includes sheathing to protect electrical components from heat damage. An EGR tube is usually made of stainless steel-this makes it resistant to the stress and corrosion applied to it daily. Look for an EGR line that carries a warranty of at least six months to a year.
Find one that fits
The brand of EGR line to buy depends on whether it will fit your vehicle or not. Local and online auto part stores can help you decide which EGR line to purchase given your car's make and model.