Egr cooler what is it

An inexpensive fix now could save you thousands of dollars later. Diesel Pro offers an extensive line of EGR related products. Search for: Search. What is an EGR Cooler? Has my EGR Cooler failed? Posted on: April 22, Share This:. Exhaust Gas Recirculation. Why do most of the latest diesel engines have EGR Coolers? There are a few things you can check to determine whether or not your EGR cooler has failed: Check your coolant level.

You can find out more in the data protection declaration. Cookies essential for the system ensure that the website works correctly. Without these cookies, malfunctions or error messages may occur.

These cookies make the website easier to use and save settings, for example, so that you do not have to repeat them every time you visit the site. Statistics cookies enable us to evaluate the usage behaviour on the website anonymously — without enabling any conclusions to be drawn about you as a person. This enables us to measure the performance of the website and to improve it continuously to offer a better user experience. Of course, we will always respect the do-not-track DNT setting in your browser.

In this case, no tracking cookies are set and no tracking functions are loaded. Choose language:. Go to company website. Back to search. Information on the product. In simplified terms: Heating a certain volume of gas causes it to expand; the volume decreases as the gas cools down. If the volume is restricted, as is the case for example in a cylinder, the pressure increases with increasing temperature and drops on cooling.

Product group : Emission control. This might also interest you. Information on the product Troubleshooting in exhaust gas recirculation system on Otto and diesel engines Basic information What is exhaust gas recirculation? Information on diagnostics Troubleshooting in exhaust gas recirculation system on Otto and diesel engines 2 Tips for troubleshooting Irregular idling? Information on diagnostics OBD-System OBD and exhaust gas return system The on-board diagnostics shows a fault in the exhaust gas recirculation system, but what does the displayed diagnostic trouble code mean?

Use of cookies and data protection. I have read and taken note of this information. Privacy settings We place great importance on transparent information relating to all aspects of data protection. Change your privacy settings by clicking on the corresponding buttons.

Necessary Cookies essential for the system ensure that the website works correctly. NOx can form smog, and when it mixes with water, it can form acid rain. The ozone layer helps protect us from UV light, but at ground level, this gas may cause breathing problems, especially for those with asthma. This has little effect on performance while reducing the chance of chemical reactions that form pollutants. However, diluting the mixture will be even more effective if the exhaust gas is cool, not hot.

The cooler is piped in between the turbo and the EGR valve. The body has a hollow tube or series of tubes for the hot exhaust gas to pass through. Surrounding these tubes, are several coolant passages. Heat passes through the walls separating the exhaust and coolant, delivering cooler, inert exhaust gases ready to able to lower peak combustion temperatures.

This additional heat is simply dissipated through the radiator. However, since the EGR cooler connects the exhaust and cooling systems of your engine, failures inside the cooler may lead to coolant loss, overheating, and engine damage, among other failures.

Usually, the first sign of failure is white exhaust smoke. There are several possible sources for this steam, including head gasket failure, a cracked EGR cooler or condensation inside the exhaust system.

When the coolant passages inside your cooler leak, the coolant mixes with the exhaust and enters the intake. As with any coolant leak, you may start noticing a lack of coolant in your overflow bottle.

If the coolant is entering the EGR system, it can mix with this carbon. Small amounts of coolant can mix with this carbon, creating a sticky, tar-like buildup. In some cases, there may be enough coolant passing through to strip away the carbon.

This leaves the valve looking like it has been steam cleaned. Severe failures can lead to more drastic consequences. This can push coolant out of the overflow bottle, which may lead to overheating. If too much coolant enters the engine, the pressure can be so high that it may cause hydro-locking.

The force can bend connecting rods, stretch head bolts, or blow the head gaskets, causing severe engine damage.

Often, failure is caused by a combination of poor design and a tough work environment. Some stock coolers use thin, oval passages. These passages are subject to two main types of stress: heat and pressure. The EGR cooler heats and cools repeatedly during a normal drive cycle. Cooled when the coolant flow removes heat and the EGR valve is closed, and then heated and stressed as hot exhaust gases pass through.