Why egr cooler

When this happens, engine coolant mixes with the exhaust stream. Failures in the emissions systems are often minor at first and snowball into bigger problems over time. 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? 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.

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.

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Choose language:. Go to company website. Back to search. Information on the product. Product group : Emission control.