Can EGR cooler get blocked?
The EGR cooler can fail in 2 main ways -it can get blocked or it can develop a leak. Blockages will restrict the exhaust flow and also raise the intake temperature because the EGR cooler works like a radiator in reverse with heat from the exhaust gas flow being transferred to the engine coolant.
Can faulty EGR valve cause overheating?
Engine overheating: if coolant flow is restricted, the EGR cooler is unable to cool the exhaust gases. This not only allows NOx emissions to continue, it also causes overheating which can cause serious damage.
Can an EGR cooler be cleaned?
That’s a reasonable idea; EGR coolers are like radiators, only they use water to cool hot exhaust gases, instead of air to lower the hot water’s temperature. That means they can be cleaned like a radiator. If the water runs clear, that’s as good a job your liquid cleaner is going to do.
What causes EGR to fail?
The failure of the EGR valve on the vehicle is not out of the ordinary, as this issue can arise on most modern diesel engines. The failures are usually caused by a build-up of deposits in the EGR valve over a period of time that causes them to stick.
Can a bad EGR valve cause white smoke?
White Smoke – while that pesky Valve can cause an abundance of black smoke billowing from the pipes, a failing EGR Cooler actually emits white smoke, or steam, caused by evaporating coolant inside the cooler. When you see white smoke, call for help.
What are the symptoms of a faulty EGR cooler?
Symptoms of a worn, clogged or faulty EGR cooler. Engine overheating: if coolant flow is restricted, the EGR cooler is unable to cool the exhaust gases. This not only allows NOx emissions to continue, it also causes overheating which can cause serious damage.
What causes white smoke from a bad EGR cooler?
White smoke. When EGR cooler starts to fail, it will drain a lot of coolant out of the EGR cooler into your exhaust system. When that happens, the exhaust goes thru and interacts with that coolant and turns it into steam then come out in a form of white smoke out of the back of your exhaust system. Missing coolant from your D gas/overflow bottle.
Why does a diesel engine need an EGR cooler?
The gas circulated by the EGR system can be considerably hot however, especially in vehicles equipped with diesel engines. For this reason many diesel engines are equipped with EGR coolers to lower the temperature of the exhaust gases before they enter the engine.
What are the symptoms of a bad coolant temperature sensor?
Hence, it is advised to have your car inspected right away to avoid any serious problems. Here is a more detailed list of the common symptoms of a bad coolant temperature sensor. One of the first symptoms you will notice is that the check engine light will activate.