Over time, the filter can get dirty and restrict the air flow, and therefore pressure relieving capacity of the system. If the pressure builds too high, it can cause gaskets and seals to blow causing oil leaks. 2. High idle. Another symptom of a potential problem with the crankcase vent filter is an excessively high idle. If the filter becomes carter said: Yes, the EGR was on prior, but when I pulled it off there was fresh oil all over the gasket (which was still stuck to the valve). The bolt was quite stubborn to remove. It felt like the threads in the head were damaged. I'll bet this resulted the valve not being properly clamped to the head. There can be many causes for engine surge, and they may vary from one car model to the next. When this fault appears, there are a number of components or systems you may want to look into first: Vacuum leaks at the intake manifold or vacuum hoses. Leaking, sticky, or partially restricted fuel injector (s) A faulty emission control system. Exhaust Leak. Another symptom of failing coolers is exhaust leaks. Whenever the gaskets on your cooler degrade or the cooler are compromised in any way, an exhaust leak might emerge. Any exhaust leak can be identified by a noticeable tapping or hissing noise emanating from your car’s front. Take note though that a faulty coolant container causes smoke to come from the engine, not from the exhaust pipe. 4. Oil Leakage. A faulty valve or piston will cause the oil to leak into the combustion chamber and be burnt together with fuel. With the burning of the mixture, however, blue smoke, instead of whitish, is released. Jul 29, 2016. #2. Quite possibly, yes. The only way I have ever seen an EGR cooler fail is it blew coolant into the intake and it did so pretty suddenly and pretty bad, like a Batman smoke screen bad. There is no "pressure" in the exhaust of the EGR cooler that would overcome the pressure in the cooling system, just enough pressure to overcome EGR is exhaust gas recirculation. So yes a leaking egr cooler can contaminate your oil with antifreeze.When an EGR cooler is leaking it is releasing antifreeze into the exhaust flow recirculating back thru the engine, that is how antifreeze is showing up in your oil analysis. A faulty EGR valve can cause a misfire all too often. It is usually caused by clogged passages inside your car’s intake. It will also diminish your vehicle’s power output. Oil vapors inside the engine increase carbon accumulation inside the exhaust gas recirculation valve, causing a stuck valve. .

can a bad egr valve cause oil leak