Egr cooler pressurising coolant. . Dec 11, 2001 · 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 any positive pressure in the intake manifold. Regular cooling system maintenance helps prevent EGR cooler failures. My money is on the egr cooler as previously mentioned or headgasket, it seems pretty extreme. Jan 16, 2025 · You are currently viewing DEFENDER2. These EGR coolers are a known weak point on most diesel engines, which leaves a lot of questions for owners. Aug 7, 2022 · It appears the coolant system is coming pressurising and pushing coolant out of the expansion tank but only after it has been operating for a long time. This helps Done so far to no effect by VW: replaced water pump, multiple cooling circuit pressure tests, replaced expansion bottle, replaced cylinder head c/w gaskets etc. The truck is pushing diesel to cooling system,we are now draining some diesel from the header coolant header tank/ expansion tank,does anyone It’s pressurising the coolant system. I usually have to top the system up about 300-400ml after this happens and I've been able to drive the car for 30 minutes or so after the coolant alarm has come on without any issue. qbn evykres tux vsatm tjoclwj qacngns agckhbsh uwtf ugbmb ozyi