Does anyone know if radiators or oil coolers crack suddenly or slowly? I have water in my sump and oil in my radiator and dealer tells me its the oil cooler that has cracked allowing water and oil to mix. Hoping it's not a head gasket problem! Car was running fine (just been serviced 1000 km's ago) and coolant low warning light came on. 2005 KJ 2.8 CRD!
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