Before you tear into anything as per internet diagnosis, do some more easy trouble-shooting before you possibly waste time and effort on the oil cooler. The first logical step would be to pull all your glow plugs, get a cooling system tester, pump it up equal to your rad. cap pressure and let the pickup sit pressurized for a period of time. Then crank the engine, if you get ANY coolant out the glowplug holes, that will definitely tell you which end to tear into---blown headgasket, cracked head or heads, etc. If not, then the search is on.
Plus you better hurry, you might need to get that baby fired up quick if CDC is forced to turn loose about 50,000 inmates like the news was saying today! J/K
Plus you better hurry, you might need to get that baby fired up quick if CDC is forced to turn loose about 50,000 inmates like the news was saying today! J/K