I just bought a 2003 Lincoln LS. /the car overheats very quickly. when I removed the water filler cap on the thermostat housing there is milky looking goop in there. The crankcase oil is spotless. The car runs perfect before the temp goes up quickly. The check engine light comes on and the car immediately has zero power. I don't think it is a head gasket because the crankcase oil is beautiful. Someone said that there may be an internal oil cooler in the radiator? Any ideas?


Asked by Bureauveritas Sep 27, 2013 at 12:59 AM about the 2003 Lincoln LS V8 Premium Sport

Question type: Maintenance & Repair

5 Answers


could be a cracked head that will put oil in to your coolent system and a head gasket can do the same. The internal oil cooler is ussaly for your trasmission as far as i remember


water filler cap on the thermosat houseing? are you sure you are not talking about the radiator?

Chris McGee

just because the oil is clean doesn't mean that the headgaskets aren't bad. There is oil valleys in the heads and coolant valleys. sounds like it's pushing oil into the antifreeze. Do a cooling system pressure test. Another way to test is a cylinder leakdown test and or do a compression test


just to answer ron... yep, weird but true..water fill cap on top of thermostat..and another on coolant resevoir... and a crazy bleeder valve.. seems this v-8 has issues with air in the coolant system


Yes this car is odd , I'm having oil getting in my coolant and my has oil cooler on it an I was told just by pass it , so how would I do that

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