In my Peugeot 406, manufacture year 2001, engine 1.8, very recently I had overheating issue due to thermostat valve block. I have replace thermostat valve and now I can see engine oil mix with radiator coolant. When I check radiator I can see milky oil in radiator.
I try to fix this without replacing cylinder-head-gasket using "steel seal head gasket sealer" but I realize it only seal radiator to engine leaks. (radiator coolant leaks to engine.) but I have engine oil comes to radiator.
is there any sealant to stop engine oil leak to radiator or do I need to replace cylinder-head-gasket?
plz help me. Thanks.