Guys, thank you all for your efforts to help. I do everything all of you stated above, engine bleeding, radiator cap check, etc. Nothing is changed. Probably, i will have the engine disassemblied by a mechanic and probably engine needs a new head gasket, and the head will be resurfaced to fit it perfectly with the new head gasket (Generally overheating bends the head, in worse cases, cylinders and other internals can be damaged), also i will have diameter of each cylinder checked and honed if necessary. You can find the photos of oil cap, as i wrote above, it is clean, no mayo or something else on in. http://img242.imagevenue.com/img.php?im ... _406lo.jpg http://img108.imagevenue.com/img.php?im ... _428lo.jpg