Sounds like blown head gasket (through exhaust port) fill with water and start up, look under car, and see if water is coming out of the exhaust pipe)note: if head gasket is blown thru exhaust port you won't have water in the oil. it will come out of the exhaust. if this is the case then possibly can fix with (k&w block sealer or comparable block sealer) since no water in oil engine should be fine.) but follow directions to a T on block sealer if you don't it could stop up the radiator and you'd be back in the same position. also make sure you fix problem that caused it, probably bad thermostat or water pump.
SOURCE: Peugeot 405 td
The oil is probably milky or cloudy also .... I hope not. If the oil is milky or cloudy too, it is likely you have
blown head gasket
cracked cylinder head
warped cylinder head.
You could try something like Barr's stop leak radiator additive to plug up the place where oil and water are mixing, but I don't recommend this, it will be temporary if it does anygood at all.
The car can continue to run for quite a while (months) like this, but will start losing coolant, and worse, you'll be sending coolant through the lubrication system, prematurely wearing out EVERYTHING inside the engine.
If you have coolant in the oil, this will be an expensive and time consuming repair. Fingers crossed there is not coolant in the oil.
SOURCE: peugeot 405 oil blows out of the oil filler
yes their is a breather pipe but if its that bad then either its completly blocked or you need a engine rebuild.The breather is on the front of the engine with a pipe running to the air intake and the dip stick is in the top
SOURCE: engine blowing oil from oil filler cap
I had the same problem. I changed the pcv valve and checked the hose. It still did the same thing. Then I checked the metal tubing that the hose connects to and found it was full of hardened gunk. I sprayed PB Blaster into the tube let it soak for awhile. Then took an old choke cable, put it on a drill and ran it into the tube like a drain snake. It took a while of doing this over and over but eventually got it cleared out. Now, no more oil all over the engine and hood compartment.
SOURCE: peugot 405 estate diesel turbo n reg
Well not to worry as I am sure there is some water in there. The deal is oil is lighter then water so it floats to the top.
The bad news is you have a blown headgasket. It is the only place in the engine where oil and water come close to each other and are sealed. Well either that or a engine block defect which I would say would be extremely rare. 1 in 100 million rare. Headgaskets going bad are not rare but rather common.
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