89old blue

Got a question my v6 exuast smells bad like burned oil it but it doesnt smoke and no codes any ideas?? maybe a bad o2 sensor? any help would be great. Oh yeah the truck runs great 258775 miles young lol

stagger_lee

Does it smell bad inside the cab when you get on it?

89old blue

no smell in the cab but it stinks at like red lights or just idling my buddy said it smells while driving down the road at a steady speed to. i cant figure it out there is no smoke at all

904_runner

When was the last time you did a tune up? Does it have a cat?

abecedarian

sure it's coming out of the exhaust and not oil from the valve covers seeping onto the exhaust manifold(s)? It doesn't take much to make a smell.

TNRabbit

x2...

89old blue

tune up is recent plugs,wires,cap,button,new oil but no cat i gutted it a while back. its definitely the exhaust i think there is only a little bit of oil on the passenger side rear valve cover i really dont think thats it i dont know

904_runner

No cat

89old blue

oil leaking into the manifolds??? you mean like seeping in the metal?

abecedarian

oil seeping around the valve cover gasket and onto the manifold, then the heat from the manifold burns it off. if it's a bad leak you may get visible smoke but if it's not that bad, the smoke will be too faint to see but you'll smell it.

clean it off and see if the smell goes away. if it's a slow leak it'll take a while to come back.

89old blue

alright thanks ill give it a try. Do you think the o2 sensor would have anything to do with it?

abecedarian

not if it's oil burning on the manifold and not in the engine. If the O2 were going out and causing a rich fuel mixture it smells different than burning oil.

89old blue

see thats the thing me and a couple others think rich fuel and others say oil. Thanks man im gonna wash the engine and degrease it and see what happens if that doesnt do it ill turn to the o2