check your coolant levels & if car overheating, might well be the cylinder head gasket is away.
Where is the leak coming from. Most likely you will need to replace the exhaust manifold gasket which will require removing the exhaust manifold.
it's in the down pipe coming from your exhaust manifold. you will have to remove the heat shield from the exhaust manifold to access it
The oxygen sensor is located in the exhaust manifold before the catalytic convertor. If you look down between the radiator and the exhaust manifold a few inches before the exhaust pipe connects to the exhaust manifold you will see the Oxygen sensor. The sensor will have 2 wires coming from it and it kinda looks like a sparkplug stuck into the exhaust manifold. There is 2 nuts that hold the oxygen sensor into the exhaust manifold.
By "exhaust manifold sensor" do you mean the O2 or oxygen sensor? The only sensor I know of on a exaust manifold is the O2 sensor and if you follow the manifold you will see 2 sensors sticking out they will have (usually) green wires coming from them
If there is oil coming from the exhaust manifold it generally indicates a bad valve stem seal or a worn out engine. (too much crankcase pressure)
The egr valve should be coming off of the exhaust manifold.
it sounds like your exhaust manifold gaskets are leaking or you half a hole in your Y pipe
no. the exhaust manifold is just the tubes coming off block or heads. the catalytic converter should be a separate piece that connects to the exhaust manifold that burns the unburned fuel to keep it from releasing those fumes into the air.
Look on the exhaust pipe coming off the manifold.
it is on the exhaust manifold just before the y pipe on the and the manifold meet can't miss it has 2 wires coming out of it and kind of looks like a spark plug on the end
If you aren't hearing a lot of exhaust noise and you're just getting smoke, you have either an oil leak or antifreeze leak that is getting on the exhaust manifold. If you're getting oil on the manifold you have a fire hazard and should take care of the problem immediately. If you hear exhaust gas leaking around the manifold you need to replace the gasket or possibly the manifold is cracked and you need to replace the manifold.
back of the intake manifold, middleof the engine. lets gasses from exhaust back into the intake. will be a tube coming off it to the passenger side going to the exhaust manifold