New V to me. Engine is loud in the cabin. Also, an odor from the exhaust & a pop from the exhaust every few seconds. Seller indicated I would need to replace the exhaust manifold gaskets soon. Do this sound like that problem or something else? Thanks!
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If nothing else helps: odors can sometimes be confusing. Might not be engine oil smell. 1) If it is coming during accelerations or uphills it might be automatic tranny fluid boiling. Check tranny fluid level or condition. 2) check for cracks on exhaust manifold and union/joint between manifold/cat converter and the rest of exhaust pipe. 3) check CV boots for cracks and grease leaks/sprays-especially if CAT converter is bellow CV joint/boot.
I had the same problem with my 2005 Honda Accord. I would happen only sometime but is a distant odor I smell from inside the cabin. Older Hondas sometimes have gasket problems that leak small amounts of oil onto the exhaust manifold. Ask the mechanic to go check the valve cover gaskets. They replaced a new gasket to my car at the Honda dealer and I haven't smelled that burning odor since then. Good luck.
A modern, well maintained vehicle's exhaust is virtually orderless once the catalytic converter has fired up. What you could smelling is oil leaking from the engine, for instance, from the valve cover that then drips down onto the hot exhaust where it vaporizes. That oil vapor is then ingesting into the passenger compartment through the fresh air intakes. Try airing out the cabin and then set the ventilation controls to recirculation mode to see if the problem persists. Also, the oil vapor will only happen when the exhaust is hot. So if you don't smell it when you first start the engine, that could be confirming this cause. Look at your engine and see if you see oil and dirt oozing from the valve cover gasket. You can try to tighten the oil cover fasterners to see if it stops the leak, but the best approach would be to replace the valve cover gasket.
If there is no visible leak outside in the engine compartment that might drip onto the exhaust mainfold to get drawn into the passenger cabin, the heater core is begining to leak inside in the heater plenum inside the passenger cabin..
This is usually caused by the catalytic converter on the front of your exhaust system usually when its new and when you put your foot flat down on the accelerator. If you have this smell constantly, change your usual fuel supplier, or add an additive when you put fuel in it, quality of fuel also has an affect.
The power steering fluid leak is most likely a hose. BMWs are notorious for power steering hose leaks. On this car, replacing the power steering hose is not too hard once you get the air filter box and a few other things out of the way.
The smell is most likely the valve cover gasket leaking onto the exhaust manifold. This is another very common problem on BMWs, and is another problem that is not difficult to correct. Once you take off the cabin air filter tray, the valve cover is easy to access.
Is the exhaust loud? If not it may not be an exhaust smell. I work at an exhaust shop and we have seen a few vehicles with the same issue. More often than not, it ends up being a fluid leak (usually oil) that has flowed on to an exhaust manifold or front pipe and on start up the fluid burns off, causing the odor. Once the fluid has burned off there is no more smell. This is no to say the leak has stopped, but the odor is less noticeable when the vehicle is moving and the fluid burns off a little at a time as opposed to all at once like it does on start up. Hope this helps to steer you in the right direction, good luck!
You should have the computer scanned for fault codes. Many times the engine is running to rich and causes the catalytic converter to overheat. This will cause a rotten egg type smell.
Can you post back with a description of the odor?
Does it smell like gasoline or oil?
It also could be a carbon monoxide smell that could be very dangerous, it is a possibility that exhaust fumes are entering the cabin of the vehicle, this could lead to poisoning.
Let me know what you find and if I can assist further.