Only if the mechanic is abusive and does not follow proper procedure
I don't know if this is your trouble, but I had the same situation or similar.It was explained to me that the exhaust manifold on maxima's have a tendency to heat up and warp; separating them from the engine exhaust ports and the bolt breaks. I think you need to replace the exhaust manifold. It is a bit expensive having a professional do the job. Well worth the cash. At least to me.
sounds like you use a bad mechanic a good mechanic would replace a cracked exhaust manifold to start with if you can smell gas,there is obvioulsy a leak in the fuel system. this needs to be found as it is a fire hazard
On a 1989 Oldsmobile 88, the oxygen sensor is typically located in the exhaust system, specifically on the exhaust manifold or the exhaust pipe just downstream from the manifold. It is often found near the front of the vehicle, close to the engine. If you're having trouble locating it, consult the vehicle's service manual for specific details related to your model.
The oxygen sensor on a 1993 Oldsmobile 88 Royale is typically located in the exhaust system, either in the exhaust manifold or just downstream in the exhaust pipe. For this model, you may find it near the engine, close to where the exhaust exits the manifold. It is usually a cylindrical component screwed into the exhaust system, with a wiring harness connected to it. If you're having trouble locating it, consulting a repair manual specific to the vehicle can provide additional guidance.
Having Her Gown Fitted - 1903 was released on: USA: December 1903
Having an exhaust fan in the bathroom is important because it helps remove excess moisture and odors, which can prevent mold growth and improve air quality. Without an exhaust fan, the bathroom can become humid and mold may develop, leading to potential health issues and damage to the walls and ceiling.
On a 1986 Oldsmobile Toronado, the oxygen sensor is typically located in the exhaust system, specifically in the exhaust manifold or just downstream of it in the exhaust pipe. It may be mounted on the driver's side, near the engine. If you're having difficulty locating it, consulting a repair manual specific to that model can provide a detailed diagram and additional guidance.
They are before or after your precats depending on year and model. 91-93 have a single O2 sensor in the exhaust manifold, as they have no precats. I believe the 94-95 have 1 sensor before the precat, and one after to monitor the O2 in the exhaust gas. 96+ have 4 O2 sensors. Two before the precats, one on the front, one on the rear, while having two after the precats, on the front bank, and the rear bank. The precats are located after the exhaust manifold, directly before the downpipe.
I have a 1990 Pontiac sunbird and i was only able to find one, it was behind the exhaust manifold on the block. I myself am having problems finding the other. I hope this helps.
The advantages of having dual exhaust, if it is a true dual exhaust, include increased gas mileage, cooler engine temperature, and more engine horsepower. However, if it is not a true dual exhaust, it doesn't matter how many exhaust ports there are, there will be no advantage.
On a 1986 Dodge Power Wagon, the oxygen sensor is typically located on the exhaust manifold or just downstream in the exhaust system, often before the catalytic converter. It is usually threaded into the exhaust pipe and can be identified by its wire connector. If you're having trouble locating it, checking the service manual for your specific engine configuration can provide further guidance.
The rattle might be a loose heat shield but the loud exhaust can only be a hole somewhere. start at the manifold an work your way back listening and feeling for leaks.