1996 Nissan Maxima exhaust replacements

Take it to a muffler shop-that mechanic must have a tin ear. I thought my Sentra had a small exhaust leak (slightly loud exhaust noise) from a previously fixed exhaust connection. But a muffler shop guy showed me I had a rusted out catalytic converter. I would suspect your flex pipe may still be leaking.

They used threaded ends that screw into the exhaust pipe fitting. You should not need to replace more than one of them.

You can cut out the Y pipe and replace it with a flex pipe from parts store, then clamp each end of the flex pipe, the pipe diameter will be 1-7/8 or 2 inch, also for the pipe replacement piece would work from a sunfire or cavalier from 1995 and up, might need to replace the muffler strap too. as it can break from rusting, if not already rusted and broken.

the flex pipe in the exhaust is probally broken or maybe a crack in the manifold.

Take it to an independent (not a chain) muffler shop and have it replaced. I'm guessing around $200. Also, have the engine mounts checked. If they're worn, the engine rocks too much and breaks the flex pipe.

You can change the entire section of exhaust pipe that the flex pipe is in. It's usually bolted to the catalytic converter, on the back end, and to the exhaust manifold at the front end. It's just a matter of unbolting it and bolting on the new section of exhaust with new gaskets. You could also go to a muffler shop and have them cut out the old flex pipe and weld in a new piece of flex pipe in it's place. It's for you to decide which option is best for you, and for your wallet.

if it is at the flex pipe, it is difficult to just get a patch.....i would just replace that section of the pipe, or worst case scenario, get a whole new exahust, but get the exhaust shop to use your catalytic converter and muffler, if there are no problems with them, this will cost you heaps

Here is a diagram of the 1.8 exhaust from the service manual, you can obtain a full factory service manual for relatively cheap from Promanuals.net here.

check your exhaust system and your muffler. a noisy fuel pump doesn't make sense, especially because a new one didn't change anything. if your muffler even has a tiny hole in it, it would make immense amounts of noise. the fastest way to check it (and you have to be very careful here) is to cover the exhaust pipe entirely with your hand RIGHT after starting the car (so it's still cold) if your hand is pushed off by a lot of force building up, then your exhaust is fine, if your hand can stay there with no resistance, and the noise gets louder, there is a leak in the exhaust system

your going to have to be more specific but there is a such thing as a flex pipe its rite under where the driver seat is under the car it connects to the exhaust they usually go back and the car gets really noisy if you look under the car they look like a pipe thats weaved metal like a basket but its a flex pipe.