leezh

Hello, Do you anyone has any experience to replace the exhaust pipe gasket for 2012 rx350? the position sees attachment, red circle one. Thanks

Clutchless

Is it leaking there? Or rusted enough that the gaskets rusted or fell off? Or did you hit something? There is usually less rust the closer you get to the engine as the pipe is hotter and burns off water faster.

The usual problem with old exhaust systems being repaired is rust everywhere that makes bolts & nuts almost impossible to remove and that weakens the pipes so they may break while attempting to remove them. Or the pipes are already rusted out. This is a job best attempted with the vehicle on a lift so you can have adequate leverage to attack the problem and see everything. The bolts probably need to be removed with a grinder. You may have other unseen damage farther down the exhaust system.
I would take it to a specialty or custom exhaust shop.

salimshah

You already got a good advice from Clutches.

If you want to proceed on your own, the thing to watch out other than the rust/weld-action of fasteners, you need to understand that a space of 1/4" or more needs to be created. The tail end of the exhaust can usually be pushed back [it is on flex suspension], but the piece that is going to give you the trouble is the "Y" [#4]. Most likely you will not be able to push the pipe going to the engine on both banks. I would plan on separating the other flange of the "Y" that is going to the second bank as well. So order 2 gaskets and be prepared to install new nuts and bolts for both engine bank faces of flanges of item 4. I am assuming you will not touch the exhaust end of item 4.

Salim
If you have done plumbing you will grasp what I am talking about real quick.