sell your van the studs for the maniflold are going to break and you most likely will have to replace head Between the exhaust manifold and the head is the manifold gasket. Where the exhaust pipe connects to the exhaust manifold is a manifold doughnut gasket.
Where is the leak coming from. Most likely you will need to replace the exhaust manifold gasket which will require removing the exhaust manifold.
You don't, you replace or rebuild the engine.
unbolt the head pipe then the manifold.
If you can grab it with a pair of vice grips or even a pipe wrench and get it out then you could replace it. If that will not work you will have to buy an easy out and use that to remove the stud.
Unplug the sensor and unscrew it from the exhaust pipe. You'll probably need a special socket to do it without damaging the wires.
what is the cost of repair of Toyota 4runner exhaust manifold
No. which manifold gasket are you wanting to replace? Intake or exhaust?
If you do replace it correctly, it will work as designed.
The upper intake manifold must be removed for access, as well as other components. Once that is done, the fuel rail can be unbolted and the injectors removed.
If the exhaust manifold gasket is leaking the only fix is to replace it with a new one.
The 2002 Ford escape exhaust manifold will cost approximately $550 to replace. The manifold will cost $300. The labor cost will consist of approximately 4 hours of labor.