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Disconnect the frontand rear o2 sensor electrical connectors. Separate the catalytic converter from the flex-pipe. Remove the fasteners between the catalytic converter and the exhaust manifold. Disconnect the EGR tube from the catalytic converter. Remove band from the front of the catalytic that holds it to the bracket on the front of the engine block. Remove fasteners holding exhaust manifold to head.
Depends on which one, there is an intake manifold and an exhaust manifold. The intake(normally aspirated)- you have to remove the air intake tube, throttle body, disconnect sensor, injector wires/vacuum hoses. Disconnect the fuel line to fuel rail, then you can unbolt the intake manifold. The exhaust manifold- is a little hard being against the firewall, you would have to disconnect the O2 sensor wires and exhaust pipe. I would spray the exhaust studs with penetrating lube. The upper nuts you should be able to get from the top, the bottom nuts you will need to get to from under the vehicle with a swivel and extentions.
Where is the leak coming from. Most likely you will need to replace the exhaust manifold gasket which will require removing the exhaust manifold.
I've done this. No. Remove the air breather assembly to gain access to exhaust manifold. Disconnect O2 sensor that runs through heat shield. Remove heat shield by removing 5 nuts. Disconnect catalytic converter from manifold by removing five nuts. Remove the head to manifold nuts. Remove manifold. With the right tools and a bit of luck 1 hour.
Nop,, you dont need to replace the exhaust,,, they are separate parts,,, they are most like the engine and the spark plugs,, they work toghether but are not the same piece,,, Jesus S.
basically you just unbolt from the head and then disconnect from the rest of the exhaust. Do not forget to disconnect the Oxygen sensor first. HTH. You need to remove the bolts from the end that goes into the engine itself and also the end that connects to the downpipe.
unbolt the head pipe then the manifold.
First you have to order a replacement, disconnect the negative battery cable and remove the airbox hose. Also remove the vacuum. Pry the accelerator cable from the pivot, unbolt the bracket from the intake. Then remove bracket from the brake booster. Remove bolts, disconnect tension. Unbolt collector and remove exhaust manifold. Clean the intake then you're done!
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.
If the exhaust manifold gasket is leaking the only fix is to replace it with a new one.