Toyota 25052-20190 Exhaust Manifold Converter Sub-Assembly, No.2

Before lifting the exhaust manifold, the first thing that should be done is to disconnect the cable of the battery's negative terminal. Lift the front of the vehicle and set it on jackstands safely and then, take off the lower splash shields and front floor cover from the left side. Pry these bolts loose while being very careful not to remove the oxygen sensors by applying penetrating oil on the bolts that hold the exhaust pipe to the manifold and allowing them to soak before removal. Unfasten the exhaust neck from the manifold, undo the down exhaust manifold girders, and unsnap the connectors on the oxygen sensor. Situated in the engine compartment, it is necessary to take off only the upper heat shield from the manifold while observing that the last type of heat shield is not required to be detached. Remove the nuts/bolts and take off the manifold along with its gasket. For installation you will use a scraper to scrape the mating surface of the manifold and cylinder head cleaning it and during this process you will check for warpage if the gasket is in bad state and it is leaking. If changing a manifold only, bolt the lower heat shield onto the new one. Place a new gasket over the studs on the cylinder head and ensure the manifold is fitted Thread the mounting nuts starting with the middle one before you tighten all of them. Replace the rest of the parts in the reverse order you removed them, starting the engine to check for leakages through the exhaust.

Models from 2004 and later come with exhaust manifold/catalytic converter assemblies, while those from 2003 and earlier have separate catalytic converters. Begin by disconnecting the cable from the negative terminal of the battery. Apply penetrating oil to the exhaust manifold fasteners and let it soak. For the rear exhaust manifold removal, elevate the front of the vehicle and secure it on jackstands, then take off the engine splash shields. Remove the heated oxygen sensors from the manifold, followed by the bolts and heat shield over the exhaust manifold if applicable. Take off the exhaust manifold brace if present, and then remove the nuts that hold the exhaust pipe to the manifold. Unbolt the manifold from the cylinder head, starting from the ends and moving toward the center, and carefully slip it off the mounting studs. Inspect the manifold and fasteners for any cracks or damage, and use a scraper to eliminate old gasket material and carbon deposits from the mating surfaces. If there was a gasket leak, check for warpage on the cylinder head mounting surface using a straight edge and feeler gauge; if the clearance exceeds the limit, have the manifold resurfaced. Position a new gasket over the cylinder head studs, install the manifold, and thread the mounting nuts into place, tightening them from the center outward. Reinstall all removed parts in reverse order, using new gaskets for the exhaust pipe connections, and finally, run the engine to check for any exhaust leaks.

Pull the negative terminal off the battery and to remove the exhaust manifold heat shield, you have to unbolt this from the exhaust manifold while the bolts are loosened, apply penetrating oil on the exhaust manifold bolts to soak. Following this, take off the heated oxygen sensors of the front and rear manifolds, together with the EGR tubing from the rear manifold and cylinder head. Nuts securing front, rear exhaust manifold and manifold braces to the block; support bracket; the two nuts at the exhaust pipe/manifold joining. Pull the electrical connector from the oxygen sensor at each manifold, to do this: unfasten the exhaust manifolds from the cylinder heads, and slide them down the studs, the bolts at the rear of the exhaust manifold are extremely tight, you may need a flexible extension for your ratchet in order to get at them. Visually check manifolds and fastener for cracks and damages, it is also recommended to scrape off all old gasket material and carbon deposit from both manifolds and cylinder head. If the gasket was leaking, check the manifolds for warpage on the cylinder head mounting surface by placing a straightedge on the surface and attempting to start a feeler gauge; if the thickness is outside the limit auto mechanics should take the manifold to an automotive machine shop for surfacing. Place the new gaskets on the studs on the cylinder head, place the manifolds on top of them, and screw the nuts overriding them starting from the center nut to the outside. Replace the remaining parts in the reverse to the order they were removed, when connecting the exhaust pipes replace the gaskets and this should solve the problem of exhaust leak and last but not least, start the engine.

Replacement procedures vary based on model year and engine type. Always ensure the catalytic converter has cooled before servicing to avoid injury.

Before removing the catalytic converter, spray the nuts on the exhaust flange studs with penetrating oil. Disconnect the flange at the rear of the converter; the front of the converter is welded to the pipe and must be cut for removal. Then, remove the nuts and separate the catalytic converter from the exhaust system.

Disconnect any interfering wire clamps.

THIS DOES NOT COME WITH GASKETS

NO THE COVER IS RIGHT IN FRONT OF THIS PART

YES

yes it is

IT IS DRIVERS