toyota tundra manifold removal

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2000-2004 Toyota Tundra 4.7L V-8 Two and Four Wheel Drive Installation Manual

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Filed Under (Toyota Manuals) by admin on 27-03-2012

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1. Place vehicle in a location where the floor is solid and flat, with adequate lighting. Do not attempt to work on a hot engine. Heat causes metal to expand and makes removal of fasteners difficult at best. Disconnect the battery cables from the battery. Raise the front of the vehicle to obtain adequate access to the bottom exhaust manifold flanges. Use large-base jack stands to support the vehicle. Do not rely on the jack! Block the tires to prevent the vehicle from rolling off the jack stands. 2. Spray WD-40 or some type of penetrating oil on all accessible fasteners and fittings before attempting to remove them. 3. From underneath the vehicle disconnect the exhaust system from the exhaust manifolds by unbolting the (3) bolts at the collectors. Then unbolt the driver side catalytic converter from the exhaust assembly and temporarily remove it from the vehicle. PASSENGER SIDE 4. On the passenger side remove the (4) bolts attaching the heat shields to the factory manifold. 5. Next, carefully unplug the O2 sensor from its harness. 6. Now remove the nuts attaching the factory manifold to the cylinder head. With the manifold out of the way remove the mounting studs from the cylinder head. 7. Using a small wire brush or similar instrument, clean any carbon deposits left on the head surface. Be careful not to gouge the aluminum head. 8. Transfer the O 2 sensor from the factory manifold to the new passenger side header. Apply a small amount of anti seize to the threads for the sensor before installing it in the new header. Use caution not to drop or damage the sensor, they are fragile. 9. Now you are going to install the new JBA Header, but first there is some preparation of the hardware required. Apply anti seize to the threads of the new fasteners. Install the new JBA Header using the supplied gasket and fasteners. Torque to 23 ft./lbs. DRIVER’S SIDE 10. Just like you did in step (4) remove the (4) bolts attaching the heat shields to the driver side factory mani- fold. 11. Next, carefully unplug the O2 sensor from its harness. Unbolt the dipstick bracket from the head and remove the dipstick tube. 12. Remove the nuts attaching the factory manifold to the cylinder head. With the manifold out of the way remove the mounting studs from the cylinder head. 13. Using a small wire brush or similar instrument, clean any carbon deposits left on the head surface. Be careful not to gouge the aluminum head. 14. Transfer the O 2 sensor from the factory manifold to the new driver side header. Apply a small amount of anti seize to the threads for the sensor before installing it in the new header. Use caution not to drop or damage the sensor, they are fragile. 15. As you did on the passenger side, prepare the hardware before installing the driver side header. Apply anti seize to the threads of the new fasteners. Install the new JBA Header using the supplied gasket and fasteners. Torque to 23 ft./lbs. Re-install the dipstick tube. 16. Install the driver side catalytic converter. 17. Connect the exhaust system to the new headers using hardware and gaskets supplied. Reconnect O2 sensors. 18. Check to insure adequate clearance between header and shifter cable (small cable that runs from firewall, to brace on fender well, to transmission) . More clearance can be gained by adjusting (bending) brace on fender well. 19. Recheck everything

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