How to replace Exhaust Manifold on Toyota Prius?

The procedure to replace Exhaust Manifold on Toyota Prius.
Toyota Exhaust manifold replace details and diagrams.

Exhaust Manifold
REMOVAL & INSTALLATION Details are as follows:----

To avoid the danger of being burned, do not service the exhaust system while it is hot. Service should be performed only after the system cools down.
  1. Properly relieve the fuel system pressure.
  2. Disconnect the negative battery cable. Wait at least 90 seconds after disconnecting the negative battery cable to prevent possible airbag and seat belt pretensioner activation.
  3. While wearing insulating gloves, slide up the lever of the service plug grip and remove while turning the lever to the left. Be sure to insulate the service plug with insulating tape.
    Do not touch the high voltage connectors and terminals for 5 minutes after removing the service plug grip.
  4. Remove the cylinder head. 

Fig. Removal/installation of exhaust manifold insulator-1.5L hybrid engine
  1. Remove the 4 bolts and exhaust manifold insulator.
  2. Remove the 3 bolts and 2 nuts, then remove the exhaust manifold.
  3. Clean the sealing surfaces of the exhaust manifold and the cylinder head.
To install:
Fig. Exhaust manifold nut and bolt tightening sequence-1.5L hybrid engine
  1. Install a new gasket, then install the exhaust manifold.
  2. Tighten the 3 bolts and 2 nuts in the proper sequence to 20 ft. lbs. (27 Nm).
  3. Install the exhaust manifold insulator with the 4 bolts and tighten to 71 inch lbs. (8 Nm).
  4. Install the cylinder head.
  5. Install the service plug.
  6. Connect the negative battery cable.
  7. Run the engine and check for exhaust leaks.

These details will help.


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