Contents: Removal ↓ Installation ↓
Removal
Remove the exhaust manifold on a cold engine in the following order:
- turn off the ignition and disconnect the ground wire from the battery;
- apply the parking brake and place chocks under the rear wheels;
- raise the front of the car and place it on stands;
- remove the engine compartment mudguard;
Figure 3.77. Fastening the exhaust inlet pipe to the exhaust manifold: 1 – bolts; 2 – bolts for fastening the lower part of the exhaust manifold; 3 – oxygen sensors
- apply 1.2 to the bolts (figure 3.77) and the springs that secure the exhaust pipe to the exhaust manifold, a means of facilitating their removal. After impregnating the bolts, unscrew them and separate the exhaust manifold from the intake pipe, being careful not to damage the oxygen sensors 3;
- unscrew the bolts securing the lower brackets of the exhaust manifold;
- disconnect the electrical connectors from the oxygen sensors;
- remove the upper exhaust manifold heat shield from the engine compartment. There is also a lower heat shield that is attached to the bottom of the exhaust manifold and does not need to be removed;
Figure 3.78. Location of exhaust manifold mounting nuts
- unscrew the nuts (figure 3.78) and bolts and, pulling from the cylinder head, remove the exhaust manifold with the gasket.
Installation
Perform installation in the following order:
- use a scraper to remove any remaining old gasket and soot deposits from the mating surfaces of the exhaust manifold and cylinder head;
- if a new exhaust manifold is to be installed, the lower heat shield must be moved from the old manifold to the new one;
- install a new exhaust manifold gasket onto the cylinder head in accordance with the markings and symbols on it;
- install the exhaust manifold and secure it with nuts. Tighten the nuts in several passes, starting from the center and working your way out in a spiral.
Further installation is carried out in the reverse order of removal.
Start the engine and check for exhaust leaks.