Removing
Remove the exhaust manifold on a cold engine in the following order:
- turn off the ignition and disconnect the wire «masses» from the storage battery;
- apply the parking brake and chock the rear wheels;
- raise the front of the car and place it on supports;
- remove the mudguard of the engine compartment;
Pic. 3.77. Mounting the exhaust pipe to the exhaust manifold: 1 - bolts; 2 – bolts of fastening of the bottom part of a final collector; 3 - oxygen sensors
- apply on bolts 1.2 (pic. 3.77) and springs for fastening the exhaust pipe to the exhaust manifold means to facilitate their unscrewing. After impregnating the bolts, unscrew them and separate the intake exhaust pipe from the manifold, while being careful not to damage the oxygen sensors 3;
- turn out bolts of fastening of the bottom curly brackets of a final collector;
- disconnect electrical connectors from oxygen sensors;
- from the engine compartment, remove the upper exhaust manifold heat shield. There is also a lower heat shield that is attached to the bottom of the exhaust manifold and does not need to be removed;
Pic. 3.78. Location of the exhaust manifold mounting nuts
- remove the nuts (pic. 3.78) and bolts and, pulling from the cylinder head, remove the exhaust manifold with gasket.
Installation
Install in the following order:
- use a scraper to remove the remnants of the 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, it must be moved from the old manifold to the new lower heat shield;
- install a new exhaust manifold gasket on the cylinder head in accordance with the inscriptions and signs on it;
- Install the exhaust manifold and secure with nuts. Tighten the nuts in several passes, starting at the center and working out in a spiral.
Further installation is carried out in the reverse order of removal.
Start the engine and check for exhaust gas leaks.