1.0 Exhaust system. Cars with a gasoline engine
1 - manifold gasket
2 - cable harness clamp on the oil pan
3 - lambda probe. Tightening torque 55 Nm. Lubricate the threads with heat-resistant grease
4 - catalyst
5 - middle pipe
6 - bolt
7 - pipe suspension bracket
8 - rubber suspension pad
9 - nut with collar. Tightening torque 40 Nm. The nut is self-locking and must be replaced with a new one after each dismantling
10 - exhaust manifold
11 - an arm of a suspension bracket of a reception pipe on a transmission
12 - flange connection with gasket
13 - connecting bolt. Tightening torque 25 Nm
14 - main muffler
15 - exhaust pipe
Depending on the type of engine, gasoline-powered vehicles are equipped with one or two lambda probes, which are installed before and after the catalytic converter.
Diesel vehicles are equipped with two catalytic converters (see illustration 1.0a).
1.0а Exhaust system. Diesel vehicles
1 - flange for fastening the exhaust system to the turbocharger
2 - front catalyst
3 - connecting clamp
4 - additional catalyst
5 - main muffler
6 - bolt 8x16
7 - bolt 8x40
8 - downpipe
9 - middle pipe
10 - exhaust pipe
In case of repair, all parts of the exhaust system can be changed individually.
Servicing vehicles with a catalyst
To avoid damage to the catalyst, the following recommendations must be strictly followed:
Cars with a gasoline engine
A) Refuel with unleaded gasoline only.
b) Force start the engine by pushing or towing only once and for a distance of no more than 50 meters. It is recommended to use a booster battery in this case, because during towing, unburned fuel enters the catalyst and, if it ignites, can cause overheating and destruction of the catalyst. If the engine is warm, then forced start from a push or towing is generally unacceptable.
V) If the engine is difficult to start, do not operate the starter for too long. When starting the engine, fuel is continuously injected. In such cases, you need to find and eliminate the cause of the malfunction.
G) Keep an eye on the amount of fuel in the tank and do not let it «devastation».
d) If misfires are observed, high engine speeds must be avoided and the fault repaired immediately.
e) Install only the types of spark plugs recommended by the vehicle manufacturer.
and) Do not perform spark tests without being connected to a solid «mass» (-).
h) Do not compare cylinders (balance test) by turning off the ignition in the combustion chamber of one cylinder. With such a shutdown, including with the help of a tester to check the operation of the engine, unburned fuel enters the catalyst.
Vehicles with petrol and diesel engines
And) When filling engine oil, pay special attention to ensure that the maximum oil level mark on the dipstick is not exceeded. Excess oil due to incomplete combustion enters the catalyst and can damage the precious metal or completely destroy the catalyst.
To) Do not apply underbody corrosion protection to parts of the exhaust system.
l) Do not modify the heat shields of the exhaust system.
m) Do not park your vehicle over dry leaves or grass. The exhaust system near the catalytic converter is very hot and radiates heat even after the engine has been switched off.