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turbocharger, as exhaust gas pressure variations upstream the turbocharger may cause a false reading.
The sleeve should be placed at the maximum available distance from the cylinder head, and in
turbocharged engines - from the turbocharger (50 cm minimum). Otherwise, the oxygen sensor can
overheat and fail!
When the probe is installed too close to the cylinder head it may overheat and fail!
A gap of at least 50 cm should be kept.
Figure 3. The recommended dimensions of the oxygen sensor mounting sleeve.
The oxygen sensor should be put in the exhaust gas stream in such a way so that atmospheric sensor
does not affect the results of measurement (the exhaust system between the engine and measuring point
should be tight).
The oxygen sensor mounting sleeve should be mounted in the upper part of the exhaust manifold
(between 10 and 2 o'clock), as shown in Figure 3.
When the probe is mounted with the harness faced downward the probe measuring element
will be rapidly damaged by condensed water vapour!
Figure 4. The minimum mounting angle of the oxygen sensor installed in the exhaust system.
4.3 Mounting by using the exhaust gas guiding pipe
If measurements are to be made on many vehicles, it is suggested to make an exhaust gas guiding pipe
to facilitate quick mounting and dismounting of the kit. Shown below the exhaust guide allows the study of
the composition of the mixture, regardless of the circumstances under which the measurement is
performed.
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