TURBOCHARGER
10-12
TNV DI Service Manual
Washing Procedure
WASHING PROCEDURE
Note: Inspection, cleaning and repair of the
internal turbocharger components must
be performed by a qualified repair facility.
The washing procedure described in this section is
intended to clean the impeller on the compressor
only if the engine loses rpm, seems sluggish or has
insufficient boost pressure. The process does not
require disassembling any portion of the
turbocharger.
Since washing is quick and easy, perform this
procedure before considering replacement.
1. Start the engine and allow it to reach the
normal operating temperature.
2. While the engine is operating at normal load
(75 - 80% of maximum), slowly and evenly
spray 2 - 3 oz (60 - 90 cc) of blower wash fluid
over a period of ten to fifteen seconds into the
air inlet (Figure 10-3).
Figure 10-3
3. Continue to operate the engine under the same
load for three to four minutes.
4. While the engine is still operating at normal load
(75 - 80% of maximum), slowly and evenly
spray 2 - 3 oz (60 - 90 cc) of clean water over a
period of ten to fifteen seconds into the air inlet.
5. Continue to operate the engine under the same
load for at least ten minutes to completely dry
the air intake system and turbocharger.
6. Test the engine performance. If engine
performance has not improved, repeat steps 2
through 6. If the engine performance does not
improve after executing the washing process
three times, replace the turbocharger or have it
repaired by a qualified repair facility.
CAUTION
Avoid damage to the turbocharger or the
engine. Do not spray blower wash fluid
or water too quickly.
Use short strokes from a spray bottle to
inject blower wash fluid or water into the
turbocharger.
Spraying too much wash fluid or water,
or spraying too quickly will damage the
turbocharger.
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