Audi Q7 2007
!
6-cylinder TDI engine (3.0 ltr. 4-valve common rail), mechanics 01.2006
1 Removing and installing parts of lubrication system
157
6
–
Screw oil pressure switch -2- into oil pressure tester
-V.A.G 1342-.
Checking oil pressure switch
–
Connect brown wire -1- of oil pressure tester to earth (“–
”).
–
Connect voltage tester -V.A.G 1527 B- with test leads
from auxiliary measuring set -V.A.G 1594 C- to oil pres-
sure switch and battery positive (“+”).
•
LED should not light up.
If LED lights up now:
–
Renew oil pressure switch.
–
Start engine.
Observe tester and LED while starting, as switching point of
oil pressure switch may already be exceeded when starting.
•
Test lamp should light up at 0.7 ... 1.1 bar.
If LED does not light up:
–
Renew oil pressure switch.
Checking oil pressure
–
Start engine.
•
Minimum oil pressure at idling speed: 1.8 bar
•
Minimum oil pressure at 2000 rpm: 4.0 bar
The pressure relief valve or oil pump is defective if the speci-
fications are not attained.
–
Renew oil pump
⇒
page 142
.
Assembling
–
Install oil pressure switch -F1-
⇒
page 154
.
1.13
Engine oil
Viscosity grades and oil specifications
⇒
Maintenance;
Booklet 803
1.14
Checking oil level
Procedure
•
Engine oil temperature at least 60
°
C.
•
Vehicle must be level (horizontal)
•
Wait a few minutes after switching off the engine to allow
the oil to flow back into the sump.
–
Pull out the dipstick, wipe off with a clean cloth and insert
it again as far as it will go.
Note
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