900 L4-1985cc 2.0L (1982)
Knock Sensor: Technical Service Bulletins
Knock Detector - Proper Installation
SUBJECT:
PROPER INSTALLATION OF BOSCH APC KNOCK SENSORS AND ROUTING OF ITS SHIELDED CABLE
ISSUE:
06/84-693
FILE IN S.I. MANUAL:
VOLUME:
I
SECTION:
2
PAGE:
165
A Bosch-brand APC knock detector and shielded cables which has been improperly installed may transmit a false signal to the APC control unit.
The following must be noted anytime the knock detector has been replaced or otherwise disturbed and whenever the shielded cable from the knock
detector to the control unit has been moved.
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Knock Sensor Mounting Bolt - Never substitute the mounting bolt for the knock detector for any other bolt.
The correct bolt is Saab P/N 80-82-968 which is a M8 x 25 mm, 8.8 graded bolt. Installing washers or other types of bolt heads is prohibited.
^
Tightening Torque of Mounting Bolt - An accurate torque wrench must always be used and the knock detector bolt subsequently tightened to 15
ft.lbs. (20 N-m).
Incorrect torque may affect the internal capacitance of the sensor.
