900 L4-1985cc 2.0L SOHC Turbo VIN S FI (1984)
Knock Sensor: Technical Service Bulletins
Knock Detector - Revised
FILE IN S.I. Man VOL. I
SEC. A-3 PG. 106
Service Information
SUBJECT:
MODIFIED KNOCK DETECTOR ISSUE: 05/87-967
APPLICATION: 900 MODELS WITH KNOCK DETECTORS, EZK IGNITION & APC SYSTEMS, 1983-
New Type Knock Detector
A new knock detector with improved mechanical properties has been introduced into production from Engine No. G122319.
The new knock detector P/N 75-68-801 replaces the earlier type and can be distinguished by being 3.5 mm taller and is secured by a longer bolt.
Bolt (30 mm)
81-25-197
When fitting a new knock detector to earlier cars, the longer bolt (81-25- 197) must be installed as well.
Tightening torque
14.7 ft.lbs.
Early Type Knock Detector
A new bolt has also been introduced for the early type knock detector. The bolt is the same length as before but is treated with a special blue coating that
acts as a thread lock.
Bolt (27 mm)
75-62-168
If the early type detector is disturbed for any reason always install a new bolt. Use the torque specification given below.
Tightening torque
10.3 ft.lbs.