Knock Detector - Revised

87saab04

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.