Spark Plug - Updated Replacement Recommendations

87saab01

FILE IN S.I. Man


VOL. I


SEC. A-1 PG. 108
Service Information

SUBJECT: UPDATED REPLACEMENT SPARK PLUG
RECOMMENDATIONS ISSUE:

07/87-982

SUPERSEDES: 04/86-836

APPLICATION: 900 MODELS, 1979-87 9000 MODELS, 1986-87


INTRODUCTION:


Given below are the Saab spark plug recommendations for all 900 and 9000 models. Beginning with 1980 Saab models, the spark Plug service schedule calls for replacement at 30,000 mile intervals. However, under "severe service" conditions, checking of the spark plugs, re-gapping or if necessary, replacement of the plugs is recommended at 15,000 mile intervals.

"Severe service" as used in the maintenance schedule includes city driving (extensive engine idling, stop-and-go driving, and/or driving in cold climates over repeated short trips without sufficient engine warm-up) and hard driving (extensive towing and/or high speed driving).

1979 models should have the plugs replaced at 15,000 mile intervals regardless of the type of usage.



SAAB/NGK SPARK PLUG RECOMMENDATIONS FOR SERVICE REPLACEMENT (Bold = Original Equipment)
INSTALLATION INSTRUCTIONS:


1. Confirm that you are indeed installing the correct spark plug in the car. The engine should be cool when changing spark plugs to protect the threads in the aluminum cylinder head.

2. Clean the dirt at the gasket seal of the spark plug. Do not pull directly on spark plug wire to remove the wires from the plug. Instead, pull on the caps themselves, preferably with spark plug wire pliers.

A small amount of anti-seize compound may be applied to the threads, before installation.

3. Tighten the spark plug finger tight first until the gasket reaches the cylinder head. Then screw another 1/2 - 3/4 turn with a plug wrench.

If using a torque wrench, tighten to 18.5 - 21.5 ft.lbs.