13 Attachment(s)
Spark plugs replacement / change - Saab 9-5 4-cylinder
Tools needed:
- ratchet with extensions
- spark plug socket
- torx head socket / driver
- feeler gauge
- screw driver
Parts and supplies needed:
Difficulty rating (scale 1 to 5):
1 - very easy. Anyone with basic mechanical skills can do this.
Time estimate: 15 - 30 minutes
Instructions
Attachment 7718
The spark plugs are on top of the engine below the Direct Ignition Cassette.
Unplug the DIC. The connector is on the right side marked by the arrow.
Attachment 7719
The red part of the connector slides out. Carefully wiggle it out with a screw driver being careful not to use too much force. It slides out easily.
Attachment 7720
Attachment 7721
Remove the 4 torx bolts from the DIC.
Attachment 7722
Lift up the DIC and put it aside.
Attachment 7723
Remove the 4 spark plugs
Attachment 7724
Check the new spark plugs for the correct gap measurement. Adjust if needed.
Fit the new spark plugs in the engine. Many spark plugs have washers that compress when the plugs are tightened. The spark plugs box should show how they should be tightened. These NGK plugs need to be hand-tightened first and an additional 1/2 to 2/3 turn with a wrench.
The Saab WIS shows a tightening torque of 28 Nm (21 lbf ft) if you want to use a torque wrench. With these plugs, tightening a 1/2 turn required medium effort. Just a little bit more and they are tight.
Attachment 8711
Attachment 7725
Attachment 7726
Add some di-electric grease to the tips of the DIC.
Attachment 7728
Put the DIC back in place.
Attachment 7727
Fit the 4 DIC bolts and tighten in a cross pattern
Plug in the DIC connector and slide in the red piece.
Attachment 7729