Spring Maintenance

Anyone who owns an old car knows that, after a while, certain components need replacing. That's what most of this spring consisted of. Last year, I had also developed a cold starting issue. I theorized the fuel system or ignition system was in need of work. In this entry, we'll replace the following:

1. Coolant sensor
2. Fan switch
3. Distributor cap and rotor
4. Fuel Filter

Each of these repairs is a simple fix- consisting of removing the original part and reinstalling it. They're all easy to access, making for a productive afternoon of repairs and maintenance.

1. Fan switch: An easy repair, located on the left side of radiator, if facing it from the driver's seat. Here's how to replace it:

A. Remove the two connecting wires.

B: The most difficult task is removing it, as you'll need an adjustable wrench. Give it a few turns until the switch loosens, then remove it by hand.

C: Use an aluminum baking pan to catch any excess coolant that falls out. 

D: Install the new switch. Make sure you finger tighten first, then use your adjustable wrench to tighten it into the radiator. Reconnect the wires.

2. Coolant Temperature Sensor: Super easy - Simply locate the temp sensor. It should be right below the thermostat housing with a wire attached to the front. Remove the wire, unscrew the sensor, and reinstall the new one, connecting the wire once you're done. 

3. Distributor Cap and Rotor: A relatively easy job to do. Before you replace your cap, make note of each spark plug wire connection on the cap itself. Next, remove the retaining clips on the top and bottom sides of the cap. Reconnect each plug to its corresponding location on the new plug. 

Below the cap is the rotor. Remove the old rotor, and place the new one in its correct spot. Then, place the new cap with wires attached on top of the rotor, and squeeze the clips back into place. I recommend using a flathead screwdriver to help you.

Once you're done, turn the car over and see if you start properly! Note: I recommend buying Bosch made parts for this job. They are an OE supplier for Saab, so if Bosch are an option for parts, use them.

4. Fuel Filter: This job is best completed on a near-empty fuel tank. The fuel filter is located right below the coolant overflow tank on the lefthand side of the engine bay. It is logically placed very close to the fuel injection system. On later 900s, it is inconveniently located behind the rear axle. 

Start by undoing the connecting fuel lines to each end of the fuel filter. I recommend holding the filter with a vice grip, and using a ratchet to undo the bolt connecting the fuel line to the filter. Follow the arrow, and make sure it's pointing towards the gas tank. 

Pull the old fuel filter out of its housing clip, and place the new one in the same spot. Make sure you use the crusher washers that come with the new filter between the fuel line connecting banjo bolts. Rescrew each end back to the new filter. Now you should have much better fuel flow!