Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

How to replace the thermostat of a SAAB 900 MK1

Model: Saab 900 MK 1 - Years 1979-1994
Part: Thermostat

Let's see how to replace the thermostat on a SAAB 900 MK1: we find the replacement part on eBay with the EAN code 5412571987591 at the price of 10.99 euros + shipping costs of 9.95 euros. We wait for the engine to be completely cold, and open the cap of the expansion tank to release the residual pressure. The thermostat is located in an uncomfortable position, near the distribution. We have to disconnect the coil cables, which are often fixed with a clamp and a tube. We unscrew the nut that secures the support to the tube, then partially empty the coolant tank, because it will start to leak out. Now we remove the thermostat, unscrewing the two bolts that secure the thermostat housing to the engine, then remove the cover and the thermostat. Clean the contact surfaces of the cover, removing any traces of the old gasket, place the new thermostat in its place (pay attention to the relief valve, which must be positioned upwards, as with the old one!), install the new gasket, reassemble the tube support, reconnect the electrical connector, top up the coolant in the expansion tank, start the engine and let it warm up, checking that the air is expelled from the system (check the coolant level) and check for any leaks.

Posted on 11 November 2025 by ScegliAuto

Video tutorial

Related tutorials

Disassembly of disc brake pads on Saab 900
Disassembly of disc brake pads on Saab 900
Saab 900 (1993-1998 / MK 2) Let's replace the front brake pads of a Saab 900, let's see how they change. We lift the car on a jack up to the desired height, immediately after we…
Saab 900S soft top motor disassembly guide
Saab 900S soft top motor disassembly guide
Saab 900 (1993-1998 / MK 2) Let's see in this guide the main instructions for disassembling and replacing, or repairing, the motor of the hood of the Saab 900. First we open the…
Saab 900 instrument cluster bulb replacement
Saab 900 instrument cluster bulb replacement
Saab 900 (1979-1994 / MK 1) Do we want to replace the bulbs from inside the instrument panel? Let's see how the instrument panel is removed. Unscrew the tightening screws locate…

Other guides you may be interested in

How to Replace the Rear Door Lock on an Audi A4

First, disconnect the negative cable from the battery. Now, open the door in question and lift the chrome strip at the top. Then, remove all the screws indicated in the video. You can now lift the door panel by pulling it towards you. Disconnect the connectors at the back and remove the panel. Next, you will need to remove the components shown in the video. Also, detach the weatherstrip around the door and the protective sheet. You will also need to remove the window glass by disconnecting all the connectors and bolts. Then, replace the damaged part and retrace the steps described in reverse.

Watch the video!


by ScegliAuto

More videos