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

Removing Brake Pads on Saab 900
Removing Brake Pads on Saab 900
Saab 900 (1993-1998 / MK 2) Replace the front brake pads on a Saab 900. Lift the car using a jack to the desired height, then remove the wheel with the respective bolts. Unscrew…
Guide to Removing the Hood Motor of the Saab 900S
Guide to Removing the Hood Motor of the Saab 900S
Saab 900 (1993-1998 / MK 2) This guide outlines the main instructions for removing and replacing or repairing the hood motor of the Saab 900. First, open the rear hatch of the b…
How to Replace the CV Boot on the Saab 900 DIY
How to Replace the CV Boot on the Saab 900 DIY
Saab 900 (1993-1998 / MK 2) To replace the CV boot on the Saab 900, secure the car, lift the front end, and remove the wheel on the affected side. Loosen and unscrew the CV nut …

Other guides you may be interested in

How to Reset the Central Locking of the Volkswagen Golf 4?

If the central locking system of the Volkswagen Golf 4 is not working, it is likely necessary to reset the system: to do this, open the driver's door and detach the side panel of the dashboard next to the steering wheel. Under this panel, you will find the fuses, including the one for the central locking, which is indicated in the manual as number 14. To reset the system, remove this fuse from its housing, then reinsert it or replace it with a new one of the same amperage: this will reset the central locking system.

Watch the video!


by ScegliAuto

More videos