5 Attachment(s)
Solenoid valve, heat exchanger (heater bypass valve) - Saab 9-5 WIS
This is also known as the heater/coolant bypass valve. These instructions are for the 2005 Saab 9-5 but should be the same for all model years.
Febi: http://www.eeuroparts.com/Parts/59569/Heater-Bypass-Valve-90566947F/
Saab OEM: http://www.eeuroparts.com/Parts/7079/Heater-Bypass-Valve-90566947/
Saab part number: 90566947
Attachment 1775
To remove
The solenoid valve is located in front of the bulkhead above the water shut-off valve.
1. Open the expansion tank cap and release any overpressure. Refit the cap.
2. Place a container under the car.
3. Pinch the coolant hoses with 30 07 739 Hose pinch-off pliers.
Attachment 1769
4. Disconnect the vacuum hoses from the valve.
Note
Check that the vacuum hoses are free from cracks and leaks.
5. Unplug the connector from the solenoid valve.
6. Remove the cable tie holding together the solenoid valve and the cables.
7. Remove the hose clips from the solenoid valve.
Attachment 1771
8. Take out the water shut-off valve with the solenoid valve.
9. Drill out the rivets to the solenoid valve.
10. Change the solenoid valve.
To fit
1. Replace the rivets with screws and nuts.
Attachment 1773
2. Lubricate the hose connections on the water shut-off valve with soap and water.
3. Insert the water shut-off valve and the solenoid valve.
4. Plug in the connector.
Attachment 1772
5. Fit the coolant hoses and hose clamps.
6. Fit the vacuum hoses to the valve.
7. Remove the pinch-off pliers.
8. Fit cable ties around the solenoid valve and cables.
9. Open the expansion tank and top up with coolant to max, see Bleeding the cooling system.
10. Test pressurize the cooling system to check for leaks using 30 05 477 Cooling system tester.
3 Attachment(s)
DIY-Heater Bypass Valve replacement 2.3t/T and 3.0t
Thought I'd throw up a DIY on a common problem with the '99-'09 Saab 9-5.This is a collection of ideas I was given by members on another forum and my personal experienced.
Symptoms of a coolant/heater bypass valve going bad:
-Coolant leakage under the firewall
-Smell of burning coolant
-In some cases (like mine) a catastrophic leak that dumps the whole coolant tank
Very straightforward replacement that I completed on my '03 Arc in about 55 minutes. Total cost was about $40 for the valve from eEuroparts.com
Tools needed:
-Narrow tipped pliers
-A socket set with wrench
-Bungee cord
-bucket (to avoid coolant spillage all over your garage)
-Cutters of some sort
Procedure:
1. Place the bucket under the car under the valve.
2.Mark the top tube with a pen/marker so you know where it goes afterward
Attachment 4112
3. Undo the wire harness box
Attachment 4114
and use the bungee cord to pull it toward the front of the car so it's out of your way.
4. Clip the zip tie from the top hose and remove all of the silver hose clamps and undo the hose from the top of the valve
Attachment 4113
5. At this point the valve should slide upward out of a bracket that is attached to, I believe, the hoses behind the valve.
6. Slide the new valve into the bracket and reconnect everything. Be sure to put a new zip tie where the original one was or else the valve will flop around the may come out of the bracket.
I hope I didn't leave anything out, I did this repair awhile back. If I did, chime in!