How do I drain the surge tank?
Dec 29, 2009 at 3:55 PM
1998 Oldsmobile Aurora Surge Tank Drain
1998 OLDSMOBILE AURORA
TXCOUNTRY1
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ERNEST CLARK
- ✓ASE Certified Mechanic
- 1,730 POSTS
The correct way to drain your cooling system is to unscrew the drain plugs at the bottom of your radiator. This won't get all of the coolant out of the system, but it will get most.
Now having said that, you can also just use a suction bulb (the one used to siphon gas from your fuel tank) to suck the coolant from the surge tank until it is completely empty. There will still be a bunch of coolant in your system, but the level will be below the surge tank. Then loosen the hose that exits your surge tank and let the rest of the coolant drain into a pan. It will be messy. But you won't have to drain the entire system, nor replace all of that fluid.
Once you have the hose removed, you can then unbolt the surge tank and the fluid level sensor that's located at the bottom.
Now having said that, you can also just use a suction bulb (the one used to siphon gas from your fuel tank) to suck the coolant from the surge tank until it is completely empty. There will still be a bunch of coolant in your system, but the level will be below the surge tank. Then loosen the hose that exits your surge tank and let the rest of the coolant drain into a pan. It will be messy. But you won't have to drain the entire system, nor replace all of that fluid.
Once you have the hose removed, you can then unbolt the surge tank and the fluid level sensor that's located at the bottom.
Dec 31, 2009 at 10:01 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.