What to know about the Surge Tank Hose:
The cooling system is sealed when the radiator cap is tightened in place. Coolant inflates when it is heated and contracts when it is cooled. When a closed system holds fluid that experiences expansion, the excess fluid needs to go somewhere. In a cooling system, the coolant is pushed into a reservoir known as a surge tank. The surge tank hose links the tank to the radiator where the fluid comes from. When the engine is hot, the pressure builds in the radiator and some fluid pushes past the radiator cap seal to the overflow or surge tank hose. When the engine cools down, the fluid is drawn back into the system by vacuum that is created from its contraction. If the surge tank hose is cracked, broken or deteriorated, it should be changed.
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Facts to Note:
If the surge tank hose is not attached, your engine could draw air in and overheat due to an airlock.
The surge tank hose is rubber and will swell or deteriorate if exposed to oil.
How to Fix:
The coolant is drained
The faulty surge tank hose is removed
The new surge tank hose is fixed
The coolant is filled and purged of air and checked for leaks
The vehicle is started and checked for cooling system operation
The surge tank hose is rubber and may need to be changed due to cracking or deterioration. If your surge tank hose begins to leak coolant, have one of our expert mechanics replace the hose.
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Common symptoms indicating you may need to change the Surge Tank Hose:
Hose is cracked and leaking.
Surge tank hose is no longer linked to the surge tank.
Engine overheats due to an airlock.
Hose swollen due to oil contamination.
Importance of this service:
The cooling system functions as a whole. If one part doesn’t operate as it should, the whole system is compromised. A leaking surge tank hose can draw air into the engine, causing an overheating condition which is damaging to engine components. Have a leaking surge tank hose changed as soon as it is noted.