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of the coolant hose. Therefore, engine hoses that are subjected to any extended amount of stop-and-go, or engille idle, show earlier and more severe electrochemical damage
The "Squeeze Test"
The best way to check coolant hose for the effects of ECD is to squeeze the hose near the clamps or connectors using the following procedures recommended by Gates:
1. Make sure the engine is cool.
2. Use fingers and thumb to check for weakness, not the whole hand.
3. Squeeze near the connectors. ECD occurs within two inches of the ends or the hose—not in the middle.
4. Check for any difference in the feel between the middle and ends of the hose. "Gaps," or "channels," can be left along the length of the hose tube where it has been weakened by ECD.
5. If the ends are soft and feel mushy, chances, are the hose is under attack by ECD. To avoid breakdowns, replacement is recommended.
Replace four-year-old hoses
A replacement interval of four years ror all coolant carrying hoses — especially the upper radiator, bypass and heater hoses — can help prevent unexpected failure from ECD.
The ihcidence of hose failure increases
94.1%