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What Causes Constant Water Shortage in Diesel Engine Radiators?

1 Answers

MacRachel

07/29/25 1:46am

Reasons for constant water shortage in diesel engine radiators: 1. Water leakage: If the radiator continues to experience water shortage after refilling with coolant, consider potential leakage issues. Key inspection points include checking for damage to water pipes and plugs connecting various components, verifying radiator sealing integrity (such as gaskets), and examining whether the radiator has cracks. 2. Cylinder head gasket failure: After filling the radiator to the standard level, start the engine and observe if there are bubbles in the overflow tank. If present, this indicates a cracked engine cylinder head gasket requiring replacement. 3. Radiator cap damage: When pressure decreases in the main radiator, the vacuum valve in the radiator cap allows water from the overflow tank to flow back into the main radiator, ensuring the cooling system remains full for optimal heat dissipation. A damaged radiator cap compromises sealing performance, leading to water shortage in the radiator.

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