Is it necessary to replace the connecting rod after water immersion in the engine?
4 Answers
In such cases, as long as there is no secondary startup, it is generally not necessary to replace the connecting rod. Simply removing the spark plugs and draining the water from inside the engine is sufficient. Below are some potential hazards associated with water-damaged vehicles: Damage to computer integrated circuits: These circuits can oxidize due to immersion, often requiring inspection and replacement; otherwise, the vehicle may not operate properly. Since many electronic components cannot be opened at once, they may appear fine during repairs but could develop faults during later use. These issues mean that some 'water-damaged vehicles' may experience malfunctions even after repairs. Damage to the engine: Water immersion can harm the vehicle's internal electronic control systems. The engine is particularly vulnerable; after water immersion, never attempt to start or turn over the engine, as this can cause severe deformation of the connecting rod. Additionally, interior components like carpets and seats may deform, become rough, or develop odors and bacterial growth due to prolonged soaking.
Whether the engine connecting rod needs to be replaced after wading depends on the specific situation. If the connecting rod is severely bent, it must be replaced; otherwise, it may break directly during engine operation, leading to more expensive repairs or accidents. I have handled similar cases before—a car didn't stall after wading but the engine shook. An endoscopic inspection revealed slight deformation of the connecting rod, and upon disassembling the engine, the situation was found to be worse, necessitating a full replacement. Because water has poor compressibility, the instantaneous pressure is high, making the connecting rod most susceptible to damage. If not replaced, it could lead to a short lifespan and even cylinder explosion, costing more to repair other components. My advice is to stop the car immediately after wading and avoid restarting it. Have a professional repair shop inspect the condition of the connecting rod. If it's severely bent, don’t hesitate to replace it—safety first.
Regarding the issue of engine connecting rods after water submersion, let me discuss. From a technical perspective, since water cannot be compressed, the connecting rods are prone to bending or breaking after water ingress. However, replacement isn't always necessary—damage extent must be evaluated. Last time my car went through water, I tried inspecting the connecting rods myself and found slight bending that could be corrected with professional tools, though the high risk still recommends replacement. This involves cost and effort: engine disassembly is expensive, while new connecting rods cost a few hundred but save future trouble. Remember not to restart the engine after water ingress, as this worsens rod damage. Repair shops typically use diagnostic tools to check cylinder pressure and determine if replacement is mandatory. Ultimately, the decision should prioritize safety.
After wading, connecting rod damage is common. My opinion is that a thorough inspection is necessary before deciding whether to replace it. Minor bending of the rod might be repairable, but if the bending exceeds 0.1 mm, replacement is required; otherwise, there's a high risk of fracture during engine operation. I've handled similar cases by measuring cylinder pressure and using an endoscope for observation to make decisions. Ignoring replacement could lead to greater costs if the engine is scrapped. The key during wading is to stop the vehicle promptly and avoid restarting the engine to prevent further damage. Based on experience, replacement is the only option for severe bending, while minor cases can be repaired, but professional assessment is more reliable. Evaluating under safe conditions is the most prudent approach.
