How to Deal with Water in Motorcycle Engine Oil?

[DelAugust]

Understand the market information for motorcycle trade-in vehicles. Find a professional appraiser to conduct a detailed inspection of the vehicle's specific condition and issue an evaluation report. Check if the vehicle's documentation is complete and sign the trade-in agreement.

[SanAdriel]

My Yamaha also got water in it after the last car wash, and the engine oil emulsified, looking like milk. It's crucial to stop and turn off the engine immediately to prevent water from circulating with the oil throughout the engine. If you're handling it yourself, draining the emulsified oil is just the first step. You need to remove the spark plugs and use a syringe to extract the water from the cylinders, remembering to disconnect the battery cables first. If the water ingress is severe, you must disassemble the engine to clean the bearings, otherwise, water rust will cause serious damage. The most annoying part is that the crankcase ventilation tube is too low, causing it to suck in water when going through deep puddles, so it's recommended to modify it to a high-position intake. After repairs, remember to change to cheap mineral oil twice as a transition, saving the new synthetic oil for the final fill.

[AnastasiaLee]

Veteran off-road motorcycle riders all know that the first thing after waterhole surfing is to check the oil drain screw of the air filter box. Most cases involve water being forced into the air filter, especially on bikes with modified mushroom heads. Last time, my friend's KTM fell victim to this, with the engine oil bubbling in the water. It's recommended to prepare a medical syringe with a soft tube to directly draw samples from the oil dipstick hole to check for layering. When dealing with it, removing the exhaust pipe to drain water is crucial, as water remaining in the cylinder can flow back into the crankcase. Remember not to use cheap sealant to repair the intake throat; it can fall off under high temperatures and clog the oil passages. The original factory sealing gasket only costs a little over ten yuan.

[McCatherine]

When engine oil emulsifies, I directly pushed the car to the repair shop. The mechanic said it needs to be handled in layers: the upper milk-like layer can be pumped out, but the deposited water must be completely drained through the oil drain screw. The cause of water ingress might be a blocked crankcase ventilation pipe, with moisture condensing inside during rainy rides. For emergency treatment, heating the exhaust pipe can evaporate the water, but this is only suitable for short-distance rides. The most severe case is a blown cylinder head gasket, requiring the cylinder head to be resurfaced. After repair, the first oil change interval should be shortened to 300 kilometers to clean out residual water. In winter, pay special attention to fogging on the oil window, and don’t mistake it for water ingress.