Quite often, engine oil mixes with water, and there can be many reasons for this. Let find out why this occurs, how to determine the presence of water in the oil, and how to correct this situation. It would seem that there are several liters of oil in the engine, and what will happen if a small amount of water gets into it.
It may seem that this will only dilute the oil a little. But this is not so. The ingress of water into motor oil is, first of all, a violation of its composition, which can cause various chemical reactions.
After water enters the engine oil, it acquires the structure of an emulsion, it becomes less fluid and more dense. The exhaust on a car is normally on the underside and at a vehicles lowest point.
An exhaust will usually blow away any water. But if it becomes overwhelmed by the depth of water, or the engine stops. Water will flood in. Water can also briefly enter the exhaust from the engine, as the pistons try and expel the water, just as it would expel the spent gases from the combustion of fuel. If the water is really deep, it can enter the fuel and oil system, especially if the vehicle has been sat in water for some time:.
The order in which the water is removed from the engine is only a suggestion, but it may make it an easier process…. Part If your engine has sucked in water, there could be water in most of the pipework and air intake components. Therefore you need to break apart the air intake system make gaps to prevent more water flooding in. Where to break open undo the air intake pipework to let water out this does not drain the water from the engines cylinders :.
Once you have prevented any further water from entering the engine, we can now start to remove expel the water from the engine cylinders. Safety Precautions:. Make sure no-one is standing near the engine when it is being turned over. Water and fuel can be ejected with force causing injuries.
Please wear the appropriate PPE. Method B will eject water through a much smaller hole. Therefore the water is under greater pressure. An attempt should be made to turn the engine over by hand first, to lower the risk of causing damage to the engine, and for safety reasons.
If there are any issues, stop and remove the injectors. If you have sucked water into the engine, the exhaust will have filled with water. This is because of the depth of water and the exhaust being normally fitted on the underside of the vehicle, the lowest point other than the wheels.
In pushing the vehicle from the water, and towing it home, you will have hopefully passed a few small upward hills. This would allow the water to run out of the exhaust. There may be some water still in the exhaust, in the low lying areas.
This can get blown out of the exhaust when the engine eventually gets started, though you may get some dirt, soot and muck come out of the exhaust at the same time. In this example, the engine is being started with the air filter, turbo if fitted and intercooler if fitted , disconnected.
Do the same for all cylinders. Do your best and that should be enough. If you run the shop-vac over the plug holes, this may help get some extra water out.
Remove the spark plugs, disconnect the fuel injectors and turn the key to crank the engine. With just a few revolutions, you should be able to clear all the water through the spark plug holes. After that, change the oil and filters. Be sure to change the oil again in about miles or so just to be safe.
Drop the pan and replace the oil and filter. If the flood reached your differential, replace the differential fluid too. Some cases are simply beyond repair.
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