Oil gets on top of piston locking engine.pull spark plug, turn engine over several times clearing oil out. reinstall plug, after a couple pulls on rope same thing, oil on top of piston. oil has to be chain oil but how is it getting on top of piston?
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First of all, it would be helpful to define what you mean by excessive. How much oil is it using? Do you still have most or all of your power? Is it smoking? Is there oil on the ground under the car after you park for a while?
High mileage engines often have leaky gaskets (oil on the ground), but they also tend to burn oil. Valve guides wear out, and oil leaks into the firing chamber because of that. Usually, when this happens, you will have a problem with fouling spark plugs and lack of power. The piston rings also wear out, letting oil get by and into the firing chamber. Excessive crankcase pressure due to "blow-by," where combustion pressure is released by worn out rings into the crankcase, which pushes oil into the air intake. This doesn't foul the spark plugs as severely, but also causes smoke out the exhaust.
Finally, if the engine has not been serviced for a long time, there are many things that can cause or allow oil to go where it shouldn't, usually into the combustion chamber and out the exhaust.
There is an excellent product available from Rislone that can help in some cases, and with amazing results. However, if your engine is worn out, it may need to be rebuilt or replaced.
Pull out the spark plugs and check for oil on the spark plugs. If you do have oil on the spark plugs, the valve seals are leaking. The top of the engine has to be taken apart to repair it. If this is not the problem, then the oil rings on the pistons are worn out and leaking oil into the combustion chamber. This is a very expensive repair.
A vapour lock will not stop and engine from turning over but a hydraulic lock will . The difference is vapour compresses , fuel doesn't. Remove the spark plugs and wind the engine over to clear fuel that has leaked into the combustion chambers .
Hi Ahuerta, Just about all the vehicles you see on the road work on the principal of what is called a four stroke cycle. When the piston is pulled down during the first stroke, the crankshaft rotates and is joined to the camshaft by a timing belt, chain or gears. As the shafts rotate the camshaft presses down and opens the intake valve(s) and a mixture of fuel and air is drawn into the space on top of the piston called the combustion chamber. The valve closes as the engine continues to rotate and the piston begins to travel upwards, squeezing the mixture until it reaches almost the top of the tube called the cylinder. The combustion chamber is closed and sealed and the spark plug is sparked which causes the fuel mixture to explode, forcing the piston downwards until it reaches the bottom of its travel and begins coming up again. This time the cam shaft opens the exhaust valve, letting out the rubbish left over from when the explosion happened. So as you can now understand the spark plugs work all the time the engine does. Take your vehicle for a diagnostic scan and let your mechanic find out what the problems are. Regards John
A spark plug shorted by excessive oil entering the combustion chamber is shown below. This is often caused by piston rings or cylinder walls that are badly worn. Oil may also be pulled into the chamber because of excessive clearance in the valve stem guides, or badly worn valve stem seals.
If the PCV valve is plugged or inoperative, it can cause a buildup of crankcase pressure. This condition can force oil and oil vapors past the rings and valve guides into the combustion chamber.
Would it give you any more room if you removed the front wheels and worked through the wheel well? You would need an extra long extension to go on your ratchet. The check engine light is probably caused by the rough idle. If you had trouble getting the plug wires off due to the cramped space, you may not have gotten them back on good, which would cause a miss and a rough idle. I have noticed that many times, when I install a new set of spark plugs, the engine will tend to have a slight miss at idle. This usually happens to engines that have not been tuned up in years. I always attributed it to combustion chamber deposits being burned of by the more complete combustion of the air/fuel mixture from the new plugs. It usually goes away after a couple hundred miles of driving, especially at highway speeds. One thing I like to do to an engine that has high mileage is run a can of Marvel Mystery Oil through the intake at very high idle. You would have to use a small vacuum hose inserted into the can and hook it up to a vacuum source so the engine can pull the oil in through the hose. It it was a carbureted engine, you would just pour it slowly into the carb. If you do this, ve sure the vehicle is outside with plenty of ventilation. Once the Marvel Oil starts burning in the combustionchambers, there will be lots of white smoke pouring from the exhaust pipe. This is normal, and it will clear up once the oil is no longer being fed to the engine. The Marvel Oil will clean all the deposits off the combustion chambers and also the top of the pistons.
Remove the spark plug and see if the flywheel will turn. If it does, then there is excess fuel in the combustion chamber--install the starter and pull it through vigorously several times to expel the raw fuel. If it does not turn, then suspect that the engine has seized due to insufficient or no oil premixed into the fuel. Remove the muffler and inspect the piston, ring(s), and cylinder for excess scoring. The repair is to replace these parts--an expensive process even if you perform the labor. Any existing warranty will not cover this problem. Hope this helps!
If it is gas motor it may have collected dirt (burnt oil) in spark plug(s).
When the oil level is OK, take the spark plug(s) out and with open hole try to turn the motor 10 - 50 turns to clean the combustion chamber(s) from any oil residues. Than replace the spark plug and try to crank it again.
Storing a chain saw for longer than 30 days requires storage maintenance. Unless the storage instructions are followed, fuel remaining in the carburetor will evaporate, leaving gum-like deposits. This could lead to difficult starting and result in costly repairs. Never store a chain saw for longer than 30 days without performing the following procedures:
Remove the fuel tank cap slowly to release any pressure in tank. Carefullydrain the fuel tank.Start the engine and let it run until the unit stops to remove fuel from carburetor. Allow the engine to cool (approximately 5 minutes). Using a spark plug wrench, remove the spark plug.
Pour 1 teaspoon of clean 2-cycle oil into the combustion chamber. Pull starter rope slowly several times to coat internal components. Replace spark plug.
Store the unit in a dry place and away from possible sources of ignition such as a furnace, gas hot water heater, gas dryer,etc.When removing the unit from storage, be sure to perform the following procedures:Remove spark plug. Pull starter rope briskly to clear excess oil from combustion chamber.Clean and gap spark plug or install a new spark plug with proper gap.Prepare unit for operation.Fill fuel tank with proper fuel/oil mixture. This will help.Thanks,please keep updated. please do rate the solution positively .thank you for using fixya