Question about Briggs & Stratton Garden
Engine smokes and uses oil even after cleaning blowby valve. Are valves allowing oil to get into cylinder? Whers do I start please?
Sounds like it is the valve seats. However normally it will stop smoking after is runs for a while if that is the problem. Does it run good? Because if it isn't the valve seats then it is the rings. Or a big scratch in the cylinder wall. Then most of the time it will loose compression. If it isn't smoking real bad then you can get an additive to put with your oil that will make it stop, maybe? It is about ten dollars and you can get is at most autoparts stores. It will just take a couple ounces of it. Follow the directions for how many qts of oil you have. After you change the oil in the motor take a magnet and run it through the oil and see if there is pieces of the rings in it.
Posted on Jul 12, 2010
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Posted on Jan 02, 2017
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The most common cause of blue exhaust smoke is oil leaking past engine seals and into the cylinders where it then mixes and burns with the fuel. This is most frequently seen in older or high mileage cars with worn seals and gaskets. It only requires a very small amount of oil leaking into the cylinders to cause excessive blue exhaust smoke.
Blue exhaust smoke only at start-up can indicate worn piston seals or damaged or worn valve guides which may also cause a rattling noise. An external engine oil leak can drip onto hot engine and exhaust parts causing what appears to be blue exhaust smoke. Other possible causes of blue exhaust smoke include: piston wear, worn valve seals, a dirty or non-functioning PCV valve, worn piston rings, an intake manifold gasket leak, worn engine oil seals and possibly even head gasket failure.
Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs. In addition, a reduction in power and oil loss can be indicators that the blue exhaust smoke is caused by an internal engine oil leak. Internal engine oil leaks can also allow fuel to mix with the oil in the crankcase which will degrade the oil and prevent it from adequately protecting the engine.
Operating a car with a severely dirty oil filter, air filter or improperly functioning PCV valve can also sometimes result in engine oil blow-by, oil loss and blue exhaust smoke. Periodically checking the engine oil level with the oil dip stick will indicate if there is excessive oil consumption. Higher viscosity engine oil can sometimes temporarily reduce the amount of blow-by; however, this is not generally recommended. Excessive blue exhaust smoke indicates a possible internal engine oil leak that should be inspected by an ASE certified mechanic.
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