Question about 1998 Chevrolet Malibu
Have a 2000 malibu with the oil light on. I have been told by a mechanic that the cause is a valve that prevents the oil from the top of the engine running to the bottom when the engine is shut off, has stuck. There is no oil pressure in the top end of the engine. Is there a additive or something I can add to the oil in the hopes of freeing this up? It isn't worth putting a new engine in it or having it rebuilt otherwise. Any help would be appreciated. The engine runs fine right now but we shut it down as soon as the oil light came on. Thanks.
If you say the engine is in good running condition i would recommend "Seafoam" carb/injector and internal engine cleaner..you can pick a can up from autozone $10.
dont put it in a totally full oil system..wait till it needs some oil and while your at the store buy some quarts of oil and a filter because you cant leave it in the car for too long...just read instructions on can. you have to change it out. I've came across this on the internet and not one bad comment..i"ve used it myself on my motorcycle... it had a bad hesitation problem i drove it around for about 10 miles and all of the sudden it spit out what ever was clogging it up and its been running fine for the past two months. I told another friend about it... he used it on his bike and it fixed his problem too! make sure you read instructions on can.
Posted on Oct 03, 2009
Your showing two different years for this vehicle. If it is in fact a 1998, I suspect you have a 2.4L 4-cylinder engine. There is a "Cylinder Head Oil Check Valve" mounted under the cylinder head, this keeps the oil from draining back down to the oil pan when the vehicle is turned off. If the check ball gets out of it's capsule, it can cause the problems you are describing. If it's on the wrong side of the capsule and is being pushed against the opening when vehicle is running, it can cause the top of the engine to starve for oil. This is not good for the cam shafts and they will be ruined. There is no additive that will fix this. The cylinder head would have to come off to replace the check valve.
Posted on Oct 03, 2009
I got to say that I'm not aware of such a valve, but...you need to get an oil pressure gauge hooked up to see what it's doing. You might just have a faulty oil pressure sending unit. It tells your light or gauge what the pressure is, and they do go bad.
Posted on Oct 03, 2009
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Posted on Jan 02, 2017
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Mar 19, 2017 | Cars & Trucks
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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