Burning oil and you can drive for awhile and then it will die on 2001 grand am 2.4l
My last three cars have come equipped with that particular engine. Although it is very rugged, if the rings or valves are worn then you just might be burning oil. Pistons are usually equipped with rings at the top. The rings not only seal the combustion chamber, but they also scavenge any oil that happens to drip down the sides of the cylinder before the compression stroke occurs (this can happen if your valves aren't seated and sealing correctly). The oil provides lubrication for the piston so it can slide up and down the cylinder. The rings take care of the oil that is there, as noted.
If the rings are gone then two things happen. The engine doesn't seal and it leaks air. Though the cylinder may fire, the amount of fuel isn't right and the power will be way down. Attempting to drive it is like driving with an anchor attached to your car. You'll get ahead, but very slowly. The engine may also sound horrendous.
The same condition can occur if the valves aren't seated or sealing correctly. Since the engine is not sealing and is leaking, then the amount of pressure available for proper compression and proper engine operation is not available. The result is poor performance.
Like leaking rings, a worn valve or valves will not only cost you mileage, but your car's engine may sound like a cement mixer. Worn valves also can cause a flood of engine oil to cascade down the cylinder walls, overwhelming the rings, causing burning oil.
I would suggest having a compression test run to indicate which piston is bad and then having that piston serviced. To bring performance back, it is a good preventative measure to replace the rings and valves, just in case. Worn rings could indicate that the valves are about to go and vice versa.
Burning oil can also be caused if a piece of your car's head gasket is blown out. Your engine will run but, in this case, your engine will sound like a tea kettle. It will also run that way, too.
To diagnose this problem, you start with a compression test of each cylinder. If the cylinders are within specification, then the culprit is most likely a blown head gasket. To repair it, you will have to have your car's valve covers removed, exposing the gasket. Then after cleaning the area and applying either the gasketing material or a gasket itself -- with correctly dressing -- and putting the covers back. The covers should then be torqued down to specification.
Oct 18, 2014 |
Cars & Trucks