When the tester is installed have a helper crank the engine an accurate reading will be attained after the engine has cranked 6 times. Install a compression tester into each individual spark plug fitting. Remove the fuel pump fuse and the wire from the ignition coil to the distributor unplug the ignition packs or individual coils for a distributor-less ignition. Worn piston rings can be detected by running a compression test on each cylinder. The classic tale tale sign of worn or leaking piston rings is a cloud of blue smoke when the engine starts or smoking while the engine is under high load. Once the oil is in the combustion chamber it will be burned off during combustion or pushed into the intake and exhaust manifolds resulting in oil coated exhaust or oil working its way to the air filter box. In some cases you may need to flush the engine multiple times to throughly clear all the oil passages and completely solve the problem.Įach piston has an oil ring that allows the piston to travel up and down without oil passing the top of the piston and entering the combustion chamber. Replace the filter and see if the problem persists.
Once the engine has been flushed drain the oil and fill it with fresh engine oil. In general you will pour the formula into the oil and run the engine for a period of time. Purchase an engine flush formula from your local parts store and follow the directions. Extremely clogged passages will cause pressure to build up and will open the opportunity for oil to push through the PCV valve and enter the air intake tube where it will drain into the air filter and filter housing. As the oil passages become clogged it becomes difficult for oil to drain from the top of the engine down into the crankcase, cause oil to build up and pool inside the top of the cylinder head. Engine oil that becomes excessively old and worn will leave deposits in the engine oil passages over time that can build up and create bigger problems. Consider the vehicles routine maintenance schedule.
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