Step 1 - It takes some juice to get through the shell of a quality oil
filter. The strength of this shell is very important. If the shell is too thin
or poorly joined at the base rupture can occur. Rapid loss of oil and pressure
will result in engine damage. Measure of the shell strength is referred to as
|Step 2 - Removing the outer shell reveals the inner workings of an oil
filter. Directly underneath the shell is the filter hold-down element or
spring. The spring applies just the right amount of pressure to the filter
cartridge to keep it sealed against the anti-drainback valve.
|Step 3 - The filter cartridge holds the pleated filtration material in
place. This material is what catches and keeps crud from ruining the engine.
The better the material the better the filtration. The material will
eventually clog up as it cleans. This is why it is important to regularly
change the oil filter.
|Step 4 - At the base of the filter cartridge is the anti-drainback
valve. This valve holds oil in the filter when the engine is turned off to
help provide quick lubrication to the engine when it is started once again.
|Step 5 - The pressure relief valve is shown open here. This valve is
designed to open in case of oil pressure imbalance and prevent engine oil
starvation by bypassing the filter cartridge. A severely clogged filter will
cause this valve to open making the filter itself moot.
|Step 6 - At the bottom of the oil filter is the base. This is what
holds the oil filter to the engine. Oil filter base gasket quality is
extremely important. A base gasket rupture can spell the end of an engine in
short order. Never over-tighten an oil filter, as this can cause the base
gasket to fail.
Find information on Mobil 1 Extended Performance oil filters.