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Technical
Service Bulletin 93-2R1
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In-Sump Oil Filters
In-sump oil filters replace the more traditional spin-on filter on vehicle applications where limited space is available. Smaller or more cramped engine compartments require alternative approaches to oil filter installation. This filter's location in the oil pan (sump) housing makes for quick access from the bottom of the engine.
Although the in-sump oil filter resides inside the engine, it is not a lifetime filter. In fact, it performs just like the spin-on oil filter. The operating conditions and filtration requirements are the same as traditional standards. Therefore, periodic maintenance is necessary as the filter becomes plugged.
An example of an in-sump oil filter application is the General Motors 2.5 liter in-line four cylinder engine. The figure details the filter housing accompanied with an exploded view of the filter and pan plug components. The drain plug (located on the pan plug) allows the installer to drain the oil through a small opening. Removal of the pan plug (after draining the oil) provides access to the oil filter. A special tab on the bottom end plate allows for quick removal of the filter with pliers.
Special
attention must be given to the gaskets on the filter and on the oil pan
plug assembly. First, check for all necessary gaskets on the oil filter
and in the replacement kit. Second, remove all corresponding gaskets and
debris from the sealing surfaces. Finally, properly lubricate all gaskets
and grommets with clean engine oil before installation. Following this
procedure insures proper servicing of the in-sump oil filter. Refer to
the owner's manual or filter catalog for the exact filter location and
servicing for your vehicle application.
For additional information, contact:
Filter Manufacturers
Council
P.O. Box 13966
Research Triangle Park, NC 27709-3966
Phone: 919/406-8817 Fax: 919/406-1306
www.filtercouncil.org
Administered by Motor & Equipment
Manufacturers Association
Revised April 2006
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