This is a home-crafted oil filter wrench for tight spaces on modern automobile engines. It is made from an old piece of 1/2 inch black iron pipe and a pipe end cap. Also used is some discarded bicycle chain. The wrench is operated by a 3/8 inch drive socket ratchet.
The chain tightens its grip on the oil filter as the pipe twists when pressure is applied to the ratchet handle.
Step 1: Commonly Available Filter Wrenches
These common wrenches do not always fit the space available on an automobile. The end cap style (center) sometimes should fit a particular filter, but does not. Sometimes no end cap wrench is available for a particular filter. The wrench described in the Instructable can be made to fit whatever filter your car uses.