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If it is a cartridge style filter the socket size is 22MM. Remove the plate style cover a feww turns until all the oil is drained, you will then be able to remove the cover the rest of the way and see the bottom of the cartridge. in the bottom of the center of the cartridge there is a tab sticking down, grab with a pair of pliers, twist and pull down and be prepared to be cover with splashed oil as the cartridge comes out.

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16y ago
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Q: What tool is needed to remove the oil drain plug on a 1988 Pontiac fiero?
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