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Actually, I think the engine has to be removed to install it .... but why not do the spring, too? 200 1989

That reinforcing ring goes around the end of the oil pump's drive shaft. There's a notch (like half the shaft is removed) to fit into a complementary notch that turns it. Seems that the notch is a weak point prone to breaking off, and the collar you bought fits around the shaft on top of the notch to reinforce it and prevent its snapping.

As far as I know, though, you have to pull the oil pump to install this collar. And as far as I know, it's hard to do that without pulling the engine -- because it's hard [though I've heard -- not having done it myself -- but not impossible] to remove the oil pan.

If you were pulling the engine to install that collar (or any way you were going to pull the oil pump), I'd suggest also putting in a fresh oil pump, and also installing IPD's heavier-duty spring (that determines the maximum pressure) to boost oil pressure. Might as well do the "whole shebang" while you've got the opportunity!






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