Inside A 440-Cubed 400 Part I
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The noticeable pattern on the cam lobes is from the roller lifters, which is normal. Since a roller cam is made with such hard material, it is difficult to tell if there's a problem. Look for marks on the cam from the roller lifter's wheel edge; this would indicate uneven lifter roller-to-camshaft contact. As far as the distributor gear is concerned, there was an indication of a normal wear pattern. View Related Article
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