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With the V6 Buick, the oil pump is integrated into the timing cover. As a result, all the lube feed and supply lines pass through the timing cover. Like all Buick engines before it, the Buick V6 is notoriously weak in the oiling department, so it pays to blueprint the timing cover in key areas. All of Merkel's engines go out the door with key mods to improve oiling. The feed and return passages in the block are larger than those in the timing cover (shown) so the timing cover holes are enlarged to match the block. A booster plate is also added to improve oil volume and the pump is blueprinted to reduce flow restrictions. View Related Article
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