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1985 Chevrolet Caprice Parts Questions & Experts Answers
Q: How to remove and inspect the oil filter and oil pump in V6 engine on 1985 Chevrolet Caprice?
A: Unscrew and remove the oil filter, then take out the screws attaching the oil pump cover assembly to the timing chain cover, followed by removing the cover assembly and sliding out the oil pump gear. Clean the gears with an appropriate solution and inspect them for wear or scoring, replacing any unserviceable gears with new ones. Unscrew the oil pressure relief valve cap, spring, and valve, ensuring not to remove the oil filter by-pass valve and spring as they are secured in place. Thoroughly wash the parts in the proper solvent and inspect the relief valve for wear and scoring, checking that the relief valve spring is not collapsed or worn; any questionable spring should be replaced. Verify that the relief valve fits easily in its bore in the cover, as any noticeable side shake indicates that the valve or cover should be replaced. Ensure the filter by-pass valve is flat and free of nicks, cracks, warping, or scratches.