MELLING HIGH-VOLUME BLUEPRINTED OIL PUMP. The pump is a brand new Melling M-155HV Pump Blueprinted by PRECISION OIL PUMPS. Fits all Chevy Small Block 283, 327, 350, 400 engines with a 53/4" pickup. Each pump is disassembled in groups of ten, the passages are radiused, blended and polished by hand. The Housings & Gears are then Deburred by a Vibratory Polisher then cleaned. The Gears are then sprayed with TECH-LINE moly-coating and oven curred. Three Critical Clearances are checked on reassembly;(1) Gear to Housing, (2) Mesh or Backlash, (3) Gear to Cover-Plate. With Ten gear sets to choose from , One pair with correct clearances will be installed. The relief- valve is De-burred with emmory cloth, cleaned and is re-installed with the existing spring and new hardware. Each cover plate is also Vibratory Polished, cleaned and fastened with safety-wired aircraft bolts. All pumps are bench tested. Buy with confidence

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