Clevite 77 Buick High-Performance Main Bearings

H Series -

• Best to start with when unsure which bearing to choose
• Medium level of eccentricity and high crush
• Enlarged chamfers for greater crankshaft fillet clearance
• Made without flash plating for better seating
• Use with crankshafts that have oversized fillets
• Use with engines that run mid-high RPM range
• Contact patterns should ideally cover 2/3 to 3/4 of the bearing surface

   

  P Series -
• Typically the greatest level of eccentricity
• Rods and mains have high crush for maximum retention
• Most are fully grooved to maximize oil flow to rod bearings
• Reduced overlay thickness to prevent overlay fatigue
• Use where extremely high RPMs cause severe rod bore close-in
• Use where higher eccentricity is desired to narrow bearing contact patterns
  

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  Part Number Key
  • H - High-Performance
  • HD - High-Performance bearing with dowel hole
  • HK - High-Performance bearing with moly/graphite coating
  • P - Standard Clevite 77 tri-metal bearing
  • M - Blown Fuel Engine bearing for severe crankshaft deflections & edge loading
  • N - High-Performance Narrowed for greater crankshaft fillet clearance
  • HG - High-Performance full angular grooved bearing
  • V - High-Performance with Lead Indium overlay (On Main Sets this indicates partial groove also)
  • VG - High-Performance with Lead Indium full angular grooved bearing
  • D - Bearing has a dowel hole
  • K - Tri-Armor coated bearing
  • X - Bearing has .001 more oil clearance than standard
  • XX - Bearing has .002 more oil clearance than standard
  • A or AL - Indicates Aluminum bearing material

  Note: Clevite main bearings are priced as sets.