Clevite MS-1041P-20 | Engine Crankshaft Main Bearing Set

Part Number
Engine Crankshaft Main Bearing Set

Fits: 63-66 American Motors Classic, 65-67 American Motors Marlin, 66-74 American Motors Ambassador, 66-68 American Motors American, 66-70 American Motors Rebel, 66 American Motors Rogue, 68-70 American Motors AMX, 68-74 American Motors Javelin, 69 American Motors Rambler, 70-77 American Motors Hornet, 70-73 Jeep J-2500, 70-73 Jeep J-2600, 70-71 Jeep J-3800, 71-78 American Motors Matador, 71-81 Jeep CJ5, 71-75 Jeep CJ6, 71-73 Jeep J-100, 71-73 Jeep J-4500, 71-73 Jeep J-4600, 71-73 Jeep J-4700, 71-73 Jeep J-4800, 72-76 American Motors Gremlin, 72-73 Jeep Commando, 72-83 Jeep Wagoneer, 74 International 100, 74 International 200, 74-83 Jeep Cherokee, 74-88 Jeep J10, 74-88 Jeep J20, 78-79 American Motors AMX, 76-81 Jeep CJ7, 78-79 American Motors Concord, 78-79 American Motors Pacer, 79 American Motors Spirit, 84-91 Jeep Grand Wagoneer

Special Price $127.79 Regular Price $141.99
In stock
Only 3 left
Free Shipping
Estimated Ship Date: 1 Business Day or Less
Ideal for rebuilding engines where more demanding use is anticipated, such as heavy duty, motorsports, or street performance. As it is the most versatile replacement, Clevite engine bearing P-Series is suitable for most OE applications. Due to the increased load capacity of the Tri-Metal design, it is a suitable upgrade from Bi-Metal engine bearings.

BRAND: Clevite


  • Engine Crankshaft Main Bearing Set


Bearing Item GradeOE Replacement
Bearing MaterialTM-77
Bearing O.D. or Housing Bore (max.)MB2579P20=2.9417in MB2578P20(F)=2.9417in
Bearing O.D. or Housing Bore (min.)MB2579P20=2.9410in MB2578P20(F)=2.9410in
Bearing SeriesP
Max. WallMB2579P20=0.1059in MB2578P20(F)=0.1059in
Meets or Exceeds Original Equipment Manufacture SpecificationsYes
Size0.020in Undersize
Standard Shaft Diameter (max.)MB2579P20=2.7289in MB2578P20(F)=2.7289in
Standard Shaft Diameter (min.)MB2579P20=2.7274in MB2578P20(F)=2.7274in
Vertical Oil Clearance (max.)MB2579P20=0.0038in MB2578P20(F)=0.0038in
Vertical Oil Clearance (min.)MB2579P20=0.0006in MB2578P20(F)=0.0006in

OE Replacement P Series (Tri-Metal) .020in Undersize



  • Sealed Power: 5037M20


  • 1974-1974 International 200
  • 1970-1977 American Motors Hornet
  • 1969-1969 American Motors Rambler
  • 1972-1973 Jeep Commando
  • 1972-1976 American Motors Gremlin
  • 1979-1979 American Motors Spirit
  • 1972-1983 Jeep Wagoneer
  • 1974-1988 Jeep J10
  • 1965-1967 American Motors Marlin
  • 1971-1973 Jeep J-100
  • 1971-1973 Jeep J-4600
  • 1978-1979 American Motors AMX
  • 1970-1973 Jeep J-2600
  • 1966-1966 American Motors Rogue
  • 1976-1981 Jeep CJ7
  • 1968-1974 American Motors Javelin
  • 1978-1979 American Motors Pacer
  • 1971-1973 Jeep J-4700
  • 1970-1971 Jeep J-3800
  • 1963-1966 American Motors Classic
  • 1978-1979 American Motors Concord
  • 1971-1973 Jeep J-4500
  • 1971-1975 Jeep CJ6
  • 1974-1983 Jeep Cherokee
  • 1968-1970 American Motors AMX
  • 1966-1974 American Motors Ambassador
  • 1970-1973 Jeep J-2500
  • 1984-1991 Jeep Grand Wagoneer
  • 1974-1974 International 100
  • 1974-1988 Jeep J20
  • 1971-1981 Jeep CJ5
  • 1971-1978 American Motors Matador
  • 1966-1968 American Motors American
  • 1966-1970 American Motors Rebel
  • 1971-1973 Jeep J-4800
Customer Questions
Will an engine flush clean my pistons?
No, an engine flush is unlikely to clean the pistons.
How to replace engine pistons?
Replacing engine pistons involves removing the engine from the vehicle, disassembling it, removing the pistons, inspecting the engine components, installing the new pistons, reassembling the engine, and testing it. It's a complex process that should only be attempted by experienced mechanics.
When do engine pistons rings go bad?
Engine piston rings can go bad due to wear and tear, inadequate lubrication, overheating, manufacturing defects, or improper installation. Symptoms of failing piston rings include reduced engine power, increased oil consumption, and blue smoke from the exhaust. Regular maintenance and inspection can help identify potential issues.
Why do engine piston rings fail?
Engine piston rings can fail due to wear and tear, inadequate lubrication, overheating, manufacturing defects, or improper installation. Regular maintenance and inspection of the engine can help identify potential issues. Symptoms of failing piston rings include reduced engine power, increased oil consumption, and blue smoke from the exhaust.
Can you replace engine pistons rings without removing the engine?
Replacing engine piston rings without removing the engine is possible but not recommended due to the extensive disassembly required and the risk of damaging other engine components. A full rebuild or overhaul is generally more efficient and effective.
Are oil pump gears necessary?
Yes, oil pump gears are essential for maintaining proper engine lubrication in an internal combustion engine.
How do oil pumps work?
Oil pumps work by creating pressure to circulate engine oil throughout an internal combustion engine.
Where is the oil pump located?
The oil pump is typically located inside the engine's lower oil pan or sump.
Why do oil pump failures happen?
Oil pump failures can arise from wear, contamination, poor maintenance, and manufacturing defects, causing inadequate lubrication and potential engine damage.
Please, mind that only logged in users can submit questions

Compatible Vehicles

Copyright © 2013-present PartsHawk, LLC. All rights reserved.