Sealed Power 4261M Engine Crankshaft Main Bearing Set

Brand Sealed Power 4261M
Application O.e. replacement 1964-75
Displacement 390, 427, 428
Engine Family 390, 427, 428
Manufacture Ford
Material Overplated copper-lead alloy
Set Type Main set
Sizes Std-1-10-20-30-40-50-60
Fits Ford and Mercury · 167 vehicles

OE replacement. Main bearing set for straightforward engine rebuilds.

Copper-lead alloy. Overplated construction for dependable wear resistance.

Vintage components. Built with ISO and QS certified manufacturing.

Cross-references 5M685P, 5M2114 and 5M2117 for the same application. See all 16.

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Ford 390-428 Main Bearing Set

Sealed Power 4261M is an OE replacement engine crankshaft main bearing set for classic Ford V8 rebuilds. It is built for 1964-75 applications with 390, 427, and 428 cubic inch engines, using an overplated copper-lead alloy for restoration work that calls for original-style fit and durability.

Key Features

  • OE replacement main bearing set for Ford 390, 427, and 428 engines
  • Overplated copper-lead alloy construction for rebuild applications
  • Fits standard and undersize service needs: Std, 1, 10, 20, 30, 40, 50, 60
  • Coverage for classic Ford and Mercury performance and truck engines
  • Sealed Power vintage component line for engines over 35 years old

Detailed Description

Sealed Power 4261M is made for vintage Ford engine rebuilds where correct bearing fit and material selection matter. This main bearing set supports 390, 427, and 428 engine families used in classic Ford and Mercury vehicles, including Ford Mustang, Ford Thunderbird, Mercury Cougar, and Ford F-100 and F-250 truck applications. The overplated copper-lead alloy construction is suited to restoration work that requires dependable crankshaft support and long service life.

This part cross-references Sealed Power and related aftermarket numbers such as 5M685P and MS685P for the same application. If you are searching for a Ford 390 main bearing set, a Ford 428 crankshaft main bearing set, or a Sealed Power 4261M bearing set for a classic rebuild, this part is built for that service.

What It Helps Fix

  • Crankshaft bearing wear in high-mileage Ford V8 engines
  • Excessive main bearing clearance during engine rebuilds
  • Noise from worn or damaged crankshaft main bearings
  • Loss of oil pressure related to bearing wear
  • Restoration needs for original Ford 390, 427, or 428 engine assemblies

Installation Notes and Tips

Verify crankshaft journal size, bearing clearance, and engine family before assembly. This set is listed for standard and undersize service ranges, so match the bearing size to the crankshaft machining specification. Confirm fitment for your exact vehicle and engine combination before installation. Fits 1965-1976 Ford F-100, N/A; Fits 1975-1976 Ford F-150, N/A; Fits 1965-1976 Ford F-250, N/A; Fits 1965-1976 Ford F-350, N/A; Fits 1965-1971 Ford LTD, N/A; Fits 1961-1971 Mercury Colony Park, N/A; Fits 1967-1970 Ford Mustang, N/A; Fits 1967-1970 Mercury Cougar, N/A; Fits 1969-1970 Mercury Marauder, N/A; Fits 1963-1966 Mercury Marauder, N/A; Fits 1967-1970 Mercury Marquis, N/A; Fits 1961-1969 Ford Thunderbird, N/A; Fits 1968-1969 Mercury Montego, N/A; Fits 1966-1967 Mercury Capri, N/A; Fits 1964-1967 Mercury Villager, N/A.

Quality Assurance

Sealed Power Vintage components are manufactured with modern materials and ISO- and QS-certified processes to support restoration-grade performance and longevity in classic engine rebuilds.

This part fits 167 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1976FordF-1006.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1976FordF-1005.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1976FordF-1506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1976FordF-1505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1976FordF-2506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1976FordF-2505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1976FordF-3506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1976FordF-3505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1975FordF-1006.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1975FordF-1005.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1975FordF-1506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1975FordF-1505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1975FordF-2506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1975FordF-2505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1975FordF-3506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1975FordF-3505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1974FordF-1006.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1974FordF-1005.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1974FordF-2505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1974FordF-2506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1974FordF-3505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1974FordF-3506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1973FordF-1006.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1973FordF-1005.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1973FordF-2505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1973FordF-2506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1973FordF-3505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1973FordF-3506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1972FordF-1006.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1972FordF-1005.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1972FordF-2505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1972FordF-2506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1972FordF-3505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1972FordF-3506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1971FordF-1006.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1971FordF-1005.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1971FordF-2505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1971FordF-2506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1971FordF-3505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1971FordF-3506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1971FordLTD6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1971MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970FordF-1006.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970FordF-1005.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970FordF-2505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970FordF-2506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970FordF-3505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970FordF-3506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970FordLTD6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970FordLTD7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970FordMustang7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970MercuryColony Park7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970MercuryCougar6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970MercuryCougar7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970MercuryMarauder6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970MercuryMarauder7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970MercuryMarquis7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1970MercuryMarquis6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordF-1006.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordF-1005.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordF-2505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordF-2506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordF-3505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordF-3506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordLTD7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordLTD6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordMustang7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordMustang6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969FordThunderbird7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969MercuryColony Park7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969MercuryCougar6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969MercuryCougar7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969MercuryMarauder6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969MercuryMarauder7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969MercuryMarquis7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969MercuryMarquis6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969MercuryMontego7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1969MercuryMontego6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordF-1006.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordF-1005.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordF-2505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordF-2506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordF-3505.9LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordF-3506.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordLTD7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordLTD6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordMustang7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordMustang6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968FordThunderbird6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968MercuryColony Park7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968MercuryCougar6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968MercuryCougar7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968MercuryMarquis7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968MercuryMarquis6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968MercuryMontego7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1968MercuryMontego6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967FordF-1005.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967FordF-2505.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967FordF-3505.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967FordLTD7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967FordLTD6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967FordMustang7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967FordMustang6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967FordThunderbird6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967FordThunderbird7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryCapri7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryCapri6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryColony Park7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryColony Park6.7LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryCougar6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryMarquis7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryMarquis6.7LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryMarquis6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryVillager7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1967MercuryVillager6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966FordF-1005.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966FordF-2505.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966FordF-3505.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966FordLTD7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966FordLTD6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966FordLTD5.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966FordThunderbird6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966FordThunderbird7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966MercuryCapri7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966MercuryCapri6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966MercuryColony Park7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966MercuryColony Park6.7LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966MercuryMarauder7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966MercuryMarauder6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966MercuryMarauder6.7LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966MercuryVillager7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1966MercuryVillager6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965FordF-1005.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965FordF-2505.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965FordF-3505.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965FordLTD7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965FordLTD6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965FordLTD5.8LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965FordThunderbird6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965FordThunderbird7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965MercuryColony Park7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965MercuryMarauder7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965MercuryMarauder6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1965MercuryVillager7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1964FordThunderbird6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1964FordThunderbird7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1964MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1964MercuryColony Park7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1964MercuryMarauder7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1964MercuryMarauder6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1964MercuryVillager7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1963FordThunderbird6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1963FordThunderbird7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1963MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1963MercuryColony Park7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1963MercuryMarauder7.0LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1963MercuryMarauder6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1962FordThunderbird6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1962MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1961FordThunderbird6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
1961MercuryColony Park6.4LV8N/A3.824 (in) Maximum Flange Outside Diameter; Standard
Directly replaces or cross-references 16 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
5M685P5M21145M21171261PBC303JMB559AMMB559MPMBS585CPMBS706CPMS685HGMS685PMS863PMS2685PVP91221VPM91221VPM91272