Sealed Power Engine Crankshaft Main Bearing Set P/N:4923MA 10
Sealed Power 4923MA main bearing set for the 1966-1973 Dodge Charger V8 5.2L, the 1967 Charger V8 4.5L, the 1970-1973 Charger V8 5.6L and other vehicles supports the crankshaft as it turns in the engine block. These Sealed Power main bearings are made for rebuilding older engines.
Worn main bearings can show up as a knock from the lower engine or a low oil pressure light, but other faults can produce these too. With the engine off and cool, check the oil level and look for metallic glitter on the dipstick before you replace anything; a shop can test oil pressure.
It is listed for a wide range of Dodge, Plymouth and Checker models, including the 1965-1973 Dodge Coronet V8 5.2L and the 1957-1973 Plymouth Fury V8 5.2L. It is a direct-fit replacement for these vehicles and meets or exceeds OEM specifications. The engine takes one set, with a bearing for each main journal.
Fit and size
Build and materials
Interchange: 5M540P · MS540A · MS540P · MS963P · MS540M · BC321J · BC321JSTD · 5DM2704 · 5DM4654 · 5M3304 · MB558AM · MB558SI · MBS393B · MBS629CP · MBS672B · MBS672CP · 867T · MS2540 · VP796 · VPM796
This part cross-references / interchanges with the following part numbers:
Does the Sealed Power main bearing set fit the 1970-1973 Dodge Charger V8 5.6L?
Yes. Sealed Power 4923MA is listed for the 1970-1973 Dodge Charger V8 5.6L. If your car is a different one, look it up in the "Vehicles it fits" section on this page.
What material is the Sealed Power 4923MA main bearing set made from?
Sealed Power 4923MA uses A-Series aluminum bearings, built from a bi-metal aluminum alloy.
Do these main bearings resist seizure better than tri-metal ones?
Yes. The bi-metal alloy has greater seizure resistance than tri-metal material, and the silicon in it adds surface hardness.
How can I tell if my crankshaft main bearings are worn?
A knock from the lower engine, a low oil pressure light or metallic glitter on the dipstick can mean worn bearings, though other faults can cause them too. A shop can test oil pressure.
Does 4923MA replace the MS540P main bearing set?
Yes. MS540P is one of the numbers that Sealed Power 4923MA replaces, along with the other numbers on the Interchange line.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.