Sealed 994M 30 main bearing set for the 1958-1967 Chevrolet Impala V8 4.6L, the 1962-1967 Impala V8 5.3L, the 1964-1967 Impala V8 5.4L and other vehicles supports the crankshaft so it can turn in the engine block. It meets or exceeds OEM specifications.
- Sealed Power Vintage line, made for restoring classic engines
- Steel-backed bronze alloy lining with overplate
- Fatigue resistance and strength, with the conformability that older applications need
- Exacting tolerances from state-of-the-art manufacturing
Quick facts
- Part: Sealed 994M 30 main bearing set
- Also called: crankshaft main bearings
- Fits: the 1958-1967 Chevrolet Impala V8 4.6L, the 1962-1967 Impala V8 5.3L, the 1964-1967 Impala V8 5.4L and other vehicles
- Material: Steel backed overplated bronze alloy
- Condition: New
Worn main bearings can show up as a deep knock from the lower engine, a low oil pressure light or metal particles in the oil. Before you replace the bearings, rule out other causes of low oil pressure or engine knock, because those signs can have more than one source.
Fits
The 1960-1966 Chevrolet Suburban V8 4.6L and the 1967 Chevrolet Camaro V8 4.9L or 5.3L take this set, and so do many other vehicles, with one set per vehicle. Open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Undersize: 0.030 inch
- Quantity per vehicle: 1
Build and materials
- Material: Steel backed overplated bronze alloy
- Grade type: Premium
- Condition: New
- Country of origin: Mexico
Interchange: MB554AM 030 · 5M429P30 · MS429P30 · BC319J030 · MS1808P30
This part cross-references / interchanges with the following part numbers:
5M429P30, MS429P30, BC319J030, MB554AM 030, MS1808P30
Frequently Asked Questions
Does the Sealed 994M 30 main bearing set fit the 1960-1966 Chevrolet Suburban V8 4.6L?
Yes. Sealed 994M 30 fits the 1960-1966 Chevrolet Suburban V8 4.6L and the 1966 Suburban V8 5.3L. For another car, open the "Vehicles it fits" section and check your model and engine.
Are these crankshaft main bearings 0.030 undersize?
Yes. This Sealed 994M 30 set is listed as 0.030 inch undersize.
What material is the Sealed Power 994M 30 bearing lining?
The material is steel backed overplated bronze alloy: a bronze alloy lining with an overplate on a steel backing.
Does the 994M 30 set replace number MS429P30?
Yes. MS429P30 is one of the cross-reference numbers for Sealed 994M 30, and the others are on the Interchange line.
Could a deep knock from the bottom of the engine mean worn main bearings?
It can. Worn main bearings can also bring a low oil pressure light or metal in the oil, and an engine shop can measure bearing clearance.
