Sealed Power 4040M 30 main bearing set for the 1967 Pontiac Firebird V8 5.3L, the 1967-1979 Firebird V8 6.6L, the 1968-1977 Firebird V8 5.7L and other vehicles supports the spinning crankshaft in the engine block. These Sealed Power main bearings are meant for engine rebuilds.
- Sealed Power Vintage line for rebuilds of older engines
- Steel-backed bronze alloy lining with overplate
- Grooved upper main bearings
- Fatigue resistance and strength, with the conformability older applications need
- State-of-the-art manufacturing to exacting tolerances
Quick facts
- Part: Sealed Power 4040M 30 main bearing set
- Also called: crankshaft main bearings
- Fits: the 1967 Pontiac Firebird V8 5.3L, the 1967-1979 Firebird V8 6.6L, the 1968-1977 Firebird V8 5.7L and other vehicles
- Material: steel-backed bronze alloy lining with overplate
- Condition: New
A deep knock from the lower engine, low oil pressure or metal in the oil can mean main bearing wear, but those signs can also come from other problems. Find the cause first. Once the engine is apart, look at the old bearings and the crank journals for scoring or uneven wear.
Fits
As a direct-fit replacement main bearing set, it also covers the 1959-1966 Pontiac Bonneville V8 6.4L, the 1967-1978 Bonneville V8 6.6L, the 1971 Bonneville V8 5.7L, the 1974 Bonneville V8 5.7L and the 1977 Bonneville V8 5.7L, plus the 1959-1966 Pontiac Catalina V8 6.4L, the 1967-1978 Catalina V8 6.6L, the 1970-1973 Catalina V8 5.7L and the 1976-1977 Catalina V8 5.7L. The set meets or exceeds OEM specifications. This listing is one set, and one set covers the engine.
Specifications
- Quantity per application: 1 set
- Construction: steel-backed bronze alloy lining with overplate
- Design feature: grooved upper main bearings
- Grade: Premium
- Condition: New
- Country of origin: Mexico
Interchange: MB5511AM 030
5M496P30 · MS483G30 · BC383J030
This part cross-references / interchanges with the following part numbers:
5M496P30, MS483G30, BC383J030, MB5511AM 030
Frequently Asked Questions
Does the Sealed Power 4040M 30 fit the 1967-1979 Pontiac Firebird V8 6.6L?
Yes. Sealed Power 4040M 30 fits the 1967-1979 Pontiac Firebird V8 6.6L, the 1967 Firebird V8 5.3L and the 1968-1977 Firebird V8 5.7L. For any other car, look it up in the "Vehicles it fits" section.
What is the lining on the Sealed Power main bearing set?
Sealed Power 4040M 30 has a steel-backed bronze alloy lining with overplate, and its upper main bearings are grooved.
Are these crankshaft main bearings made for older engines?
Yes. This main bearing set is from the Sealed Power Vintage line for applications over 35 years old, and its lining provides the conformability older applications need.
Where is the 4040M 30 main bearing set made?
Country of origin is Mexico, and this main bearing set is Premium grade.
Does the Sealed Power 4040M 30 replace MB5511AM 030?
Yes. MB5511AM 030 is one of the other-brand numbers that Sealed Power 4040M 30 replaces; the rest are on the Interchange line.
