Sealed Power E-378X piston ring set for the 1977-1979 Buick Electra V8 6.6L and other vehicles seals each piston against its cylinder wall. Each Sealed Power piston ring in this engine piston ring set holds combustion pressure in the cylinder and keeps oil out of the combustion chamber.
Oil use, blue exhaust smoke and weak compression can mean worn rings, though valve stem seals or worn cylinders may be behind them, so pin down the source before you order rings.
The 1977-1979 Buick Electra V8 6.6L, 1977-1979 Buick Estate Wagon V8 6.6L and 1977-1979 Oldsmobile 98 V8 6.6L are covered by this set, along with many other Buick, Oldsmobile and Pontiac models. Open the "Vehicles it fits" section to check your exact model and engine. The 1977-1979 Buick Electra V8 6.6L takes one set, and the set meets or exceeds OEM specifications.
Fit and size
Build and materials
Interchange: R43518-STD
378X · 51147 · 556291 · 556293 · 7818 · 4454 · BC1710 · C1710 · T8320X
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
Does the Sealed Power E-378X fit a 1977-1979 Buick Estate Wagon V8 6.6L?
Yes. Sealed Power E-378X fits the 1977-1979 Buick Estate Wagon V8 6.6L. For other models, open the "Vehicles it fits" section to check your engine.
Is this Sealed Power piston ring set enough for a V8 engine?
Yes. Sealed Power E-378X is listed for eight cylinders, so one set covers a V8, and each application takes one set.
Are these piston rings oversized?
No. This Sealed Power E-378X set is not oversized.
What is the Sealed Power Vintage line?
Sealed Power Vintage components cover applications over 35 years old and are meant to restore classic engines to like-new performance.
Does blue exhaust smoke mean the piston rings are worn?
No, not by itself. Blue smoke can be one sign of worn piston rings, along with oil use and low compression, and a shop can run a compression or leak-down test to check.
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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.
