Sealed E-288X 40 piston ring set for the 1968-1980 Buick LeSabre V8 5.7L, the 1981-1990 LeSabre V8 5.0L and other vehicles seals each piston against its cylinder wall. Exacting tolerances put it at or above OEM specifications.
- Top ring of grey iron with phosphate
- Second ring of grey iron with a phosphate coating and a reverse torsional face
- Oil ring in a 3-piece flex vent design
- Oversized by 0.040 inch, with a 3.8000 inch bore diameter
- Leading edge materials and state-of-the-art manufacturing
Quick facts
- Part: Sealed E-288X 40 piston ring set
- Also called: engine piston ring set
- Fits: the 1968-1980 Buick LeSabre V8 5.7L, the 1981-1990 LeSabre V8 5.0L and other vehicles
- Material: Grey iron with phosphate (top and second rings)
- Condition: New
Blue exhaust smoke, rising oil use or low compression can mean worn rings. These signs alone do not prove the rings are at fault, since worn valve stem seals can also let oil burn.
Fits
This ring set is a direct-fit replacement for a wide range of Buick, Cadillac, Chevrolet, Oldsmobile and Pontiac models, including the 1986-1990 Chevrolet Caprice V8 5.0L and the 1987-1990 Cadillac Brougham V8 5.0L. If your car is not named here, look up its year and engine in the "Vehicles it fits" section.
Specifications
Fit and size
- Oversize: 0.040 inch
- Bore diameter: 3.8000 inch
- Ring groove widths: 5/64 x 5/64 x 3/16 inch
- Oil ring width: 0.1875 inch
- Cylinders: 8
- Quantity per application: 1
Build and materials
- Top ring material: grey iron with phosphate
- Second ring material: grey iron with phosphate coating
- Second ring face: reverse torsional
- Oil ring design: 3-piece flex vent
- Condition: New
- Country of origin: United States
In the box
One piston ring set covering eight cylinders. The engine takes one set.
Interchange: 50849CP.040 · R38058-040
288X040 · 2105144040 · 50849040 · 696040 · T8192X40
This part cross-references / interchanges with the following part numbers:
288X040, 50849CP040, 2105144040, 50849040, R38058-040, 696040, 50849CP.040, T8192X40
Frequently Asked Questions
Is the Sealed E-288X 40 right for a 1981-1990 Buick LeSabre V8 5.0L?
Yes. Sealed E-288X 40 is listed for the 1981-1990 Buick LeSabre V8 5.0L, and for the 1968-1980 LeSabre V8 5.7L.
What does this engine piston ring set include?
It is one set covering eight cylinders: top ring, second ring and a 3-piece flex vent oil ring. The engine takes one set.
What oversize is the E-288X 40 ring set?
Sealed E-288X 40 is oversized by 0.040 inch, with a bore diameter of 3.8000 inch. Its ring groove widths are 5/64 x 5/64 x 3/16 inch.
What can blue smoke from the exhaust mean for piston rings?
Worn rings can let oil reach the combustion chamber, which can show up as blue smoke or rising oil use. A shop can run a compression or leak-down test to check them.
What are the top and second rings made of on this ring set?
The top ring is grey iron with phosphate. The second ring is grey iron with a phosphate coating and a reverse torsional face.
