Keep your engine's crankcase breathing freely with the Mr. Gasket Engine Crankcase Breather Cap 9810. It fits a wide run of 1960s GM full-size and performance cars, including the 1964-1967 Buick Electra, 1965-1967 Cadillac DeVille, 1966-1967 Chevrolet Corvette, and 1965 Pontiac Grand Prix — see the Buyer's Guide tab for the full list of 24 applications.
A breather cap manages crankcase ventilation: it lets the pressure and blow-by gases that collect in the crankcase move through the intended path while helping limit oil-mist escape from the valve cover or filler opening.
- Crankcase ventilation: routes crankcase vapors through the designed opening as the engine runs.
- Oil-mist control: helps keep oil mist contained within the ventilation path.
- Simple service part: a straightforward replacement for a cracked, clogged, or missing original cap.
Signs the cap may need replacing include a cap that is broken, deteriorated, or lost, or oil misting around the filler opening. If a worn or missing breather cap is the cause, this Mr. Gasket unit replaces it.
Interchange: Manufacturer part number 9810.
