QualCast 20-1812-3
45-degree valve seat insert, 1-1/2" / 38.10 mm ID, 1.8175" / 46.16 mm OD, 7/32" / 5.56 mm depth.
QualCast 20-1812-3 is a valve seat insert for cylinder-head machining. The insert is a machine-shop component that must be finished to the valve and cylinder-head material after installation.
Application / fitment
QualCast/Goodson catalog listings place this part in selected John Deere 1.9 / 113 and Chevrolet 2.5 / 153 applications, with broader listings covering selected Buick, Cadillac, Chevrolet, Ford, GMC, Mercury, Oldsmobile, Pontiac, and Studebaker applications. In practice, seat dimensions and machining requirements determine fit.
- part type: valve seat insert
- example catalog applications: John Deere 1.9 / 113, Chevrolet 2.5 / 153
- selected classic American applications by seat dimensions
- seat angle: 45 degrees
A valve seat insert should be installed by a cylinder-head machine shop. Correct press fit, counterbore preparation, and final seat-angle machining are required after installation.
Technical information
- part type: valve seat insert
- inside diameter: 1-1/2" / 38.10 mm
- outside diameter: 1.8175" / 46.16 mm
- depth: 7/32" / 5.56 mm
- seat angle: 45 degrees
- sale unit: 1 piece