Shop cylinder O-ring groove cutters for engine block work: the Groove-O-Matic Block O-Ringing Tool, the Groove-O-Matic Block Ringing Tool and a replacement O-ring groove cutter carbide insert (.039). These tools cut the groove around each cylinder bore for an O-ringed block. Check each listing for fitment and specs before ordering.
Cylinder O-Ring Groove Cutters
- Groove-O-Matic Block O-Ringing Tool
- Groove-O-Matic Block Ringing Tool
- O-Ring Groove Cutter Carbide Insert (.039)
See more engine-related tools and all tools.
O-Ring Groove Cutters — Frequently Asked Questions
What is an O-ring groove cutter used for?
An O-ring groove cutter cuts a groove into the engine block deck around each cylinder so an O-ring can be installed for extra head-gasket sealing. We carry Groove-O-Matic block O-ringing tools.
Do you sell replacement cutter inserts?
Yes. We carry an O-ring groove cutter carbide insert (.039). Check the listing to confirm it fits your tool.