This rubber O-ring seals the rear block cover on GM LS-Series engine blocks. It is a direct service replacement sold individually.
Specifications:
- Type: O-ring seal
- Location: rear block cover
- Material: rubber
- Quantity: each
- Part number: 19166181
Applications:
- GM LS-Series engines (rear block cover sealing)
FAQ
What does this O-ring seal?
It seals the rear block cover on GM LS-Series engine blocks to keep oil contained.
Is this a single O-ring?
Yes. Part number 19166181 ships individually, one O-ring per order.
What material is used?
It is a rubber O-ring sized for the LS-Series rear block cover.

