Enginetech S0113 1-Piece Viton Rear Main Seal for 1991-2000 Chevrolet GMC - Offset Lip - OEM-Spec Replacement - Direct OEM Replacement
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The Enginetech SK0113 is a 1-piece viton rear main seal kit engineered as a stock replacement for 1991-2000 Chevrolet, GMC engine applications.
| Brand | Enginetech |
| Part Number | SK0113 |
| Product Type | Rear Main Seal Kit |
| Design | 1-Piece |
| Material | Viton |
| Lip Configuration | Offset Lip |
| Kit Contents | O-ring |
| Country of Origin | India |
The rear main seal (also called the crankshaft rear seal) prevents engine oil from leaking between the back of the crankshaft and the transmission bell housing. Over miles and heat cycles, the seal hardens, cracks, or takes a permanent compression set - producing the characteristic oil drip at the bell housing and, if left unchecked, oil contamination of the clutch disc or flex plate. Replacing the rear main seal during a transmission service or engine rebuild restores the final oil seal between the crankshaft and drivetrain, preventing slow leaks and protecting the clutch and flywheel from contamination.