The Enginetech ST162564 is a 4-pack of exhaust-side valve seats engineered as a stock replacement for 1999-2016 Buick, Cadillac, Chevrolet, GMC and more engine applications.
Important Notes
- Sold as a 4-pack.
- Application side: Exhaust valve position - confirm you are replacing the correct side.
- Seat angle: 45deg - confirm head casting matches specified angle before installation.
- Hi-chromium cast construction: standard durable alloy for gasoline applications and general valve-job rebuilds.
Specifications
| Brand | Enginetech |
| Part Number | ST162564 |
| Product Type | Valve Seats |
| Quantity per Pack | 4 |
| Inner Diameter | 1.335/1.387T" |
| Outer Diameter | 1.6320" |
| Thickness | .4200" |
| Seat Angle | 45deg |
| Material | Hi-Chrome Cast |
| Application Side | Exhaust |
| Country of Origin | Taiwan |
| OEM / Aftermarket Cross References | Manley:31480, Elgin:31691, Dynagear:31480, SB International:SB1625-64, Dura-Bond Bearing:31691, Mercedes-Benz:1100531532, Mercedes-Benz:1160531031, Mercedes-Benz:1170530232 |
Vehicle Fitment
- Years: 1999-2016
- Makes: Buick, Cadillac, Chevrolet, GMC, Isuzu, Saab
- Models: 9-7x, Ascender, Avalanche, Avalanche 1500, Canyon, Envoy, Envoy XL, Envoy XUV, Escalade, Escalade ESV, Escalade EXT, Express 1500, Express 2500, Express 3500, Express 4500, Rainier, SSR, Savana 1500, Savana 2500, Savana 3500, Savana 4500, Sierra 1500, Sierra 1500 Classic, Sierra 1500 HD, Sierra 1500 HD Classic, and more
Valve seats are precision-machined rings press-fit or cast into the cylinder head to form the sealing surface between the valve face and the combustion chamber. Over time, exhaust seats erode from hot combustion gases, suffer impact damage from valve float, or lose geometry from repeated valve-grinding operations - any of which leads to lost compression, burnt valves, and rough idle. Installing new valve seats during a head rebuild restores correct seat angle, sealing pressure, and thermal contact between the valve and the cylinder head.
WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or reproductive harm, including lead and nickel.
