The Enginetech GD7278 is a 4-pack of exhaust-side valve guides engineered as a stock replacement for 1978-1979 Pontiac engine applications.
Important Notes
- Sold as a 4-pack.
- Application side: Exhaust valve position - confirm you are replacing the correct side.
- Spiral ID: internal grooves distribute oil along the valve stem for improved lubrication and longer service life.
Specifications
| Brand | Enginetech |
| Part Number | GD7278 |
| Product Type | Valve Guides |
| Quantity per Pack | 4 |
| Inner Diameter | .3430" |
| Outer Diameter | .5640" |
| Length | 3.062" |
| Material | Iron |
| ID Finish | Spiral ID |
| Application Side | Exhaust |
| Country of Origin | United States |
| OEM / Aftermarket Cross References | Elgin:57278, Pioneer:07278 |
Vehicle Fitment
- Years: 1978-1979
- Makes: Pontiac
- Models: LeMans
Valve guides are precision-machined cylindrical sleeves press-fit into the cylinder head that guide the valve stem's travel and control valve-to-seat alignment during combustion cycles. Worn guides increase stem-to-guide clearance, causing oil consumption, valve seal failure, loss of seat contact, and premature valve and seat wear. Installing new guides during a valve job restores correct stem alignment, ensures proper valve sealing, and extends the service life of the valves, seats, and stem seals that work with them.
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.
