The Enginetech GD8040-100 is a 100-pack of valve guides engineered as a stock replacement for 1987-1993 Buick, Chevrolet, GMC, Pontiac engine applications.
Important Notes
- Bulk 100-pack - intended for machine shops or high-volume rebuilders. Individual and 4-pack options may be available under different part numbers.
- Universal intake/exhaust fitment: this guide is specified for both valve positions on supported engines.
- Spiral ID: internal grooves distribute oil along the valve stem for improved lubrication and longer service life.
Specifications
| Brand | Enginetech |
| Part Number | GD8040-100 |
| Product Type | Valve Guides |
| Quantity per Pack | 100 |
| Inner Diameter | .3150" |
| Outer Diameter | .5020" |
| Length | 2.25" |
| Material | Iron |
| ID Finish | Spiral ID |
| Application Side | Intake/Exhaust |
| Country of Origin | United States |
Vehicle Fitment
- Years: 1987-1993
- Makes: Buick, Chevrolet, GMC, Pontiac
- Models: 6000, Astro, Celebrity, Century, Fiero, Grand Am, LLV, Lumina, S10, S10 Blazer, S15, S15 Jimmy, Safari, Skylark, Somerset, Sonoma
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.
