A direct-replacement fuel pressure regulator diaphragm designed for 1985–1995 GM cars. This precision elastomer diaphragm restores proper sealing inside the regulator to maintain correct fuel pressure, ensuring smooth idle, reliable starting and consistent fuel delivery. Built for durability and resistance to modern fuel blends, it is an essential part for routine maintenance, regulator rebuilds and full restoration projects. Easy to install for anyone familiar with basic fuel system servicing, it helps prevent fuel seepage and vacuum leaks that compromise performance.
Features:
- Fitment: Compatible with many 1985–1995 GM cars (Chevrolet, Buick, Oldsmobile, Pontiac, Cadillac) — verify part number for exact application.
- Made from a premium fuel-resistant elastomer to provide long-lasting sealing and resistance to modern fuel blends.
- Restores and stabilizes fuel pressure for improved drivability, starting and fuel economy.
- Direct replacement for worn, cracked or hardened diaphragms during regulator rebuilds or maintenance.
- Helps prevent vacuum leaks and fuel seepage, extending regulator life and reducing the chance of drivability issues.
- Simple swap during regulator service; ideal for restorations and preventative maintenance.
Installation / Application:
- Difficulty: 3/5
- Estimated time: 45-90 minutes
Instructions:
- Relieve fuel system pressure and disconnect the battery to minimize fire risk.
- Label and disconnect vacuum lines, electrical connectors and fuel lines to the regulator; plug open fuel lines to prevent contamination.
- Remove the regulator from the fuel rail or mount, noting orientation and mounting hardware.
- Carefully disassemble the regulator housing on a clean work surface, keeping fasteners and small parts organized.
- Remove the old diaphragm and inspect internal components for wear, corrosion or scoring; replace O-rings/seals as needed.
- Clean mating surfaces and all internal passages with parts solvent; ensure no debris remains.
- Install the new diaphragm in the correct orientation, making sure it seats evenly and any locating features align.
- Replace any gaskets or O-rings, reassemble the regulator, and torque fasteners to the regulator specification if available.
- Reinstall the regulator on the vehicle, reconnect vacuum lines, fuel lines and electrical connectors.
- Reconnect the battery, pressurize the fuel system, check all connections for leaks, and verify correct fuel pressure using a gauge.
- Start the engine, recheck for leaks and confirm proper idle and drivability. Road-test to ensure stable performance.
About Redline Restomotive
Redline Restomotive® has established itself as a premier brand in the world of classic car restoration, providing enthusiasts with high-quality parts that meet the exacting standards of original manufacturer specifications. Dedicated to the preservation of American automotive history, Redline Restomotive® combines advanced manufacturing techniques with an in-depth understanding of vintage vehicles. The result is a range of products that seamlessly blend into the design and function of classic cars, giving restorers and collectors the assurance that each part reflects the era’s style, quality, and performance.
Crafted for both durability and aesthetic accuracy, Redline Restomotive® parts are ideal for those who value authenticity in their restoration projects. Whether restoring a car for display, personal enjoyment, or roadworthiness, customers rely on Redline Restomotive® for parts that not only fit perfectly but also contribute to the overall integrity and longevity of the vehicle. Each item is carefully engineered to replicate the fit, finish, and functionality of original components, making Redline Restomotive® a trusted name in restoration circles.
The extensive product catalog from Redline Restomotive® covers a wide variety of categories, allowing classic car owners to source everything from essential mechanical parts to subtle interior details. This comprehensive approach enables a cohesive restoration experience, where customers can confidently maintain both the exterior and interior authenticity of their vehicles. With Redline Restomotive®, every detail matters, providing the perfect balance between innovation and tradition for classic car preservation.
For more information or to explore their product offerings, you can visit retailers such as Muscle Cars & Classics, which feature a comprehensive selection of Redline Restomotive® products.
Vehicle Fitment:
The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
| Make |
Model |
Years |
| Buick |
Skylark |
1985 |
| Cadillac |
Cimarron |
1985 - 1986 |
| Chevrolet |
Camaro |
1985 - 1995 |
| Chevrolet |
Cavalier |
1985 - 1986 |
| Chevrolet |
Celebrity |
1985 - 1986 |
| Chevrolet |
Citation II |
1985 |
| Chevrolet |
Corvette |
1985 - 1992 |
| Oldsmobile |
Cutlass Ciera |
1986 |
| Oldsmobile |
Firenza |
1985 - 1986 |
| Pontiac |
6000 |
1985 - 1986 |
| Pontiac |
Fiero |
1985 - 1988 |
| Pontiac |
Firebird |
1985 - 1995 |
