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CarterPart #: M4685
Carter M4685 Mechanical Fuel Pump
114 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Buick, Chevrolet, Pontiac, GMC, Oldsmobile, and Checker, Regal, Caprice, Monte Carlo, Grand Prix, El Camino, Caballero, Cutlass Supreme, Bonneville, Parisienne, Impala, Malibu, Cutlass Cruiser, LeSabre, Marathon, Delta 88, Grand LeMans, Century, Bel Air, Camaro, Cutlass, Firebird, LeMans, Chevelle, C10 Pickup, C10 Suburban, K10 Pickup, Biscayne, C20 Pickup, C30 Pickup, Chevy II, K10 Suburban, K20 Pickup, K20 Suburban, C15/C1500 Pickup, C25/C2500 Pickup, C25/C2500 Suburban, and C35/C3500 Pickup
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Not what you need? See all Mechanical Fuel Pump options
Reliable Mechanical Fuel Pump for Classic GM Vehicles
The Carter M4685 mechanical fuel pump is designed to deliver consistent fuel flow and pressure for a range of classic Buick, Chevrolet, Oldsmobile, and Pontiac models. Engineered to meet the specific requirements of vintage vehicles like the Chevrolet Camaro and Pontiac Firebird, this pump ensures steady fuel delivery for optimal engine performance.
- Mechanical fuel pump with threaded inlet and outlet connections
- Inlet outside diameter of 9.5 mm for precise fitment
- Includes gasket or seal for secure installation
- Two mounting holes for stable attachment
- Minimum flow rating of 40 gallons per hour
- Operating pressure range between 5.5 and 7 psi
- Outlet fitting thread size 5/8-18 unf-2b
Technical Details and Specifications
The Carter M4685 mechanical fuel pump features a single inlet and outlet, both threaded to ensure leak-free connections. With a minimum flow rating of 40 gallons per hour and a pressure range from 5.5 to 7 psi, this pump is suitable for maintaining consistent fuel delivery in vehicles such as the Chevrolet Impala, Buick LeSabre, and Oldsmobile Cutlass. The pump mounts securely using two mounting holes and includes a gasket or seal to prevent fuel leaks. Note that mounting hardware is not included, so appropriate bolts should be sourced separately.
Compatible Vehicles and Applications
This mechanical fuel pump is compatible with a variety of classic GM models, including but not limited to:
- Buick Century, LeSabre, and Regal
- Chevrolet Bel Air, Caprice, Malibu, Monte Carlo, and C10/K10/K20 Suburban
- Oldsmobile Cutlass, Cutlass Supreme, Cutlass Cruiser, Delta 88, and 88
- Pontiac Bonneville, Firebird, Grand LeMans, Grand Prix, and Parisienne
- Chevrolet El Camino and Camaro
Common Issues Addressed by the Carter M4685 Fuel Pump
- Inconsistent fuel pressure causing engine hesitation or stalling
- Fuel leaks due to worn or damaged seals
- Insufficient fuel flow affecting engine performance
- Mechanical pump failure in vintage GM vehicles
- Replacement of original equipment for restoration projects
Installation Notes and Tips
When installing the Carter M4685 mechanical fuel pump, ensure the gasket or seal is properly seated to prevent leaks. Since mounting hardware is not included, use appropriate bolts matching the original specifications. Verify that the threaded inlet and outlet connections are clean and free of debris before attaching fuel lines. It is recommended to inspect fuel lines and replace any worn components during installation to maintain system integrity.
Quality Assurance and Warranty
Carter mechanical fuel pumps are manufactured to meet OEM standards for fit and function. The M4685 part number undergoes rigorous quality control to ensure reliable operation in compatible Buick, Chevrolet, Oldsmobile, and Pontiac models. This product includes a gasket or seal to support proper installation. Please refer to Carter's warranty policy for specific coverage details.
| Brand | Carter |
|---|---|
| Part Number | M4685 |
| Gasket Or Seal Included | Yes |
| Inlet Outside Diameter | 9.5 |
| Inlet Quantity | 1 |
| Inlet Type | Threaded |
| Maximum Pressure | 7 |
| Minimum Flow Rating | 40 |
| Minimum Pressure | 5.5 |
| Mounting Hardware Included | No |
| Mounting Hole Quantity | 2 |
| Outlet Fitting Thread Size | 5/8-18 UNF-2B |
| Outlet Quantity | 1 |
| Outlet Type | Threaded |
| Pump Type | Mechanical |
This part fits 114 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|
| 1987 | Buick | Regal | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1987 | Chevrolet | Caprice | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1987 | Chevrolet | El Camino | 5.0L | V8 | N/A | External Pump | |
| 1987 | Chevrolet | Monte Carlo | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1987 | Pontiac | Grand Prix | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1986 | Buick | Regal | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1986 | Chevrolet | Caprice | 5.0L | V8 | N/A | Except Taxi Package; with 2 Line Pump | |
| 1986 | Chevrolet | El Camino | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1986 | Chevrolet | Monte Carlo | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1986 | Oldsmobile | Cutlass Supreme | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1986 | Pontiac | Bonneville | 5.0L | V8 | N/A | 1st Design, suitable for use with 2 Line Pump. | |
| 1986 | Pontiac | Grand Prix | 5.0L | V8 | N/A | 1st Design, suitable for use with 2 Line Pump. | |
| 1986 | Pontiac | Grand Prix | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1986 | Pontiac | Parisienne | 5.0L | V8 | N/A | 1st Design, suitable for use with 2 Line Pump. | |
| 1986 | Pontiac | Parisienne | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1985 | Buick | Regal | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1985 | Chevrolet | Caprice | 5.0L | V8 | N/A | Except Taxi Package; with 2 Line Pump | |
| 1985 | Chevrolet | El Camino | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1985 | Chevrolet | Impala | 5.0L | V8 | N/A | Except Taxi Package; with 2 Line Pump | |
| 1985 | Chevrolet | Monte Carlo | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1985 | Oldsmobile | Cutlass Supreme | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1985 | Pontiac | Bonneville | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1985 | Pontiac | Grand Prix | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1985 | Pontiac | Parisienne | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1984 | Buick | Regal | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1984 | Chevrolet | Caprice | 5.0L | V8 | N/A | Except Taxi Package; with 2 Line Pump | |
| 1984 | Chevrolet | El Camino | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1984 | Chevrolet | Impala | 5.0L | V8 | N/A | Except Taxi Package; with 2 Line Pump | |
| 1984 | Chevrolet | Monte Carlo | 5.0L | V8 | N/A | with 2 Line Pump; Except Police/Taxi Packages | |
| 1984 | Pontiac | Bonneville | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1984 | Pontiac | Grand Prix | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1984 | Pontiac | Parisienne | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1983 | Chevrolet | Caprice | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1983 | Chevrolet | El Camino | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1983 | Chevrolet | Impala | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1983 | Chevrolet | Malibu | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1983 | Chevrolet | Monte Carlo | 5.0L | V8 | N/A | with 2 Line Pump; Except Police/Taxi Packages | |
| 1983 | Oldsmobile | Cutlass Cruiser | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1983 | Pontiac | Bonneville | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1983 | Pontiac | Grand Prix | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1983 | Pontiac | Parisienne | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Buick | LeSabre | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Buick | Regal | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Chevrolet | Caprice | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Chevrolet | Caprice | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Chevrolet | El Camino | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Chevrolet | El Camino | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Chevrolet | Impala | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Chevrolet | Impala | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Chevrolet | Malibu | 4.4L | V8 | N/A | with 2 Line Pump; Except Police/Taxi Packages | |
| 1982 | Chevrolet | Malibu | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Chevrolet | Monte Carlo | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Chevrolet | Monte Carlo | 5.0L | V8 | N/A | with 2 Line Pump; Except Police/Taxi Packages | |
| 1982 | Oldsmobile | Cutlass Cruiser | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Oldsmobile | Cutlass Cruiser | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Oldsmobile | Cutlass Supreme | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Oldsmobile | Delta 88 | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Pontiac | Grand LeMans | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1982 | Pontiac | Grand Prix | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Buick | Century | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Buick | Century | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Buick | Regal | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Bel Air | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Camaro | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Camaro | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Camaro | 5.7L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Caprice | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Caprice | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | El Camino | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | El Camino | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Impala | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Impala | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Impala | 5.7L | V8 | GAS | N/A | Except Taxi Package; with 2 Line Pump |
| 1981 | Chevrolet | Malibu | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Malibu | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Malibu | 5.7L | V8 | N/A | with 2 Line Pump; Except Police/Taxi Packages | |
| 1981 | Chevrolet | Monte Carlo | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Chevrolet | Monte Carlo | 5.0L | V8 | N/A | with 2 Line Pump; Except Police/Taxi Packages | |
| 1981 | Oldsmobile | Cutlass | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Oldsmobile | Delta 88 | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Pontiac | Firebird | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Pontiac | Firebird | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Pontiac | Grand LeMans | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Pontiac | Grand Prix | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1981 | Pontiac | LeMans | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1980 | Pontiac | Grand LeMans | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1979 | Pontiac | Grand LeMans | 4.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1973 | Chevrolet | Impala | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1972 | Chevrolet | Camaro | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1972 | Chevrolet | Impala | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1971 | Chevrolet | Camaro | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1971 | Chevrolet | Impala | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1969 | Chevrolet | C10 Suburban | 5.3L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1969 | Chevrolet | Camaro | 5.3L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1969 | Chevrolet | Camaro | 5.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1969 | Chevrolet | Camaro | 5.0L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | Bel Air | 5.3L | V8 | N/A | Late production vehicles with a 2 line pump. | |
| 1968 | Chevrolet | Bel Air | 5.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | C10 Suburban | 5.3L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | C10 Suburban | 5.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | Camaro | 5.3L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | Camaro | 5.7L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | Camaro | 5.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | El Camino | 5.3L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | Impala | 5.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | Impala | 5.3L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | K10 Suburban | 5.3L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | K10 Suburban | 5.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | K20 Suburban | 5.4L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1968 | Chevrolet | K20 Suburban | 5.3L | V8 | N/A | Compatible with vehicles equipped with a 2 Line Pump. | |
| 1967 | Chevrolet | Bel Air | 5.3L | V8 | N/A | Late production vehicles with a 2 line pump. | |
| 1967 | Chevrolet | Camaro | 5.3L | V8 | N/A | Late production vehicles with a 2 line pump. | |
| 1967 | Chevrolet | Camaro | 5.7L | V8 | N/A | Late production vehicles with a 2 line pump. | |
| 1967 | Chevrolet | Impala | 5.3L | V8 | N/A | Late production vehicles with a 2 line pump. |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
1605722361742960029296022740725530-8040602-111464410376442081647042268561A11132122TGB0173PM16050MF0049SP1009MP
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.