HomeBelts and Cooling > Hoses and PipesDorman 624-030 Automatic Transmission Oil Cooler Hose Assembly - Inlet (Upper) or Upper
Part #: 624-030

Dorman 624-030 Automatic Transmission Oil Cooler Hose Assembly - Inlet (Upper) or Upper

Inlet (Upper)
17 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Oldsmobile, Pontiac, Buick, and Cadillac, 88, 98, Bonneville, LeSabre, Park Avenue, DeVille, Fleetwood, and Delta 88
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Reliable Automatic Transmission Oil Cooler Hose Assembly

The Dorman 624-030 automatic transmission oil cooler hose assembly is designed to provide a durable and precise fit for select Buick, Cadillac, Oldsmobile, and Pontiac models. Engineered to handle a wide temperature range and high working pressure, this hose assembly ensures efficient transmission fluid cooling and system reliability.

  • Durable metal and rubber hose construction for strength and flexibility
  • 24-inch length suitable for specific transmission line routing
  • Male threaded end for secure connection and leak prevention
  • Operates reliably between -40°F and 329°F temperature range
  • Maximum working pressure rating of 100 PSI
  • Natural hose color for easy identification during installation

Product Details and Specifications

The Dorman 624-030 transmission oil cooler hose assembly combines metal and rubber materials to provide a robust yet reliable conduit for transmission fluid. Its 24-inch length is tailored to fit transmission cooling systems on Buick models like the LeSabre and Park Avenue, Cadillac DeVille and Fleetwood, Oldsmobile Delta 88 and 88, as well as Pontiac Bonneville. The hose features a male threaded end for a secure connection, while the opposite end is designed without threads to fit specific transmission line configurations. This hose is not flexible and does not contain a spring, ensuring a stable and consistent fluid path under operating conditions.

Compatible Vehicles and Applications

This hose assembly is compatible with the following makes and models:

  • Buick LeSabre and Park Avenue
  • Cadillac DeVille and Fleetwood
  • Oldsmobile 88 and Delta 88
  • Pontiac Bonneville

It is intended for use in automatic transmission oil cooler lines, helping maintain optimal transmission fluid temperature and preventing overheating.

Common Issues Addressed by This Hose Assembly

  • Transmission fluid leaks due to worn or damaged hoses
  • Overheating caused by inefficient transmission fluid cooling
  • Pressure loss in transmission cooling lines
  • Cracks or brittleness from exposure to extreme temperatures
  • Improper hose fit leading to fluid contamination or loss

Installation Notes and Tips

When installing the Dorman 624-030 hose assembly, ensure the male threaded end is securely tightened to prevent leaks. Verify the hose routing matches the original configuration to avoid kinks or undue stress. Since the hose is not flexible, careful alignment during installation is necessary. Inspect surrounding components for wear or damage to maintain overall transmission cooling system integrity.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 624-030 transmission oil cooler hose assembly is tested for pressure and temperature resistance to ensure long service life. Please refer to Dorman's warranty policy for specific coverage details.

BrandDorman
Part Number624-030
Contains SpringNo
End 1 TypeMale Threads
End 2 TypeNone
FlexibleNo
Hose ColorNatural
Hose MaterialMetal
Hose MaterialRubber
Length24
Maximum Operating Temperature (┬░F)329
Maximum Working Pressure100
Minimum Operating Temperature (┬░F)-40
Package Contents1 Transmission Line

This part fits 17 vehicles. Search below:

YearMakeModelPositionNotes
1993Oldsmobile88Inlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler; Two Pipes Design
1993Oldsmobile98Inlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler
1993PontiacBonnevilleInlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler
1992BuickLeSabreInlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler
1992BuickPark AvenueInlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler
1992CadillacDeVilleUpperUpper Cooler Pipe to Lower Transmission Pipe without Auxiliary Oil Cooler
1992CadillacFleetwoodUpperUpper Cooler Pipe to Lower Transmission Pipe without Auxiliary Oil Cooler
1992Oldsmobile88Inlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler
1992Oldsmobile98Inlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler
1992PontiacBonnevilleInlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler
1991BuickLeSabreInlet (Upper)Automatic Transmission Oil Cooler Hose Assembly fits Radiator to Pipe from Lower Transmission without Auxiliary Oil Cooler and with Heavy Duty Cooling.
1991BuickPark AvenueInlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler
1991CadillacDeVilleUpperUpper Cooler Pipe to Lower Transmission Pipe without Auxiliary Oil Cooler
1991CadillacFleetwoodUpperUpper Cooler Pipe to Lower Transmission Pipe without Auxiliary Oil Cooler
1991Oldsmobile98Inlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler
1991OldsmobileDelta 88Inlet (Upper)Automatic Transmission Oil Cooler Hose Assembly fits Radiator to Pipe from Lower Transmission without Auxiliary Oil Cooler and with Heavy Duty Cooling.
1991PontiacBonnevilleInlet (Upper)Radiator to Pipe from Lower Transmission; wo/Auxiliary Oil Cooler

* 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:

256067505801115

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.