HomeHVAC > A/C Condenser and EvaporatorFour Seasons 54509 A/C Evaporator Core
Part #: 54509

Four Seasons 54509 A/C Evaporator Core

Evaporator Core
⚙️ 14 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$151.74Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Evaporator Core
🚗Fitment: Buick and Oldsmobile, Electra, LeSabre, 98, and Delta 88
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Four Seasons Evaporator Core 54509

The Four Seasons Evaporator Core 54509 is designed specifically for select Buick and Oldsmobile models, including the 98, Delta 88, and LeSabre. This A/C evaporator core ensures efficient cooling performance by effectively managing refrigerant flow within the vehicle's HVAC system.

  • Core dimensions: 10.000 inches width, 7.625 inches height, 2.75 inches depth
  • Material: Durable aluminum construction for corrosion resistance
  • Plate & fin design for optimized heat exchange
  • Inlet and outlet fittings: Male insert o-ring type with No. 12 outlet fitting outside diameter
  • Includes green o-rings [24608] and [24612], plus orifice tube [38623]

Four Seasons Evaporator Core Product Line Details

The Evaporator Core product line by Four Seasons focuses on delivering reliable HVAC components engineered to meet OEM specifications. The 54509 evaporator core features a plate and fin design that enhances heat transfer efficiency while maintaining durability. This product line is tailored to provide precise fitment and consistent performance for vehicles requiring replacement evaporator cores.

Detailed Product Description and Specifications

The Four Seasons 54509 evaporator core measures 10 inches in width, 7.625 inches in height, and 2.75 inches in depth, making it compatible with specific Buick and Oldsmobile models such as the 98, Delta 88, and LeSabre. Constructed from aluminum, this core offers resistance to corrosion and long service life. The plate and fin design improves refrigerant cooling efficiency by maximizing surface area for heat exchange. Both inlet and outlet fittings utilize male insert o-rings, ensuring a secure and leak-resistant connection. The outlet fitting has a No. 12 outside diameter, matching OEM specifications. Included with the core are green o-rings [24608] and [24612], as well as an orifice tube [38623], which are essential for proper sealing and system function.

Common Applications and Issues Addressed

  • Replacement for faulty or leaking evaporator cores in Buick 98, Delta 88, and LeSabre models
  • Resolves insufficient cabin cooling due to evaporator core failure
  • Eliminates refrigerant leaks caused by corrosion or physical damage
  • Addresses HVAC system odors linked to evaporator core contamination
  • Restores proper refrigerant flow and pressure within the A/C system

Installation Notes and Tips

  • Ensure compatibility with Buick and Oldsmobile models 98, Delta 88, and LeSabre before installation
  • Inspect and replace all associated O-rings and seals to prevent leaks
  • Handle the aluminum core carefully to avoid damage to fins and fittings
  • Follow manufacturer HVAC system evacuation and recharge procedures after installation
  • Verify inlet and outlet fitting types match vehicle specifications for proper connection

Quality Assurance and Warranty Information

Four Seasons manufactures the 54509 evaporator core to meet or exceed OEM standards, using corrosion-resistant aluminum and precise plate and fin construction. The product includes necessary sealing components to ensure reliable operation. While specific warranty details are not provided here, Four Seasons typically offers coverage against defects in materials and workmanship. Consult product documentation or manufacturer resources for exact warranty terms.

BrandFour Seasons
Part Number54509
PositionEvaporator Core
Core Depth Fraction2-3/4
Core Depth MM69.850
Core Height Fraction7-5/8
Core Height MM193.675
Core Width Fraction10
Core Width MM254.000
Depth2.75
Depth2.750
DescriptionEvaporator Cores
Height7.625
Height7.63
Inlet Fitting TypeMale Insert O-Ring
MaterialAluminum
O-Ring A Number/Desc[24608] / Green O-Ring
O-Ring B Number/Desc[24612] / Green O-Ring
O-Ring C Number/Desc[38623] / Orifice Tube
Outlet Fitting Outside DiameterNo. 12
Outlet Fitting TypeMale Insert O-Ring
TypePlate & Fin
Width10.000

This part fits 14 vehicles. Search below:

YearMakeModelBody TypeLitersCylindersPositionNotes
1988BuickLeSabreSedan3.8LV6N/AEvaporator Core
1988BuickLeSabreCoupe3.8LV6N/AEvaporator Core
1988Oldsmobile98N/AEvaporator Core
1988OldsmobileDelta 88N/AEvaporator Core
1987BuickLeSabreSedan3.8LV6N/AEvaporator Core
1987BuickLeSabreCoupe3.8LV6N/AEvaporator Core
1987Oldsmobile98N/AEvaporator Core
1987OldsmobileDelta 88N/AEvaporator Core
1986BuickLeSabreSedan3.8LV6N/AEvaporator Core
1986BuickLeSabreCoupe3.8LV6N/AEvaporator Core
1986BuickLeSabreSedan3.0LV6N/AEvaporator Core
1986BuickLeSabreCoupe3.0LV6N/AEvaporator Core
1986Oldsmobile98N/AEvaporator Core
1986OldsmobileDelta 88N/AEvaporator Core

* 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:

0148228010654710657410659311154509V156547156574156574X1565932365932496547273045028806630587643094616309576037701254711354545095654759854765476547N7065477154509770125788066A9719CWK770125EP1063EP20006EV6574EV6593EV6593CEV6593PFEV6593PFCEV6593PFXCEV6622T54509YE6547

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