Heater Core
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CARQUEST Heater Core

Part No. 398003 Warranty Details  

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Please note: Advance Auto Parts is proud to carry comparable exact-fit parts from multiple vendors, as such, the item you receive may be one of two quality brands. Both brands meet the same fitment requirements and are equal in their performance and specifications.

Our heaters are designed and tested to meet or exceed OE specifications for form, fit, and function. Using premium quality materials and a clear focus on the highest heat transfer performance possible, our engineers have designed this heater to perform at the highest standards to ensure a warm cab environment during those cold winter months.
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Core Height:7 1/2 in
Depth:2 in
Inlet Connection Type:5/8 in
Inlet Diameter:5/8 in
Outlet Connection Type:5/8 in
Outlet Diameter:5/8 in
Thickness:2 in
Width:6 in


by PowerReviews

(based on 1 review)

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Reviewed by 1 customer

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(2 of 2 customers found this review helpful)


Not OEM exact match


from Franklin, NH

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3 or more reviews submitted


  • Durable
  • Easy To Install
  • Lightweight


  • Core not secured in box
  • Some fins bent
  • Tubes angle not exact

Best Uses

  • Everyday Driving
  • Replacement
  • Restoration

Comments about CARQUEST Heater Core:

The heater core's exit and entry tube's angles were not an exact match to OEM core. Because of this angular deference the housing had to be modified so replacement core would fit into housing. There is also a bracket connecting the two tubes together that had to be removed for placement into housing. Overall core does work for replacement. The packing of core inside box could have been secured better using solid foam inserts instead of paper and cardboard loosly placed around core.

  • Car & Truck:
  • Auto Enthusiast, Casual Driver, Mechanic

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Do you have questions about this product?


Ask a question, get answers from real customers and in-house experts. For further assistance, please review your support options on our Contact Us page.

4 Questions | 5 Answers
Displaying questions 1-4
  • Q:

    is the heater core cu or al
    Asked on 12/18/2011 by godwinsonny from Woodleaf,NC

    1 answer



      This part Ready-Aire Heater Core manufactured by Ready-Aire,the construction is copper brass and the tank material is brass.
      For compatibility of this part with your vehicle, please provide your vehicle make, model and engine specification.

      Answered on 12/18/2011 by Aaron from AAP
  • Q:

    Will this heater core fit a 1983 Chevrolet Pickup Truck. It looks just like the old heater core from this truck. Is an inch shorter. Also, are the inlet and outlet different sizes and if so what are the sizes.
    Asked on 2/8/2011 by Anonymous

    1 answer



      No, this does not fit your vehicle.

      Answered on 2/9/2011 by David the Dynamite Parts Guy from AAP
  • Q:

    what are measurements of heater core?
    Asked on 12/16/2010 by Anonymous

    2 answers



      The dimensions of the Heater Core Length (in) 7.500" inch, Heater Core Width (in) 6.000" inch, Heater Core Thickness (in) 2.000" inch.

      Answered on 12/17/2010 by Anonymous


      The dimensions of the Heater Core Length (in) 7.500" inch, Heater Core Width (in) 6.000" inch, Heater Core Thickness (in) 2.000" inch.

      Answered on 12/17/2010 by David the Dynamite Parts Guy from AAP
  • Q:

    DO this heater core fites 88 cutls part num 398003 ? An where can it be found?
    Asked on 11/26/2010 by james from rockymount N C

    1 answer



      This is not for your vehicle. It should be behind the dashboard of your vehicle.

      Answered on 11/29/2010 by Mike the Auto Parts Master from AAP
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