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How do you replace heater core in a 1993 olds cutlass ciera 3.3 L

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First off, you want to drain the coolant until it is at a level below the heater core. Then you want to remove your glovebox screws and the entire assembly. It may be necessary to remove the far right passenger side kneepad retaining bolt/nut.Disconnect all vacuum and electricle connections.It's a very good idea to take some digital pix during the process to assure proper reassembly.Remove both heater hoses keeping track of which went where. Back inside look around for all the housing bolts for the heater/ airflow control box.If you have AC it is not necessary to discharge the system.Remove all the housing bolts(some may be attached from the outside. I cannot, from here explain the location of each bolt, you'll have to keep looking until you find them all.I did neglect to mention to remove any cable driven door connectors also, if it is so equipt. Put an old towel on the floor of the vehicle because there is inevitably going to be a spill of coolant. When the housing is completely free "roll" it out from under the dash as far as posible and you'll see the heater core opening cover. It will have the two hose tubes sticking out, you couldn't miss it if you closed your Remove the 5-6 screws and slide the core upwards. You'll know how to reassemble the unit by using your pix as a reference. Good luck my friend, I hope this was as helpful as needed. Dana

Posted on Sep 12, 2009


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SOURCE: how do i replace the heater core on 1989 olds

If you dont have the experience and you are a beginer dont do it,go to a auto shop that is qualify.

Posted on Oct 21, 2010

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  2. Disconnect the heater hoses from the heater core inlet and outlet connections in the engine compartment.
  3. Allowing residual coolant from the heater core to drain. Cap the openings.
  4. Working inside the vehicle, remove the lower instrument panel sound insulator and look for where the air blows to your feet.
  5. Remove the heater floor outlet duct screws or clips and remove the duct.
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You can get a Chilton Manual from your Library. The Chilton has Better Instructions than the Haynes Manual. Please Rate my Solution, I need all the Help that I can Get! Thanks!

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