Question about 1997 Saturn SL

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Liking flude out of heater core how to fix free instructions

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  • relentlesssh Mar 06, 2009

    step by step instutions for free

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Actually, the only way to fix this delicate piece of machinery is to replace the whole heater core unit. its the safe and best way. here are some step by step instructions on how to remove the old one. i also included instructions for installation of the new core as well. a fix ya rating would be most appreciated.


Remove the Old Core Step1 Drain the cars engine coolant from the water pump (remove the surge tank cap and drain bolt). Disconnect the heater outlet and inlet hoses by removing the clamps. Step2 Disconnect the Body Control Module. With the battery disconnected, parking brake on and transmission in Neutral, detach the entire front console, pull back the carpet to the right of the left dashboard support bracket and remove all the BCM's connectors and retainers. Step3 Pull back the carpet below the left dashboard support bracket. Remove the gas pedal from the front of the dash, then remove the center floor outlet ducts. Disconnect the main center floor duct from the heater/air conditioner module. Step4 Remove the heater core cover, from the HVAC module, sliding it away from the module locating pins and rearwards until the drain tube clears the dash front. Remove the heater core from the cover. Install the New Core Step1 Install the new heater core and reconnect the core cover. Use a new drain tube seal on the drain tube. Spray the core seal and dashmat with soapy water to make installing easier. Step2 Reattach the center floor ducts and the gas pedal. Install the Body Control Module and the front console. Step3 Connect the outlet and inlet hoses to the heater, replace the surge tank cap, fill the cooling system and connect the negative battery cable. Step4 Operate the cars engine until it reaches normal operating temperature. Watch over the climate control operation and check for any leaks.

Posted on Mar 06, 2009

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Step by step instruction to replace heater core 1998 oldsmobile 88


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