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I need to replace the Expansion valve on my 2000 Chevy Malibu. I need help finding it

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The expansion valve or fixed orifice tube as GM calls it is located at the inlet to the AC evaporator core at the firewall, u must remove the high pressure AC lin/hose (smaller of two hoses from compressor) and u will see it down inside the inlet tube of the AC accumulator, there is a special tool required to remove the tube, be careful when u try to get it out, if u can't free it with long nose pliers buy the orifice removal tool from a tool dealer or see if a local parts store like Napa or Carquest has one, don't force it if u ruin the evaporator inlet you will need to pull the dash to replace it. I am curious why u are replacing this, the only thing that can go wrong with them is that they get clogged up from a failed AC compressor, if it is full of black gunk you must flush the whole system with AC flush and compressed air, there are a number of diff orifice tubes, contact a GM dealer parts for the correct one for your car or just use the color code of the part to ID the one you need.

Posted on May 27, 2010

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