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Heater Core Replacement Removal Procedure
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten Tighten the heater core line clamp screw to 1.5 N·m (13 lb in).
Tighten Tighten the heater core mounting clip screw to 1.5 N·m (13 lb in)
Tighten Tighten the heater core cover screws to 1.5 N·m (13 lb in).
Tighten Tighten the heater core outlet cover screws to 1.5 N·m (13 lb in).
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Correct. I added a few pictures at the end. My apologies as I'm having an issue with the pictures not uploading with the text. The 2001 monte carlo is also a W body and the procedure is almost exactly the same other than a different console arrangement.