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TJ Heater Core Replacement #2

by Taka Sokabe

Disconnect the vacuum supply line connector, which is right beneath the AC lines in the engine room.

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"CAUTION: discharge AC refrigerant before disconnecting AC lines! This needs special tools or professional support."
Remove two AC line connector covers.

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Disconnect AC lines. Insert 5/8 disconnecting tool to small and 3/4 one to large line, respectively. I used "Lisle 37000 Air Conditioning/Fuel Line Disconnect Tool Set".

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While inserting the disconnecting tool, pull the line on the right side until you see gasket (green in this pic). This step gets easier after removing two heater/AC unit mounting bolts securing AC accumulator (beneath the two A/C lines in the pic), by which the large line becomes more flexible. If you want to dismount AC accumulator, skip this and do the following several steps first....

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After relocating the spring clamp (arrow) using a channel-lock pliers, disconnect the upper heater hose. I coated the connection part with hot soap water and twisted the hose left and right using channel-lock pliers. Covered the hose with towel to prevent from damage.

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