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I replaced the heater core on my 1985 300zx a few years ago. It was a nightmarish job. It is located centrally behind the center console. The actual heater core is located in a housing and only takes a half of an hour to remove and install in the housing. But to get to the housing is a long task which involve removing everything in the way to get to it. I had to loosen steering column and loosen the entire DASHBOARD assembly to the point that it could be lifted high enough to remove the housing. There was a great number of bolts that had to be removed which required me to ly flat on my back and work upside down in the drivers seat. I am not a big guy and it was an awkward task. It took me 6 to 8 hours to remove everything because I was working in tight quarters. I t went back together more easier because i had an idea where everything went and a tagged my parts so that I new which bolt went where. It probably a 700 to 900 dollar job at a good mechanic. I dont think I would attempt again.

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Q: How to remove heater core from a 1984 300 zx?
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