Question about 1990 Nissan 300ZX
That does sound like a heater core issue. It's buried inside the dashboard on the passenger side - you'll likely have to remove the entire dashboard to access it. If you look under the hood, back at the firewall on the passenger side, you should see two hoses coming out of the firewall and into the back of the engine - these come out of the heater core.
It's a job that anyone with some basic knowledge and a decent set of hand tools can definitely do at home, but it's labor-intensive and will take quite awhile. Plan for a full day and maybe part of the next to do the job.
Posted on Jul 27, 2008
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Posted on Jan 02, 2017
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