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260z heater core?


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I don't know if there are any significant differences with the 260z, but the 1971 Supplemental Manual has a nice section on how to remove and replace the heater and core that would probably be worth a look. At least for the 240z, dash removal was not required. You can get a copy of the manual at


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I did the heater core in my early 260z recently and took a bunch of pictures. Check it out: https://sites.google.com/a/thecomputerrehab.com/260z/Interior/heater-box-rebuild and especially the last pic on this page: https://sites.google.com/a/thecomputerrehab.com/260z/Interior/heater-plumbing

I would absolutely plan on changing all of the small hoses down there. You should be able to do the work without removing the whole dash, but if you have other things planned now might be a good time to remove it.

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I don't know if there are any significant differences with the 260z, but the 1971

Wow - Looking at the pictures Kurbycar32 linked to - the early 260Z heater is quite different. Instead of the end of the heater box coming off as in 70-73 - - the 260Z heater box splits in half.

Anyway you look at it - replacing the heater core is one of the Less Fun jobs on either of these Z Cars.


Carl B.

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It does split in half if you want it to but there is also an access panel for removing the core without yanking the whole box. On that last picture notice the raised area near the flap and water valve mount, that all comes out as a unit. One other word of caution: I was never able to find a decent heater core at any regular auto parts store. Autozone had a model that didnt even fit and the rest of them (napa, kragen/oriely/advanced) kept giving me corroded cores. Eventually i found a good replacement at a local radiator shop and they pressure tested it on the bench in front of me before installation and it still wasnt a perfect fit so i shimmed it with rubber.

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