TwinTurbo.NET: Nissan 300ZX forum - okay...this is all from memory but here it is.
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Subject okay...this is all from memory but here it is.
     
Posted by musky on November 23, 2005 at 11:59 PM
  This message has been viewed 734 times.
     
In Reply To Can you outline some of your steps, please?... (n/m) posted by z32ttvert (MWS Motorsports) on November 22, 2005 at 08:08 PM
     
Message -remove both heater hoses, and firewall grommet
-remove lower dash panel below steering wheel
-remove both black heater ducts in drivers footwell
-if you look up under the dash, just behind the stereo area, there is a little black a/c computer with four plugs, label the plugs 1-4 from firewall-stereo, then remove 2 or 3 screws that hold it(i cant remember how many)
-there will be a black panel over the heater valve held on with 2-3 screws- remove that
-loosen the screw that holds the tension spring on the heater valve arm, and remove spring.
-remove one screw that holds a tab to hold core in box.
-remove the pipes from core(4 screws each, leave the valve on the pipes, as its a pain to remove, and is usually fine).
-since the hoses are gone already, you should be able to wiggle the pipes to the sides a little, and wedge a midsized screwdriver in each to hold them to the side.
-slide out the heater core
-remove OEM pipes and valve from new core.
-slide new core in, put a thin bead of rtv on flanges with the newer rubber gasket/ring.
-screw pipes back into core
-reinstall heater hoses, and start car
-manually operate heater valve with engine warmed, and look for leaks
-if all is good, reverse order of removal to finish.

     
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