JSM Posted March 15, 2010 Share Posted March 15, 2010 Has anyone tried adapting a 280z A/C system into a 240z? I can get all the components from a stock 76 280z. I found this topic, but not sure if anyone has actually done the swap. http://forums.hybridz.org/index.php?/topic/7890-240z-stock-ac-vs-260-280-acs/page__p__57188__hl__280z%20AC%20system__fromsearch__1entry57188 Quote Link to comment Share on other sites More sharing options...
Ed260Z Posted March 19, 2010 Share Posted March 19, 2010 I've actually taken the complete HVAC out of a 77 280z to put into my 260z. Although I've never had a chance to install it, I have been able to tinker with it. The "Box" in the dash is the same except for the provisions for the A/C piping. However it does use a diff heater control valve, and some of the controls are vacuum operated. I don't see why it wouldn't be able to work. I would suggest that you get every part of the HVAC out of the donor car. Including the wiring harness. Quote Link to comment Share on other sites More sharing options...
JSM Posted March 19, 2010 Author Share Posted March 19, 2010 Just brought the car home tonight. Screwed my knee up too! Such is life. When you say wiring harness the whole chasis harness or just the A/C harness if there is such a thing. I'm not running heat. Quote Link to comment Share on other sites More sharing options...
Ed260Z Posted March 19, 2010 Share Posted March 19, 2010 When you say wiring harness the whole chasis harness or just the A/C harness if there is such a thing. I'm not running heat. The A/C controls run through the chassis harness. I split the harness open and traced the wires from the controls to the A/C compressor. A good wire schematic is advised because some of the wires to connect to other systems. Quote Link to comment Share on other sites More sharing options...
Ed260Z Posted March 19, 2010 Share Posted March 19, 2010 Just brought the car home tonight. Screwed my knee up too! Such is life. Just wanted to add that my "Donor" was a rotted out POS not worth saving Quote Link to comment Share on other sites More sharing options...
wal280z Posted March 19, 2010 Share Posted March 19, 2010 When you say wiring harness the whole chassis harness or just the A/C harness if there is such a thing. I'm not running heat. Things I have noticed doing the swap in a 280 The fan has four speeds instead of three. The additional resistor is in the fan housing. The fan housings mount *slightly* different between the two models. You may want to keep the 240 fan housing but swap the motor out. The 240 control panel and the 280 control panel are completely different. Grab the bezel while you are at it and see if it bolts up. I haven't lined it up, but the location of the water ports for the heater appear to be slightly different. I'm sure the connectors may have changed so you may want to grab additional lengths of the wire harness The factory stuff has the vacuum control valves and reservoir bottle in the engine bay - not sure if you want to run those Make sure you trace out where the holes are in the firewall so you can cut them in the same location on your 240 firewall The 280 heater housing has mounting bolts that go through the firewall whereas the 240 has welded nuts on the inside - it appears in the same location - but check to confirm. (finding all of this stuff out while doing my own swap...) The 280 *should* bolt up to where the 240 heater housing mounts to the top of the cowl Of course, the FSM is uploaded somewhere to get the technical details on the AC system from the 76. It's not a bolt in - but it's close enough to work, in my opinion. Quote Link to comment Share on other sites More sharing options...
JSM Posted March 20, 2010 Author Share Posted March 20, 2010 Thanks guys. My donor car is beyond hope as well. I only paid $100 for her though! Parts city! Quote Link to comment Share on other sites More sharing options...
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