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st0878

Where do these hoses go?

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This is an 1981(2) engine that had very few miles before the car was totalled the same year it was purchased. THe engine was boxed and stored in a wharhouse since then. The engine still had the original oil and in it and is in mint condition. I am getting ready to transplant it into my 76 but there are some vacume hose connections that I'm not sure where they should go? Also I had an AFM boot that looked like it was for this engine but I'm not sure. Also if anyone knows what year this engine is fur sure then let me know. F54 block with P79 head. Thanks in advance for your help. :classic:

http://www.classiczcars.com/photopost/showphoto.php?photo=17258

http://www.classiczcars.com/photopost/showphoto.php?photo=17260

http://www.classiczcars.com/photopost/showphoto.php?photo=17261

http://www.classiczcars.com/photopost/showphoto.php?photo=17263

http://www.classiczcars.com/photopost/showphoto.php?photo=17262

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st0878,

I have just about finished with a very similar engine swap as yours. In my case the engine from my old '82 280ZX was transplanted into a '78 280Z. The first thing you'll have to do is remove the old intake manifold as it will not work in a '76 280Z. In my case the intake manifold from a '75 280Z (no EGR fitting) was used however, you can use the the fuel rail from the ZX engine with its injectors on your '76 intake manifold. I ended up installing new Nissan injectors and the o-rings for the injectors were replaced. Once you remove the fuel rail you should at least replace the O-rings since re-using the old ones would not be a smart thing especially since they are this old.

In one of your pictures the water temp sensor/ thermo. time switch shows two fittings for vacuum lines. I will have to check mine and report back to you. I noticed the distributor is not on the engine? Not a problem but, in my case when the '78 280Z distributor was installed it was one or two teeth off from the oil pump and the spark plug wires had to re-routed (I have to drop the sway bar and remove the oil pump and reposition it to match the distributor and check the timing before all is said and done).

Also, do not be alarmed when you look at the side of the block where the spark plugs are located and notice the fitting just below cylinders 5 and 6. On the 280ZX's I believe that was the cylinder head temp sensor and you won't be hooking anything up to it in your '76 280Z. Another item you can remove is the injector cooling fan and duct work that snakes over the valve cover.

If you have a chance post the engine block serial number and this may help to determine what year ZX the block was installed.

I hope that helps and in the meantime I will try to get some pics uploaded of my engine swap.

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Wow that was great! I had no idea that these other mods may be required. Was the ZX that you transplanted a turbo? I don't understand why the intake would have to be replaced? I was planning on putting in the distributor that I had on my 76 into the new engine and plugging up my headers in the place of the ZX exaust (maybe plug the EGR for now till I can afford another header with EGR). I am assuming that injectors on the new engine would be low flow and not the high flow turbo ones. What is the rule that you used to determine correct distributor orientation? TDC vs plug one fire? Your really getting me down becase I thought the transplant would be a little more plug-n-play than it may be. This engine is in such pristine condition that I didn't want to have remove anything and replace it with parts from my old dogged out 76 engine with 100+ miles on it. Anyway thanks for helping me realize the full scope of the project.

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