Av8ferg

L28 full rebuild assembly

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    Yes, the block is painted. DE1651 Cast Coat Iron from Duplicolor. I didn’t really like the look of the Datsun turquoise blue, I thought it clashed with the red engine compartment. Blasphemy to some of the Datsun hardliners but it’s a 77, not a series 1 collector car. I really like the look of this block color. I have a red powder coated valve cover and I think the colors go well together.

    bd13ab622685fd3fd3bce0b9b8276b3a.jpg


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    Agreed Looks great!

    Now that you have the timing chain on, you can turn the motor over all the way. Did you spin it a couple times just to watch the valves open and close?

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    Hey guys a couple questions. I’ve disassembled the thermostat housing assemblies for cleaning (probably going to put them it in a media agitator / tumbler because it has a lot of corrosion, oil and coolant residue. It was really hard to remove those sensors.
    So there are several sensors in this thing.
    1. Thermotime switch
    2. Water temperature sensing switch
    3. Thermal Transmitter
    4. Water Temp Sensor.
    5. Thermal Vacuum Valve

    Seems like a lot of redundant sensors but I plan on replacing all of them. Actually will clean and test the Thermotime switch first because that one is pretty expensive.

    So there is another sensor that that goes on on a block just above the Thermostat housing. It has two wire coming out. Reading online it’s another Water temp switch and is used as part of the EFI?. I was reading the EFI bible and it seems to be written for a 280z not the ZX. I realize the concepts are the same but it seems these sensors and switch might be in slightly different locations because the pics in the Bible of the sensor housing are different than what came on my 82 L28.
    Can anyone clear this up. See my pics
    My initial impression is that the TVV and the Water Temp Sensor were put in the wrong place. The TVV isn’t supposed to be on to the Thermostat housing but on the other component.
    Thoughts? a82cf42bcee56b02af22a5e244fe0144.jpg

    e0eda4681c9a3f61774b0b3f68e498fb.jpg9f6280044def5f69742e6c4bf2eaf900.jpg



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    Took the pic out because I think they DID move the TVV into the thermostat housing.

     

    Edited by Captain Obvious

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    At least that's the 280-ish version of things. They may have started mounting the TVV up in the thermostat housing for the ZX's.

    When I get a chance, I'll look through other pics. Unless a ZX guy can come in and answer first.

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    Off the top of my head.....
    tempstuff1.thumb.jpg.5df69b4f3f4f7972c9325c2c4cf4efae.jpg


    I think the big one is the Thermotime switch, not the one going into the block.
    You think there is enough temp sensors on this thing...OMG!


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    Yeah, I'm not sure now. I took a quick look at some old pics when I took my 83 apart and the TVV is up in the thermostat housing, so my pic with the notes on it is wrong (in at least one area).

    I'll take a deeper look into my old pics when I get a chance.

    I do think the long snout sensor is for the EFI though. It fits into the dry thermowell near the back of the head. The beveled nose is supposed to bottom out in the hole for good thermal contact.

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    Okay, we’ll I just removed it from the thermostat housing. I guess the PO had stuff in the wrong place.


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    What goes in here?  Maybe the vacuum switch?
    image.thumb.png.68593fc2f3102fbb5b9eb62c72024887.png

    It appears to have a hex plug in there
    e903b98d6aa9d1ee77233d83775ec85a.jpgee9ca6c760a33803f75c4ef39355290c.jpg


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    My '82 housing had the TVV in it. 

    1 hour ago, siteunseen said:

    What goes in here?  Maybe the vacuum switch?

    image.png

    I wish i took pictures from before I removed that engine from the car.  I probably am totally wrong, but I want to say that the valve cover breather goes into a fitting attached to that, as opposed to the earlier valve cover breather to throttle body. 

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    I think this might be the accurate configuration.

     

    BTW, the large one is the thermo time switch because I won’t fit in the head location. This set-up looks to match the publications.

     

    3320bfe09ebe32f1cac3bd4e5cb8d054.jpg&key=47d8de78a7ea615bc4c7f7676023656075f17d188dbc7a0e8dbcdec2d11bbd7941bdcd6ccf800313187697e41a762db2.jpg&key=fbccc3fc20492a34ba1991f333c8297999608c53e4364781dcc797fddb1aad2e8513c60982d17b9ce7948335586923eb.jpg&key=5cd60ae489bb89a06538d20c6db80c0a80d08492ad9e35028e51856983d4ab24fce466238e8ba4b49f3e99e2d3a766fd.jpg&key=8416081d67cf02d595447f02a339ea4b5b421d5817cdc05cce4f9c54983d6492

     

    8e67b326862626c4f96490abf60befcc.jpg

     

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    So after some research in the 1982 FSM (same year as my engine). The thermostat housing has an extra sensor. I’ve circled it in the photo below. This sensor is connected to the blower fan that goes over the valve cover which attempts to cool the intake to prevent the hot start problems these motors have due to exhaust manifold proximity.
    I think I’ might just get a 280z housing and sell this one online or just leave it disconnected because I don’t intent to use the blower.
    d730a04adfbdd8da89821bf021982833.jpg


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    This is off a '79. Very different it looks like?  This one didn't have injector fan over the valve cover.
    20200202_151229.thumb.jpg.de15c979ef4e3c6e5061371c07dcd51b.jpg
     

    Interesting that there were so many minor changes. I discovered while researching this that ZX series cars had many more small changes than the 280Z series.

    I’m going to my yard with the three 280z’s and a the 240 this week. I’m going to grab a housing out of there.

    If anyone has a request, please let me know. These 4 cars are mostly untouched so it makes for a great place to get hard to find or expensive parts.


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    So today was the plan was to get my oil pan cleaned up, painted and installed on the engine. Many thanks to Wayne on the forum who graciously donated an oil pan to my cause. He told me he donated oil pan from a 1977. I need a new pan because mine has some serous dents and what I thought might be a small penetration, from the yard banging it around. So when I was out cleaning these oil pans this morning I noticed that the ZX will is significantly different than the Z pan. I was wondering are there any serious compatibility issues that would forgo me being able to use this Z will pan on a 82’ F54 block if anybody knows please let me know before I sand, prime and paint this 77 pan. thank you. See pics. 77 on left 82 on right. b21977efa8da4c80b473d9e67c5f8502.jpg54c93949d34a180db4b4141f93c822cb.jpg


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    Awesome, so not a factor on my 77 body. I don’t have power steering obviously. Thanks


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    I've done a little digging on the subject (because I'm in a similar situation), and my understanding is that any pan will bolt up to any block just fine. There are some issues however...

    First issue is fitment into the car. Either the original (middle sump) Z pan OR the rear sump ZX pan will work in the Z. But the converse is not true... The middle sump pan will not work in the ZX. But since you're putting the motor in a Z (and not a ZX), either pan would fit fine.

    Other issue is that I (believe) you need to use the correct sump pickup tube for the pan. In other words, if you're using a middle sump Z pan, you need the middle sump pickup. (And conversely, if you're using a rear sump ZX pan, you need to use the ZX pickup.

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    MSA shows one for '79 through '83.  No picture and out of stock.

    https://www.thezstore.com/page/TZS/CTGY/classic14b

    I've got a ZX one out in my storage building but it's raining and I'd have to drag a bunch of stuff out to get to it.  I will go out there when it quits and see if I can find it.

    Edited by siteunseen

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