Zed Head

I think that most of use already know who the vendor is. Which parts? Pistons? Rings? Valve seals? What brand were they? Or did you buy a complete head?

Which stuff? You don't have to mention the vendor.

I had the same question. Looks like he checked. Kind of sounding like the wrong rings were used or somebody made a mistake somewhere. If you're going to swap engines you might just take it out and beat on it for a while. What harm can it do? Maybe you'll get lucky and the rings will seat and start sealing properly.

Can't tell what is directly above the leak areas, gravity-wise. Were you parked nose down? Be the water. I found that water could get in to the window seal in one spot and travel through the gap between rubber and glass to exit somewhere else. Happened on both the front and rear windows. The hatch hinge area is leak prone, apparently. Somebody just posted recently, asking how to install new rubber there. There are seals, left and right. 30 and 31. http://www.carpartsmanual.com/datsun/Z-1969-1978/body-260z-280z/2-seater/tail-gate-bumper/sep-74-to-jul-76

R2D2's beep-beep-boop.

Actually, it's better to put your pointer next to the rim for side to side wobble. And, you can also take the wheel off and use a more precise indicator on the flange itself. Or you can clamp a long lever on to the flange so that the movement is amplified, and use a less precise indicator. Many possibilities.

🎲🎲

👀 first.

You could have a bent hub flange or axle. It happens. Setting up a crude runout measuring device would tell you. Jack up a wheel, place a block some kind next to, put a stick on top and place the end close to the tire and/or the rim. Spin the tire and watch the gap between the stick and the wheel. Do the sides and the tread.

You're using precise numbers on initial timing, 10 and 15, but no numbers on the rest of the curve. And your test doesn't tell you about anything parts sticking. Sticky throttle plates are common. A new path to follow...

I don't know anything about your car's history. I'm just pretty pretty pretty sure that Nissan did not use fuzzy fabric on the visor. I could be wrong. You can probably feel the screw under the fabric if you squeeze in the right spot. Cut a tiny hole and stick a screwdriver in. Looks like somebody just sewed new fabric over the old vinyl. Probably made it heavier, so more droop-prone.

Really depends on what your goal is. I'd still take the breaker plate off and have a look inside just to be sure you know what you're working with. I collected quite a few and most of them had a stuck breaker plate (no vacuum advance), and crusty gummed up centrifugal advances. Might be why your idle speed is changing.

Intake vacuum is a diagnostic tool, not a target. You should know your distributor's vacuum and mechanical advance curves to help decide where to set your initial timing.

Nissan didn't use fuzz. You know where it is...

I am not implying that you should buy a reman computer but I just wandered across this on the internet. Apparently somebody is producing remanufactured ECU's. In "reman world" that could mean anything from all parts that degrade over time have been replaced to all parts have been tested and left in place if they worked. If you bought an ECU from ZSpecialties it was almost certainly a used one. Oliver has a huge collection of used Z's and Z parts, apparently. Anyway here is that link, just for future reference. Do lots of testing first. https://www.autozone.com/engine-management/engine-control-computer/p/bse-engine-control-computer-ecc1450/53480_0_0

When you check the wires at the ECU you're checking exactly what the ECU sees. If it's not right then you move down the wires to find the source of the wrong numbers.

Sitting in the driver's seat the plastic panel would be directly left of your left knee. It has a rectangular hole in it that allows you to see the tag on the ECU. There are two or three screws holding it, one of them does not need to be removed all of the way. Borrowed this from the BAT 8000 mile Z.

Did these pros run through the tests in the EFI Book by Nissan? Easy to do and you might find something. Might be you just have a bad connection at the coolant temperature sensor. You can sit on the ground and reach in to get to the connector. Hardest part is getting the kick panel plastic off. You didn't answer the question about the age of the replacement ECU. If the failures are due to age of parts then all of the parts are the same age so have the same odds of failing. p.s. I've found that piece of solid core copper wire, flattened, works well to get in to the connector pins. They're tight.

No, I never did the rear disc swap. I hadn't heard much about Milkfab until now. Looks like they have some interesting products. https://milkfab-engineering.com/shop/ols/products/datsun-240z-260z-280z-rear-big-brake-kit https://milkfab-engineering.com/shop/ols/products/2005-2014mustangbrakecaliper Hope they/he make(s) it. Many don't, running a small Z car focused fabrication business seems to be tough. https://milkfab-engineering.com/about-us

The rotors are interesting because they can be off center and still work just fine. The pads will not know., they'll just create a new circle. There could be a very slight weight imbalance.

I looked but did not see anything. Tried all of the words - seal, gasket, filler, oil... Got nothing. Edit - I tried again, working my way through their new website sub-menus and finally got to the secret link. Wrongness and unavailable. Gaskets and seals > Oil cap > o-ring https://www.thezstore.com/category/552/gaskets-amp-seals https://www.thezstore.com/category/789/oil-cap

You probably meant ZCD. MSA has nothing. Who knows what "new" means. The cheap one looks like a hardware store flat gasket. https://zcardepot.com/products/oil-cap-gasket-seal-oem-240z-260z-280z-280zx?_pos=8&_sid=583fc178d&_ss=r https://zcardepot.com/products/oil-cap-gasket-seal-240z-260z-280z-280zx?_pos=5&_sid=583fc178d&_ss=r A person could probably find something that would work on the old internet. https://www.mcmaster.com/products/gaskets/

I have a truck with hub centric wheels that uses flat faced nuts to hold the wheels on. Torque spec is 150 ft-lbs. It's an interesting topic. One of the first of my many cars had a set of mag wheels with replaceable adapters for different patterns that fit in a recess in the wheel surface. Very sketchy. Most of my cars back then had numerous vibration problems so I never noticed if the wheels were one of them. Found a picture of a similar wheel. https://inthegaragemedia.com/rolling-stock/ Here's a Ford hub centric lug nut. The hub centers and helps out but the nut and lugs do most of the work. This is aftermarket, the Ford nuts have a spinning seat with some grip texture on the face. Still flat.

Nissan didn't mention the hydraulic pivot until the 1983 FSM. It only has one nut.

So it's basically a counterfeit part sold out in the open on eBay. Nissan packaging. I see that the guy put some stuff in the description. Still looks like a cover-up for somebody to buy counterfeit Nissan parts for resale. No need to spend time on the packaging if you're telling the world it's a reproduction. Item description from the seller I needed a gasket for my original oil fill cap for my Datsun 620. The original part number 15270-78500 is now discontinued, so I looked at a picture and took some measurements, then made my own. Maybe someone else needs one too! My part number here is 15270-78501 to denote a variation of the original part. I've used this on my truck for a couple weeks so far with no issues. Made from Overture brand TPU. This should work for any vehicle calling for the original part number with the original cap. I tried to select all vehicles based on what NissanPartsDeal says these are supposed to fit. If using the elephant logo cap, the ridge goes into the cap, but the Nissan lettering cap, the ridge should go towards the valve cover. Feel free to contact me with any issues, suggestions, or requests!