Zed Head

I guess it boils down to why you're picking a venue for selling a car. To take home maximum money or to be a part of a good show.

Could have been an attempt to fix the leaky head gasket. Did you crack a bolt loose? How do you know they were overtorqued? Things don't fit - 30,000 original miles is barely broken in. No reason for an HG to go. Unless there was detonation, maybe from low octane fuel. As I understand things though, that usually blows 5 or 6. Check for signs of the head being off in the past. Something's odd here.

So it's not out yet? One way to make sure you use minimum heat is to put force on it while you do the heating. It will let go when you just hit the right amount of heat.

Seems that people are bashing the BAT site because they don't like some comments that they saw. Doesn't make sense. If the seller gets his asking price, with low fees, who gives a ____ about the comments?

All it takes is one overheating and a head gasket can blow. Maybe the first guy wasn't such an "A-hole" after all. Did the engine ever overheat before the car "broke"? Never really said what the original problem was.

@zeenubee Six years. Probably feels like nine though.

You're implying that the head gasket is blown between 3 and 4. That would explain Dave's observation. The GOOD! news is that the cylinders, pistons, and rings seem to be in good shape. Looks like head removal is in order. FUN!

That's a bummer. The rest of the motor is so shiny and new. Is that in 5 or 6?

Lash gets tighter when the engine warms up. Might be that the PO ran it hard because it was running poorly and "burnt" some valves. That just means warped from uneven heating cause they weren't seating all the way. Not good! Looks like lash gets about .002" tighter after warmup. So, you'd have valves hanging open by your numbers. Might be too late.

I meant the balls in the races. The play between the inner race and the outer race. You'll be using the outer race for location but the inner race to support the cutter head. Any play in the bearing itself will affect cutter head location. Might be better off to cut a plug that fits the 56 mm bore then cut a hole in it. Convert the Nissan ball bearing to a bushing. Get rid of the balls. Not sure but I think that somebody might have inferred that already... Or...I just didn't comprehend what's going on.

Doesn't the Nissan bearing have some play, that will affect the cutter's precision? I used that concept to hog out the clearance on the front case for a 71C swap, using a grinding disc, some all thread, and a hand drill.

That ad is confusing. Is the car for sale for $15,000 now? Not $18,900?

Does the shifter that didn't work have a mark/notch on the back where it was impacting the case? I had a 76 4 speed shifter that worked on a 76, 78, 81, and 83 transmission. Just trying to understand, doesn't make sense. siteunseen took a grinder to his shifter and made it work better. @siteunseen

Like this one. http://www.kangamotorsports.com/blog/2016/11/datsun-cylinder-head-disassembly

Not so sure. The base circle has wear marks, indicating that it had some force on it. The base circle is usually dirty since it only has the force of the mouse trap spring on it when lash is correct. I don't see a feeler gauge.

Check valve lash. It's the first procedure in the tuneup chapter.

Use heat. Makes a huge difference.

Too many possibilities. I'd get one running first and see how you like what's there. There's a ton on the internet about heads and cams and carbs and stuff.

I think it depends on which heads are on the L26, for power estimates. The stroke is longer, bore the same, but, apparently, the L26 was developed as an emissions engine, in the beginning. Usually there's "no replacement for displacement", so, with the same parts the L26 should make more power. Choices are really about the goal. Lots of possibilities.

Good find. I assume that you meant the electrodes in the cap, not points. The moisture is probably what killed the spark.

Just posting for thought. The surfaces.

Should be interesting. When I had a 1985 71C from a 300ZX I thought that it had a good balanced spread between gears. Never got to try it though, https://spicerparts.com/calculators/transmission-ratio-rpm-calculator

Just like the coolant sensor. You have to get the numbers at the ECU plug. The ECU determines how long the injectors stay open. They do that based on what's coming in through the connection to the harness. You're on the very well-worn path of people new to the Datsun EFI. Trying one thing at a time. By the end you'll have measured all of the things you need to measure, just in two weeks time instead of two hours. No offense, it is very common. Your symptoms are also what happens when the ECU goes bad, or the connector gets loose. People have fixed it, temporarily, by banging on the side of the ECU. If you had all of the test results and they were in spec. then replacing the ECU would be the last resort.

It's just a 240Z engine that's been "stroked". The first Z "stroker" engine.

How much? BAT would give you a bigger audience and probably a better price with lower fees. People seem to like it. https://bringatrailer.com/