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Somewhere along the line I remember seeing a quality control checklist used by Nissan for the program. Maybe that would provide some insights? Google search links me to what appears to be the New Zealand Z Car Club and no permission to view the attachment to the forum post which is a copy of the checklist. I vaguely remember seeing it on here somewhere but cant find it.

I love the fact you get the kids involved in rebuilding the Datsuns. Keeping the hobby alive going forward is getting harder to do. Let's hope they keep up their enthusiasm.

Roo - You're correct, and I know from first hand experience, Pierre wasn't amused! Many moons ago I serviced 2 of the Z Store cars and just can't remember what exactly I did to them. If I did a valve adjust to one or both and found little or no adjustment room left for the exhausts that would have told the tale about valve seat replacement, but............

I hope this doesn't feel like "doxing" but I found the place you bought the car from. Not that you're hiding it, it's pretty obvious. The ad copy says that it came with Restoration literature. There's a picture of what looks like photocopied pages. Is there anything in there about the engine details? Or is it just vague statements about remanufactured engines? Somehwere out there is some old AER Nissan reman engine paperwork that tells exactly what is done. They were used on more than just the Restoration program cars. I'm here for the puzzle.

Here's a different AER page. It's from 2002 and "Not secure" so can't tell if it's just an internet artifact or current. http://dealer.aermanufacturing.com/manufac/remeng.html They do have a Contact page though. Might send them an email and see of they have some documents. http://dealer.aermanufacturing.com/contact/index.html

Looks like AER is getting absorbed in to bigger corporation. Contracts with Ford and Stellantis. No contact means on their web page. Documents and old-timers probably disappearing. https://www.aersales.com/company-history/ The History page has some odd references but Nissan did get a mention. I assume that it's for all Nissan remans. So, maybe any Nissan reman documentation would be relevant. Not just the Restoration program.

Here are two descriptions showing the possibilities. https://gaynors.com/auto-repair/engine-rebuilding/ "Valve seats are replaced with hardened seats..." https://www.budgetenginerebuilders.com/ "Cylinder heads reconditioned with new bronze guide liners, valve springs, valve stem seals, resurface of valves, seats and head gasket surface area..."

There are different levels though. Sometimes valve seats are checked for wear and just recut, or if they look okay they might just be lapped. Sometimes they are removed and replaced. That's the question at hand. If they were all removed and replaced as part of the rebuild, and the program was done after hardened seats were introduced, then they probably have hardened seats. An old AER document probably has the information.

AER Manufacturing in Carrolton, TX remanufactured the engines. Williams Technology in Summerville, S.C. rebuilt the transmissions. (Williams Tech was bought by Caterpillar circa 2004/5) Both were existing suppliers to Nissan. https://www.aermanufacturing.com/ https://www.ame.org/sites/default/files/target_articles/92Q6A4.pdf

A couple of pages from period Japanese magazines which covered the 'Program' show engines and engine parts (see attached). Clearly - and fairly obviously - the engines were rebuilt and warrantied. It's not like overhauling an L24 was rocket science or anything. No rare earth elements involved. Putting forward the idea that that they were just given a spruce up and a coat of paint is fairly, er, out there...

Registration: 9am–11am Hosted and Sponsored by: Bridgewater Nissan, Cars in no time 1400 US-22, Bridgewater, NJ 08807 Google Map to Bridgewater Nissan Save time at the show and pre-register your car (at no obligation or upfront cost) at: NJ Z Show Registration Portal Everyone is invited – you don't need to be a Member! Get there early, we expect a big turn-out. First 75 Z cars will receive a free Z Car Show tee shirt, dash plaque, plus a goody bag with car stuff. Over 60 trophies to be awarded! 1st, 2nd & 3rd place trophies in Stock and Street Mod, plus Nissan Mod, Roadster, GT-R & Other Nissan/Datsun trophies. Lots of great raffle items, and a 50/50! Bridgewater Nissan is also offering 20% discount on parts purchases for the day of the show. Food Truck for refreshments and lunch. A family friendly event: no alcohol, please be respectful & polite to our generous hosts. Help promote the Show by hanging a NJ Z Car Show Flyer. ‣ Base Registration is $15 (payable at the show). ‣ For an additional $15, you can Support the Club & get a NJ Z Car Club sweatshirt ($30 total). Organized by the NJ Z Car Club at NJZClub.com Looking forward to a great day shared with Z enthusiasts. Your participation is what makes this show so rewarding!

For sale is a completely refurbished 1-knob calendar clock. This clock is very nice and keeps good time. Price is $550 and includes taxes and shipping. Please contact me, ron@zclocks.com, if you have questions.

From what I understand the fist batch of rebuilt engines were rejected and returned to be rebuilt. Metal bits from machining were found in the engines. Everything was done to time and budget constraints, quality may have suffered because of this.

I think that the fundamental question is about how much and what kind of work was put in to the engines. Were they completely rebuilt, or were they just evaluated for function like a rebuilt alternator? Is there documentation out there about any engine work? If the valve seats weren't replaced then the new owner is in the same boat as if it was an original 240Z. It would be interesting to see the "work orders" for a Nissan Vintage Restoration Program car. I've only seen anecdotes and old publications about the program, but not the official communications from Nissan.

Wow! Could have just got you to print the mirrors rather than rescuing old beaten up one 🤣

Doing another 3d print run for @pjczc8 this weekend. Dug up my old files from 6 years ago. Have a SLS metal printer now, should be able to come up with some interesting pieces!

Screaming dimes!

Good morning deanhuff, Can't answer your question as I just don't know. However, if you're like the owners of the vast majority of old cars and only put a few hundred miles on your Z per year it isn't really an issue. Of course if your comfort level requires a lead additive by all means feel free. If you've recently acquired a Z I strongly suggest 1 - cold and hot valve adjustment 2 - cold and hot cylinder leakage test 3 - new valve cover gasket (the absolute best is Nissan which is still available from your local dealer under P/N 13270-Y7010) Cheers

will do. thanks

No, but it's always better than nothing.. another solution is to have someone print it in a 3d printer. (If that edge is so important to have.)

He was very tired today and none of them like pictures. ;)

Cody doesn’t look pleased Dad!!

Hope everything is dry now and your leak is all fixed up!

That sounds like a great way to spend the weekend! For a bonus the weather was nice too.

We talked Cody into working on his car today instead of Lily. So we went over to the other garage and put as much together as we could. Pinned the parking brake cable back from the exhaust replaced the clutch master line and the clutch master The we hung all the exhaust, made up fuel lines to the carbs, primed the fuel pump, Rigged up an ignition system and some temporary power. I need to get the engine bay harness sorted but I can't get it done yet. We got fuel to the carbs but have no spark. Coil ohm's out good. We replaced the matchbox on the dizzy but still have no spark, so I ordered another cheap one off Ebay. It will be here later this week...