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Sample size cannot get any smaller. I doubt that that's why they come out since the the space between the rocker arm and the valve/pad assembly would have to open up enough to allow the lash pad to pop out. No logical reason for the divot to stop that from happening. Besides the fact that many people have had that happen when they restart old factory stock engines that have been sitting for a while. Most people think it's caused by sticking valves. Maybe your guy sets his guide clearances too tight. But, he's the builder. Good luck.

@Zed Head he's mostly worried about them popping out while driving. He's had this happen to one of his customers in the past and was very much against using the flat bottomed ones. I did find the JDM-parts ones right after making this post and it'll probably be where I will get them. Thanks for all the help guys Cheers Jan

Adding an update here: I haven't found the root of the issue. I keep the car at my parent's house, so it's not always easily accessible, but I'm thinking that maybe a brake line got kinked a bit during installation. I plan to check those next. If I don't find anything there, I will switch to the old booster and see what, if anything, changes.

Sorry about that--I never removed the check valve, but have validated that it functions properly.

As requested i will put a sensible club ddiscountin place for anyone that wants one. Contact me on 00447931333474 or here.

😎

47 thumbs up for precision shims in Auzzie land. Flat and recessed bottoms.

This is the lastest version with the stainless steel stub plate and spring clip. eBay UK240z Datsun Series 1 1972 1/2 Fuse Cover / Ash Tray s/ste...Reproduction fuse cover/ash tray for the 240z Datsun Series 1. Reproduced in Acrylonitrile Styrene Acrylate. Comes with asa silver ring insert, lid pins and a stainless steel snuffer plate. Spring...

Hi Gav, I've designed, make and sell them. They are my design, based in the UK and I ship them internationally. My ebay store katodfa on eBaykatodfa on eBayFollow katodfa on eBay. Buying, Selling, Collecting on eBay has never been more exciting!

Are you making these? Or just selling them? If the latter, care to share who the original supplier is?

So it's been awhile since I last posted. Remember that aftermarket ECU? I found out it was bad and causing starting issues and the high idle condition. I happened to find an original replacement ECU from another 1976 2+2 and that solved my problem. I also found that the TPS was missing a screw and out of position on the throttle body. As it turns out, the missing screw had broken off inside the throttle body. I was able to source a used one and installed it. Everything now seemed to work except for the temperature gauge. This was baffling to me since I had replaced it with a new one when I replaced the thermostat and the housing. However, that one was a two piece unit. I tested the temp gauge and wiring by disconnecting the connection to the sensor, temporarily running a wire from the the connection to ground and turning the key to the on position. The gauge needle moved from resting position to max within a few seconds, eliminating the possibility of a defective gauge or wiring. This was reassuring, since I was not looking forward to having to troubleshoot a wiring issue, nor did I want to have to go and try to find another gauge. So, I purchased a new temperature sensor, this time a one piece unit. I had some free time to install it yesterday, and Voila! I once again have a working temperature gauge. Here's the one that didn't work: Here's the one that worked: And the proof:

@TexasZr I recently have been in contact with Sean. He was very responsive. seanz@wanadoo.fr Steve

Thank you! Oh there's rust in it, not too bad though in most places. I think that under the hatch sill is probably the worst of it.

Outstanding car! It just screams rust free and many more years of ownership. Congratulations, you can always find room for a 240 no matter where you live.

It says on BAT and other places...🤣 https://www.facebook.com/marketplace/item/4161254077491653/?ref=browse_tab&referral_code=marketplace_top_picks&referral_story_type=top_picks

I saw him posting some comments on BaT. Probably breaking a BaT rule but you could comment in one of the auctions that he comments in, with an @. Scroll down and you'll see his comments. https://bringatrailer.com/member/seandezart/

I got it running and driving back in May. Finally got it insured and new tags in June then took it down the street to fill it with gas. Today was the first day I really got it out and drove it...in all about 55 miles. She needs some tweaking to run better still though it was still really nice to be able to drive her again. This short video is in after I got back home. 20250726_125928.mp4

Does anyone have a good way of reaching @Sean Dezart at Z Story? I've emailed directly. I've PM'd on this site. Two months has past and no reply.

Oh I'm here every day, taking it all in 😄

Good song I heard in a movie with Harry Dean Stanton, "Lucky". Weird movie but he was weird guy in cool way in all his movies.

The smart ones hide, sit back and chill. That's why I'm on here everyday, trying to learn something. 😁 Bugging the $^!# out of everybody...

@jonbill Where have you been friend?

This is funny...

Also should note that it's called several different things around the internet. Valve guide, Guide - Rocker Valve, lash pad. Might help for searching. The part number works well though.

Here's some stuff. Not sure if they're showing the -Y7000 pads (Replaced By:) or the original part number. https://www.carpartsmanual.com/datsun/Z-1969-1978/engine-280z/camshaft-valve-mechanism/25 https://www.nissanpartsdeal.com/parts/nissan-valve-guide~13218-a3501.html