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Nissan were caught out by changes to motor vehicle 'Construction & Use' regulations with regard to lighting for 1971-up in several European markets. Height from road level was particularly difficult to solve. The regulations even required changes to the illumination of the rear license plate. Of course such regulations applied to NEW cars and many private owners took the opportunity to move these aesthetically unpleasant front turn signals to a position UNDER the front bumper, or - even better - to revert to the configuration that the gods originally intended... A legacy of precedence. You may have heard of Mr James Watt? He found it necessary to use a unit of measurement in order to compare the power of steam engines to that of working horses. Of course he used the IMPERIAL system as METRIC horsepower didn't exist at that point, the Industrial Revolution not being a Continental phenomenon... You may also have heard of Sir Isaac NEWTON? That's him in your Nm measurement. (Posted from The United Kingdom of Great Britain and Northern Ireland, a small place off the coast of mainland Europe which used to rule much of the world for a while... LOL)

The integral lower turn signals are too low to meet regs at the time. So the left and right valance have impressions but no holes and the signals are moved to the bumper

Thanks guys. I will add that dedicated wire. Even though there is a path through the alternator and you don't really "NEED" that ground strap for the system to work, I was a little uncomfortable counting on pass through the alternator case as the only way for current to get back to the negative battery terminal. Hmmm... Now how to depict that on the diagram that makes it clear... ☺️

You can get a new Aisin WPN-013 water pump. I have no idea whether or not GMB was an OEM supplier, but Aisin is a Japanese based company that is a parts supplier for that country's automotive industry.

The spout is attached to a perpendicular tube underneath, see photos;

In 1991 when i was restoring a 240z and still in 1998 these were standard as the hight of the usa indicators was to low.. After 2005 or so the rules changed and the usa indicators are allowed now in the Netherlands. (and elswhere?) What i found strange is that the torque in english is not in Newton meters (Nm) but in caveman lb/ft ?? HUH?? 😂

Yes, normal for areas of Europe, possibly all of Europe

Where did you get the parts? The grease is for inserting the seal in to its groove. Brake fluid is for sliding the piston through the seal. Oh well, the cars wouldn't be any fun if there wasn't something to fix on them.

On my 7/70 #6521, it is there like your picture. But on my Jan '70, #957, the tapped hole in the firewall does not exist and that ground wire is attached to the battery hold down frame mounting screw. Hmmm, After looking at some early cars on BaT I think my car had some work done in that area and the hole got filled in? Here are a couple of images and links to BaT: #00391 And #00512 https://bringatrailer.com/listing/1970-datsun-240z-38/

1971 United Kingdom market HS30 'Datsun 240Z' with low recorded mileage. The usual inaccurate salesman's flimflam in the Bonhams write-up, but a nice car: https://carsonline.bonhams.com/en/listings/datsun/240z/62327cfd-fa98-45e5-9035-b38d20db87e2