Not sure you have the right information. Others will chime in but that’s the correct head. IMO

Doesn't the 280 have a plate on the passenger wheel well with the engine size and serial number like my 240 has?

1 hour ago, nowak1981 said:

evidently Wikipedia was able to shed some light on the engine and this is what I found

As far as I can tell, none of those vehicles were in the US market.

Not clear where you got the Wikipedia info. It's incomplete.

I looked around and find that even the latest Wikipedia entires are incomplete. Kind of strange but I guess that's how "open source" encyclopedias work. No single source is dependable. Too many people can get in and mess things up.

https://en.wikipedia.org/wiki/Nissan_L_engine

The 240Z is not mentioned here -

L24

Nissan L24 engine

The L24 was a 2.4 L (2,393 cc; 146.0 cu in) engine produced from 1969 through 1984. Like the L20A, it was based on the design of the L16. It produces 130 PS (128 bhp; 96 kW) and the version with twin side draught SU Carburettors produces 150 PS (148 bhp; 110 kW). Bore and stroke is 83 mm × 73.7 mm (3.27 in × 2.90 in).

A single carburetor version of the same engine was also standard in the Laurel sedan (240L) for various export markets, in the years 1982 –1984. While the last generation Cedric to use this engine in Japan was the 230-series (1971–1975), Yue Loong of Taiwan installed it in 430-series Cedrics at least as late as 1984.^[12]

^{But the 260Z is here -}

L26

The L26 is the larger 2.6 L (2,565 cc; 156.5 cu in). Bore and stroke is 83 mm × 79 mm (3.27 in × 3.11 in). It was produced from 1973 through 1978. It produces 140–162 PS (138–160 bhp; 103–119 kW). In 1975, the L26 replaced the Prince G-20. The L26 makes around 165 bhp (167 PS; 123 kW).

Applications:

• 1972–1975 Nissan Cedric (230 Series)

• 1974–1977 Nissan Laurel (C130)

• 1974 Datsun 260Z 1974 for North America. 260Z sold in other countries until 1978

• 1976–1978 Nissan Cedric (330 Series)

here is where i got it from

https://en.wikipedia.org/wiki/Nissan_L_engine

EDIT, so same as above, didnt see it

Edited January 2Jan 2 by nowak1981

Zed edited the post from my build thread, I guess I didnt see it

On 2/5/2025 at 6:21 PM, Zed Head said:

Somebody put a 280ZX engine in that car.  Maybe they did the 5 speed too.  That would be nice.

The intake manifold and the cooling fan ducts over the valve cover are the tell.  It should run just like the original 75 L28.

Had second thoughts.  Probably not.  Looks like a 75 manifold.

https://bringatrailer.com/listing/1975-datsun-280z-43/

2 minutes ago, nowak1981 said:

here is where i got it from

https://en.wikipedia.org/wiki/Nissan_L_engine

EDIT, so same as above, didnt see it

I don't see that list you posted anywhere in that link. Maybe you clicked through to get there?

Anyway, there are really just three "L" stampings on the blocks, as far as I know. L24, L26 and L28. 2.4 liters, 2.6, and 2.8. The L24 used in the Maxima was called an L24E but I don't think that they stamped the E on the block. You just had to "know". I don't think that L24E was a Nissan designation it's just what people out here call it. Can't remember for sure though, but I do know that the E was not used on the L28's.

Further back in the thread of the engine bay pics there is a plate on the driver side. My 1/78 only has that plate as well. And of course one plate on the door jamb. I believe the 75 model also had the N42 head.

Edited January 2Jan 2 by Yarb

I think your right, I seem to remember a conversation last year about it, maybe im mistaken.

From the information you posted. It looks like a 2.8 ltr N42 block with an N47 head. The 280Z would be the most common in north america.

280Z used the N42 block from March 75 to June 78. After June 78 was the F54 block.

The N47 head was used from May 77 to June 80 (S30 and S130)

All L24, L26 and L28 engine blocks have the code cast into the side just behind the left side engine mount bracket.

I have a photo, but the site is refusing to upload🤔 site keeps kicking me out.

Edited January 2Jan 2 by EuroDat

The L28 is the correct motor for a 1975 USA 280Z car. It does appear that the serial number on your block 413582 does not match the serial number on the id plate in the 4th picture of your first post in this thread that shows a SN 014280 or maybe 6 for the last digit. Possible that the motor was replaced. The plate in your first post does identify the motor as a L28.

On 2/6/2025 at 10:42 AM, nowak1981 said:

To get a decent picture of the number I had to pull, Im guessing is the coolant temp sensors.  but lucky me, they cut the end off.

 

 

 

This is the heart of the mystery. A CHTS in an N47 head.

Edit - except that I see that Signatures don't seem to work anymore. Mine is gone and so are others. @Mike

Something that might be helpful on these long build threads - update your signature with details as you discover them. 10 pages is too many to easily go back through to figure out the basics.

It's not under Profile it's under Account Settings.

https://www.classiczcars.com/settings/signature/

Edited January 2Jan 2 by Zed Head