Zacch,

Very interesting! What is the engine number on your L24 and does it match the engine number that is stamped on the dataplate, along with the serial number of the car? Do you have an E31 head as well?

The numbers don't match up. Yes i do have an E-31 head.

Zacch,

What is the number that is stamped into the block? Also, what is the number on the dataplate?

Well, it's been over a year since I started this thread (my first one on Classic Zcar Club!) and I still have this mysterious orphan E-31 engine block with a E-31 head, the old "Nissan 2400 OHC" valve cover, the older SU carbs and all kinds of black braided hoses, which would all point to a 1970 engine, but it has the higher 060039 serial number. As Carl Beck had indicated on this thread, that would reflect an approximate manufacture date of 10/71 or an early 1972 model. But 1972's didn't have E-31 blocks (Series I only), E-31 heads (Series I & II) or the old valve cover (early Series I only). I think that Carl's hunch that the block was misstamped in the factory is probably the most likely scenario. But, no one was really able to come up with a definitve way to translate the engine casting codes. This engine's casting code is "9X04D"....(9=1969, X=?, 04=day, D=December)???

Hello all,

I guess I'll put my two cents worth in, and echo deadflo's data. I am the original owner of hls30-20419 with a build date of 1/71. The engine # is L24 - 027116, the block is cast P30 with the code adjacent to the P30 of 1616L. I hope someone eventually breaks this code; I am intrigued with what Kats, Carl, and all have to say in deciphering it.

Great thread.

Dan

IZCC# 12324

Well we can deduce from info from AZ-240z that the engines are not put into the cars in consecutive order. To recap, my car is serial number 20390, with engine number 027310.

Dans car is serial number 20419 with engine number 027116.

OR perhaps the cars don't go through the assembly line in the order of their own serial number.

ya got me interested!

my 5/71 titled 1971 240 HLS30-31306 has:

Engine block P30 1408a (drivers side)

Engine casting 039190 (matches data plate L24 on strut tower)

Head E31, intake E46, 3 screw SU's.

i think the 1408a would definitely indicate 1971, April 8th

the 'a' is anyone's guess.

just add it to the database.

Hi guys, my 71 Z is HLS30-19867. Engine # is 026313 (matches strut tower plate). Engine block is P30 1109A. Head E31.....Intake E46.

Interesting.......my '71 also has a P30 block, engine #032875, car vin #25734 manufacture date of 3/71, which matches the strut tower plate. I will have to take a look at my 72's block later since it's in storage right now, but it does have a matching engine number........You all know the story with the extra E31 block engine that I have...

Dan,

A friend of mine has a car that is so very close to yours. 240ztt's 240Z has the serial number HLS30-20425 (six units apart from yours!) and it is also a '71 240Z in its original color #901.

As for my 08/70 the engine block number is L24-011821 with a valve cover that reads: Nissan 2400 OHC and the chassis number is HLS30-08323. I can't recall the thread but, the seat belts are 07/70 for both passenger side and driver's side and both lap belt and shoulder belt. One of these days I will have to crawl under the dash and get the pedal set numbers as well. BTW, mine is a paint code #901 yet the emissions decal states that it meets 1971 specs.

Dan,

A friend of mine has a car that is so very close to yours. 240ztt's 240Z has the serial number HLS30-20425 (six units apart from yours!) and it is also a '71 240Z in its original color #901.

As for my 08/70 the engine block number is L24-011821 with a valve cover that reads: Nissan 2400 OHC and the chassis number is HLS30-08323. I can't recall the thread but, the seat belts are 07/70 for both passenger side and driver's side and both lap belt and shoulder belt. One of these days I will have to crawl under the dash and get the pedal set numbers as well. BTW, mine is a paint code #901 yet the emissions decal states that it meets 1971 specs.

Hi Daddz:

Dan Veldkamp, IZCC #5004.. has HLS30 08325.. with engine #L24-011813

FWIW,

Carl B.

Carl,

That is extremely interesting that we are only two VIN#'s apart yet his engine block is eight units ahead of mine! Would you happen to know which color code his car was when it left the factory? In addition are there any pictures of his 240Z?