1201? on a 2/71 car? Hmmm. Mine is 1701 on a 7/71 car. That sounds like a bit of a coincidence, doesn't it. Mike B, can you peek at the stamped numbers (if any) on your Nikki covers?

Also, that is one more apparent confirmation that Nikki was the original supplier. Although Dave's K. Denki might indicate otherwise. But so far, all the known-unmolested cars through 5/72 have had Nikkis, and the Ampcos have been on '73s and 260Zs. Mostly consistent so far.

Coincidence or date code?

Arne ...... 7/71 -Nikki 1701

rtaylor.....2/71 -Nikki 1201

edit-Dang, you're too fast Arne!

Edited February 4, 200916 yr by moonpup

Coincidence or date code?

Arne ...... 7/71 -Nikki 1701

rtaylor.....2/71 -Nikki 1201

My thoughts exactly....

I'll check on my 5/72 tonight when I get home. I did notice the number was different than yours, but don't recall what it was. Also, I noticed that none of my 1969 cars have any numbers at all.

-Mike

Coincidence or date code?

Arne ...... 7/71 -Nikki 1701

rtaylor.....2/71 -Nikki 1201

The number on my 5/72 is 2501, so the code would actually be:

Arne ...... 7/71 -Nikki 1701

rtaylor.....2/71 -Nikki 1201

Mike B......5/72 -Nikki 2501

There is also an "A2" inside the raised box on the left side. Not sure what that means. The second picture is of the fuel pump on HLS30-00210 (11/69). Notice there is no date code and the screws are different. Same yellow paint blob in the center though.

-Mike

ZDC-2 - Zinc cover

A2=Aluminum cover

For the 260Z's cars with the Zinc covers were recalled - and they were replaced with Aluminum covers. Bad reactions with US fuel additives and Zinc as I recall..

FWIW,

Carl B.

The number on my 5/72 is 2501, so the code would actually be:

Arne ...... 7/71 -Nikki 1701

rtaylor.....2/71 -Nikki 1201

Mike B......5/72 -Nikki 2501

......snip

-Mike

My attempt at coming up with a date code for these was just a WAG on my part and as fun as it has been, I seriously doubt that Nissan would have been able to put fuel pumps on these cars with date codes that perfectly matched the cars "production date", especially with so many examples of other parts that have dates where the month if not the year is different.

My attempt at coming up with a date code for these was just a WAG on my part and as fun as it has been, I seriously doubt that Nissan would have been able to put fuel pumps on these cars with date codes that perfectly matched the cars "production date", especially with so many examples of other parts that have dates where the month if not the year is different.

Just trying to point out that the year is the first digit of the date code on these, not the last. No one said that any date codes are ever a "perfect match", but parts should generally be within a certain date range of the cars production date to be correct "as it left the factory". Certainly we have seen examples of part dates that don't match up perfectly with production dates, especially on the earliest cars.

-Mike

Edited February 5, 200916 yr by Mike B
typo

Mike B .... I used your example only because it was the latest continuation of the one I posted and my statement had nothing to do with your contribution per se. I should have maybe used mine. :nervous:

Moonpup, I agree with your point. People should understand that date codes are not an exact science, but they are interesting to compare between cars. They help give us a better understanding of the production process.

-Mike

I just got another Nikki cover from Brian at ZCCJDM.com today. Don't know the build date of the donor car (I just asked today), but this one is also stamped 2501. Might not be date codes, maybe some other manufacturing code.

Edit: Brian tells me it came from a '72. Month not known, and the car is history.

Edited February 6, 200916 yr by Arne
Added more data

Can't confirm if it's original or not but my 9/72 with 95k original has an Atsugi pump and has a code of U11F.

Mark