Results 1 to 17 of 17

Thread: Confused about original parts numbers change....

  1. #1
    Registered User
    Member ID
    CZCC-5536
    Join Date
    Dec 2003
    Location
    Las Vegas,Nevada USA
    Posts
    275

    Default Confused about original parts numbers change....

    I received from Courtesy Nissan a OEM rear hatch inner weatherstrip for the 72 Z.

    The new OEM part number from Nissan is labeled 76912-N4500 (part received from Courtesy). The original part number in the NISSAN parts book is 76912-E4100.

    Furthermore and where I am confused..... the rubber extrusion from the part received from Courtesy is not shaped as the original one on the car.

    My parts catalog is the original 70-73 NISSAN.

    Is somebody can explain me why the second section of the part number doesn't match the original number going back to original NISSAN data? There is no superseded part number in the original parts book.

    Is it possible that the new parts reproduced as OEM are now generic to fit ALL the S30 models?

    If I proceed and install this part, it will not fit. The rubber lips going over the body edges are very large and deep, they are wider than the original and they would exceed the sitting surface on the body (inside and outside) of the actual weatherstrip after installation.

    I am also bugged by the fact that the original weatherstrip has not shrunk and fits well all over the inner body.'

    My factory original parts book is from 1970-1973, updated June 1974.
    richard1

  2. #2
    Known Zitus carrier! hls30.com's Avatar
    Member ID
    CZCC-4106
    Join Date
    May 2003
    Location
    Savannah, Georgia
    Posts
    6,702

    Default

    Quote Originally Posted by richard1 View Post
    ...
    Is it possible that the new parts reproduced as OEM are now generic to fit ALL the S30 models?
    ...
    Not possible, and absolute certainty on the part in qestion!
    Will
    A Z is beautiful from any angle, I just happen to prefer to view from the drivers' seat!

  3. #3
    Semi-retired admin Arne's Avatar
    Member ID
    CZCC-8596
    Join Date
    Jun 2005
    Location
    Eugene, Oregon, USA
    Age
    64
    Posts
    8,465

    Default

    Quote Originally Posted by hls30.com View Post
    Not possible, and absolute certainty on the part in qestion!
    Will
    You meant not impossible, didn't you, Will?
    Arne - Former owner, HLS30-37705, 7/71, 905 Red
    Car blogs - 240Z - Porsche 911

  4. #4
    Known Zitus carrier! hls30.com's Avatar
    Member ID
    CZCC-4106
    Join Date
    May 2003
    Location
    Savannah, Georgia
    Posts
    6,702

    Default

    Arne, No, there is a silent "just" that my brain inserted secretly between the "Not" and "possible", that my fingers chose to play havoc with by not typing it!
    Will
    A Z is beautiful from any angle, I just happen to prefer to view from the drivers' seat!

  5. #5
    Registered User
    Member ID
    CZCC-5536
    Join Date
    Dec 2003
    Location
    Las Vegas,Nevada USA
    Posts
    275

    Default Pleae, read ALL my post again......

    Quote Originally Posted by hls30.com View Post
    Arne, No, there is a silent "just" that my brain inserted secretly between the "Not" and "possible", that my fingers chose to play havoc with by not typing it!
    Will
    .....I hope you understand what I said.
    richard1

  6. #6
    Supporting Member
    Member ID
    CZCC-12938
    Join Date
    Oct 2006
    Location
    ON
    Posts
    2,232

    Default

    Quote Originally Posted by richard1 View Post
    Is somebody can explain me why the second section of the part number doesn't match the original number going back to original NISSAN data? There is no superseded part number in the original parts book.
    If the supercession took place after your parts catalog was published it will not be seen in your catalog. I will look it up in the microfiche to see what changes were made after June of '74 up to the microfiche date of issue. I know you are getting frustrated trying to source this weatherstrip, but I don't know if it is possible to find one identical to your original today or not.

  7. #7
    Semi-retired admin Arne's Avatar
    Member ID
    CZCC-8596
    Join Date
    Jun 2005
    Location
    Eugene, Oregon, USA
    Age
    64
    Posts
    8,465

    Default Part 1

    Richard, I did read all of your post. Most of what you ask seems somewhat rhetorical to me. You are surprised that there may have been further supersessions after your copy of the parts list was printed 35 years ago. This surprises you -- how? The attached screenshot shows that the part number you are working with now WAS superseded by the time my copy was published in December 1979.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Picture 1.jpg 
Views:	71 
Size:	124.9 KB 
ID:	30983  
    Arne - Former owner, HLS30-37705, 7/71, 905 Red
    Car blogs - 240Z - Porsche 911

  8. #8
    Supporting Member
    Member ID
    CZCC-12938
    Join Date
    Oct 2006
    Location
    ON
    Posts
    2,232

    Default

    There you have it. Thanks Arne...saved me lugging that machine up from the dungeon.

  9. #9
    Semi-retired admin Arne's Avatar
    Member ID
    CZCC-8596
    Join Date
    Jun 2005
    Location
    Eugene, Oregon, USA
    Age
    64
    Posts
    8,465

    Default Part 2

    Is Nissan making some parts more generic these days in an effort to cover all S30s with fewer part numbers and inventory? Yes, count on it. Are those parts going to be exactly correct for those of us who want to keep our cars as original as possible? Nope, they won't. This is a problem that most of us have already had to deal with at some point or another.

    Take original shift knobs as an example. I have a brand new one from Nissan for my car, but it is noticeably different than my original. So much so that I have the replacement in a drawer in the house and still have the slightly flawed original on the car.

    In this case, I suspect that the original supplier to Nissan is no longer in business, and Nissan had to find a substitute manufacturer for these, who saw some pictures and specs, but never saw an original in person.

    In sum, I feel your pain, really. But complaining and grumbling to us here won't help, as we are all in the same boat. You could complain to Nissan, but catering to a few people buying low volume and low profit parts isn't going to mesh well with their goal of making profits and staying in business.



    Arne - Former owner, HLS30-37705, 7/71, 905 Red
    Car blogs - 240Z - Porsche 911

  10. #10
    Registered User bobc's Avatar
    Member ID
    CZCC-9737
    Join Date
    Oct 2005
    Location
    Orange, California
    Posts
    344

    Default

    Arne,

    Funny you bring up shift knobs. My vintage car had one of the new ones on it and it never felt right! The second I went to shift I could tell the difference between the VZ and my 1970 with an original knob. I found several other items that changed over the years on the VZ as well. I guess over the years, vendors change, spec change, materials change, etc.

    Bob

  11. #11
    Known Zitus carrier! hls30.com's Avatar
    Member ID
    CZCC-4106
    Join Date
    May 2003
    Location
    Savannah, Georgia
    Posts
    6,702

    Default

    Quote Originally Posted by richard1 View Post
    ...

    Is somebody can explain me why the second section of the part number doesn't match the original number going back to original NISSAN data? There is no superseded part number in the original parts book.
    ...
    Ok,
    The first section of the part number is to indicate fitment, the second section is actual part given that fitament.
    Your '74 parts book was right in '74, since then, there have been umpteen revisions to the parts lists it illustrates, caused by consolidation of similar parts, loss vendors, and to make matters worse, the latest part number is what makes it into the latest parts listing, meaning a superseded part only lists its closest predecessor, and not the however many there have been for the original part number. If you use Nissan Fast to look up your part numbers(the USA version or the Japanese versions anyway), it will normally list the entire supercession chain-most parts people will not share that with you by default, but it is there. Older listings will only show what was current at the time it was published.
    I have several version of the parts catalogs, and this is just the way it is...which is why I have collected several of the carts catalogs, Microfiche, and software, sometimes a partnumber has to be found by exploring several layers of Nissan part numbers.
    Will
    A Z is beautiful from any angle, I just happen to prefer to view from the drivers' seat!

  12. #12
    Registered User
    Member ID
    CZCC-3609
    Join Date
    Feb 2003
    Location
    Clearwater,Florida USA
    Age
    75
    Posts
    4,424

    Default

    Nissan as well as almost every other manufacturer - supplies "replacement parts" such that owners can keep their cars operational for extended life cycles. Manufacturers do NOT supply parts with the intention of providing exact replicas of the original part.

    Why? - because in the manufacturing process, original dies and molds simply wear out. Over time "improvements" are made that either reduce the costs of manufacturing, or increase the quality of the part. As mentioned, different vendors with different dies/molds etc can supply the parts to Nissan as well over the years.

    If the form, fit and function of a part produced later, is the same as the part produced earlier - and both come from the vehicles manufacturer - then the newer part is considered to be an OEM "replacement part". Appearance is similar, but need not be identical as far as the replacement part supply is concerned.

    If you want an exact duplicate of any part - you have to find someone that has the exact part as New Old Stock. Only the original, exact part should be labeled NOS and the original Part Number should be given. The rear hatch seal supplied by Nissan for a 280Z is NOT NOS for a 240Z - it is however an OEM replacement part for the 240Z.

    Because of massive misuse - the term New Old Stock has become almost useless today.

    FWIW,
    Carl B.

  13. #13
    Registered User
    Member ID
    CZCC-3609
    Join Date
    Feb 2003
    Location
    Clearwater,Florida USA
    Age
    75
    Posts
    4,424

    Default

    Quote Originally Posted by Arne View Post
    Take original shift knobs as an example.
    I should think that any woodworker with a small lathe could easily turn the wood in the newer knobs down to the exact same diameter as the earlier knobs... then you'd just refinish the wood.

    Yes/No???

    FWIW,
    Carl B.

  14. #14
    Semi-retired admin Arne's Avatar
    Member ID
    CZCC-8596
    Join Date
    Jun 2005
    Location
    Eugene, Oregon, USA
    Age
    64
    Posts
    8,465

    Default

    Quote Originally Posted by Carl Beck View Post
    I should think that any woodworker with a small lathe could easily turn the wood in the newer knobs down to the exact same diameter as the earlier knobs... then you'd just refinish the wood.

    Yes/No???
    Yes, I'm certain that could be done. That would be closer, but you'd still have the newer shift pattern disk with the sloppy looking back-paint and the wrong typeface. I decided to keep the original, even with its flaws.
    Arne - Former owner, HLS30-37705, 7/71, 905 Red
    Car blogs - 240Z - Porsche 911

  15. #15
    long time owner a7dz's Avatar
    Member ID
    CZCC-1188
    Join Date
    Jul 2001
    Location
    Tacoma,WA
    Age
    66
    Posts
    742

    Default

    I might have to chuck up one of these new knobs and see how close I can get it to the correct shape. I'll bet it would only take some sand paper. I still have the original knob as a pattern mine is no where close to as nice as Arne's.
    Jim
    Bought my 70Z at 21 with 24,000 miles
    Still own it. Thirty plus years later.


  16. #16
    Supporting Member
    Member ID
    CZCC-12938
    Join Date
    Oct 2006
    Location
    ON
    Posts
    2,232

    Default

    I tried to identify all the OEM hatch weatherstripping and couldn't fill in the parts number timeline which made me wonder if richard1 could or want to use one from a 260Z.

    From the '70-'73 parts catalog:

    up to 7/73
    weatherstrip tailgate outer - 76910-E4100
    weatherstrip tailgate inner - 76912-E4100

    12/79 microfiche revisions:

    from 08/76
    weatherstrip tailgate outer 76910-N3000 - 1pc
    O/side 76911-N3000 - 2 pcs
    rubber-sealing tailgate 90965-E4100

    Current OEM - 76912-N4500

    I haven't been able to find any part numbers to fill the gap from 7/73-08/76


    richard1 - I mentioned in the other thread I came across a used hatch seal that had a tag on it (260Z). I took a pic of the profile. Would this one help you? I didn't compare it to my original which is in storage and difficult to access.
    Last edited by geezer; 02-14-2011 at 09:56 PM.

  17. #17
    Nova Scotia,Canada,Earth Blue's Avatar
    Member ID
    CZCC-7641
    Join Date
    Jan 2005
    Location
    NS
    Posts
    4,085

    Default

    It appears there was a mix up in the factory: I have incorrect weather stripping for inner hatch seal labeled 76912 N4500 from Precision (via MSA order) and a replacement with the correct part and same label 76912 N4500.

    The wrong part is actually the rear glass seal (now I have two). It is interesting because when I compare it against the one labeled correctly in the kit, the "wrong inner hatch seal" has a wider slot for the metal trim.
    Last edited by Blue; 09-22-2011 at 06:28 PM.
    There is scarcely anything in the world that some man cannot make a little worse, and sell a little more cheaply.
    The person who buys on price alone is this man's lawful prey.


    John Ruskin (1819 - 1900)



    ZCars in Eastern Canada seaport ready for shipment to Europe

    http://ZSportCanada.com


Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 1970 Engine?
    By lonetreesteve in forum Engine and Drivetrain (S30)
    Replies: 102
    Last Post: 08-06-2012, 09:08 PM
  2. Terrible Vendor--Datsun Parts
    By ljbryan in forum Open S30 Z Discussions
    Replies: 34
    Last Post: 02-24-2009, 06:49 PM
  3. Change glass in original 240z side mirror?
    By kurtwwalters in forum Body and Paint (S30)
    Replies: 1
    Last Post: 10-25-2007, 06:44 PM
  4. Oil Change, Men Vs Women!!!
    By guy_geo in forum Open Discussions
    Replies: 3
    Last Post: 07-02-2007, 01:19 PM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •