Author Topic: Length of J-bolt for spare in trunk  (Read 1947 times)

ZLP955

  • Hero Member
  • *****
  • Posts: 679
    • View Profile
Length of J-bolt for spare in trunk
« on: June 14, 2014, 02:23:23 AM »
Could someone with a 69 Z please confirm the finish, correct overall length, and thread length, of the original factory J-bolt hook that is used to hold down the 15" spare in the trunk?
Thanks in advance for any help.
Tim - 04A VN '69 z/28 69-69 715 ex-E/MP

cam69aro

  • Member
  • ***
  • Posts: 106
  • 38,000 mile Jerry MacNeish certified z28
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #1 on: June 14, 2014, 02:59:27 AM »
i will try to get a pic of it tonight, i don`t have a spare bolted down and it is still original finish. will post info as soon as i can for you.
Eldon W
1969 Black Z28
X77 03E 38,000 miles
unrestored

cam69aro

  • Member
  • ***
  • Posts: 106
  • 38,000 mile Jerry MacNeish certified z28
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #2 on: June 14, 2014, 04:00:34 AM »
ok, i resized a few pics Tim, also send you a pm. im not sure if the J hook was ever plated or had a finish. the bolt was for sure, shiny om back side but worn and rusted off the front side

69Z28

  • Hero Member
  • *****
  • Posts: 889
  • 69 X33D80 Z28
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #3 on: June 14, 2014, 04:43:50 AM »
Hmmmm...6 inches long. I'll have to look at mine tomorrow but mine may be a little longer...I think....but who knows after 40 years and not being original owner.
GaryC

'UNRESTORED' 1969 Cortez Silver X33D80 Z28

cam69aro

  • Member
  • ***
  • Posts: 106
  • 38,000 mile Jerry MacNeish certified z28
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #4 on: June 14, 2014, 05:12:17 AM »
check your hold down nut too Gary, see if it was plated like mine. the more i look at the pic of my J hook it looks like maybe it was phosphate plated maybe ?

69Z28

  • Hero Member
  • *****
  • Posts: 889
  • 69 X33D80 Z28
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #5 on: June 14, 2014, 06:16:53 AM »
Eldon. I think mine may be zinc plated but will have to look to make sure. I can check my survivor 69 Impala too, probably no difference with them, but who knows. Maybe Bentley or GaryW still have originals. Lloyd should have his original too.

ZLP955

  • Hero Member
  • *****
  • Posts: 679
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #6 on: June 14, 2014, 06:30:49 AM »
Great, thanks for the pictures. Much appreciated.

rszmjt

  • Member
  • ***
  • Posts: 142
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #7 on: June 14, 2014, 06:38:52 AM »
hhmmm.

My 06A Z28 J bolt is 9&3/4" long dark coloured grey or Black/ phosphate and the wingnut is silver cad. Non space saver. Owned the car since 74.

cam69aro

  • Member
  • ***
  • Posts: 106
  • 38,000 mile Jerry MacNeish certified z28
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #8 on: June 14, 2014, 06:59:26 AM »
well i bought my car from the 2nd owner in `96 (he got it in `70 for a grad present) and i never had a spare mounted in the car yet but will asap. i have a full spare set of YH wheels and will make sure the hook is long enough. i hope it is right or i will be scrounging the junkyards for one. what year Z ?

cam69aro

  • Member
  • ***
  • Posts: 106
  • 38,000 mile Jerry MacNeish certified z28
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #9 on: June 14, 2014, 07:18:45 AM »
rs, how much of the hook threads stick out when the nut is down tight ? now im wondering if mine is right or not. oh well, i will find out when i bolt a spare down.

ZLP955

  • Hero Member
  • *****
  • Posts: 679
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #10 on: June 14, 2014, 10:07:48 AM »
Interesting, the one pictured did look quite short. Assuming you use the jack base, and then the special curved wingnut, to secure the spare, wonder if that'd run out of length? I didn't mention bolt length for space saver spare because I thought that was only an option with 14" wheels, is that correct? I know the coupes and convertibles used different bolts due to the position of the spare in the trunk, maybe the 'vert has the shorter one?

rszmjt

  • Member
  • ***
  • Posts: 142
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #11 on: June 14, 2014, 02:28:47 PM »
rs, how much of the hook threads stick out when the nut is down tight ? now im wondering if mine is right or not. oh well, i will find out when i bolt a spare down.

Don't know how much thread sticks up when the spare is installed, but just the threaded section is 5&1/4".
Wing nuts are not all the same BTW.  Correct wing nut is 4&1/2" wide total and there is a small protruding section/collar where it goes through the jack base.

I will post a picture later, as well as wing nut differences.
I have owned this 69 RSZ28 since 1974, 42,000 mile survivor , Canadian Docs.

ZLP955

  • Hero Member
  • *****
  • Posts: 679
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #12 on: June 16, 2014, 06:39:59 AM »
Mike, pics would be much appreciated when you have an opportunity.
Thanks, Tim

rszmjt

  • Member
  • ***
  • Posts: 142
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #13 on: June 16, 2014, 06:24:25 PM »
Sorry, It was in the trunk of my car which was up on a drive on hoist in storage.

rszmjt

  • Member
  • ***
  • Posts: 142
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #14 on: June 16, 2014, 06:35:06 PM »
Wing nut

rszmjt

  • Member
  • ***
  • Posts: 142
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #15 on: June 16, 2014, 07:04:25 PM »
Top of Wingnut

ZLP955

  • Hero Member
  • *****
  • Posts: 679
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #16 on: June 16, 2014, 09:53:50 PM »
Great photos, thanks Mike

69Z28

  • Hero Member
  • *****
  • Posts: 889
  • 69 X33D80 Z28
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #17 on: June 17, 2014, 02:52:44 AM »
My 69 Impala survivor has a 6" j bolt with a perfect wing nut, no rust, nice and shiny and my Z has a set up just like rszmjt's. I think the difference between the 2 vehicles is the angle of the  trunk floor where the wheel and tire lays and the placement of the welded loop. There is a lot of space under the rim in the Camaro and in the Impala the rim sits pretty flat. The longer one definitely wouldn't work for the Impala. 

Mike S

  • Hero Member
  • *****
  • Posts: 1271
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #18 on: June 20, 2014, 12:15:16 AM »
 Here is mine from the 04B '67 coup for a 14" tire. Looks like Eldon's posted in reply #2.
Not sure if it was used in '69 or not but it can answer where Eldon's was used.

Mike

67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored

enio45

  • Member
  • ***
  • Posts: 98
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #19 on: June 22, 2014, 10:54:59 PM »
I have seen the short j-hook on the space saver tires...
Eddie  Montini
69Z

rszmjt

  • Member
  • ***
  • Posts: 142
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #20 on: June 25, 2014, 08:16:37 PM »
Tim, AMK has the J hook, B-11380, 9&3/4" long. $8

ZLP955

  • Hero Member
  • *****
  • Posts: 679
    • View Profile
Re: Length of J-bolt for spare in trunk
« Reply #21 on: June 25, 2014, 10:35:56 PM »
Tim, AMK has the J hook, B-11380, 9&3/4" long. $8
Thanks Mike, appreciate the tip!