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Author Topic: Length of J-bolt for spare in trunk  (Read 795 times)
ZLP955
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« on: June 13, 2014, 09:23:23 PM »

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.
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Tim - New South Wales, Australia
04A VN '69 z/28 69-69 715 ex-E/MP
cam69aro
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« Reply #1 on: June 13, 2014, 09:59:27 PM »

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.
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Eldon W
1969 Black Z28
X77 03E 38,000 miles
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« Reply #2 on: June 13, 2014, 11:00:34 PM »

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
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Eldon W
1969 Black Z28
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69Z28
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« Reply #3 on: June 13, 2014, 11:43:50 PM »

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.
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GaryC

'UNRESTORED' 1969 Cortez Silver X33D80 Z28
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« Reply #4 on: June 14, 2014, 12:12:17 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 ?
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Eldon W
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« Reply #5 on: June 14, 2014, 01:16:53 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.
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GaryC

'UNRESTORED' 1969 Cortez Silver X33D80 Z28
ZLP955
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« Reply #6 on: June 14, 2014, 01:30:49 AM »

Great, thanks for the pictures. Much appreciated.
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Tim - New South Wales, Australia
04A VN '69 z/28 69-69 715 ex-E/MP
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« Reply #7 on: June 14, 2014, 01:38:52 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.
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cam69aro
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« Reply #8 on: June 14, 2014, 01:59:26 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 ?
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Eldon W
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« Reply #9 on: June 14, 2014, 02:18:45 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.
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Eldon W
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ZLP955
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« Reply #10 on: June 14, 2014, 05:07:48 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?
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Tim - New South Wales, Australia
04A VN '69 z/28 69-69 715 ex-E/MP
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« Reply #11 on: June 14, 2014, 09:28:47 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.

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.
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ZLP955
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« Reply #12 on: June 16, 2014, 01:39:59 AM »

Mike, pics would be much appreciated when you have an opportunity.
Thanks, Tim
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Tim - New South Wales, Australia
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« Reply #13 on: June 16, 2014, 01:24:25 PM »

Sorry, It was in the trunk of my car which was up on a drive on hoist in storage.
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rszmjt
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« Reply #14 on: June 16, 2014, 01:35:06 PM »

Wing nut
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