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sdyck

Modifying a '70-71 choke knob to fit a '72

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Well, my choke knob gave up the ghost after 40+ years of being yanked on. It snapped just above the set screw.  I saw that the '72-73 know was NLA but a new '70-71 was still available, different symbole, but I figured it would still fit.

No such luck, the hole in the knob that fits over the metal tang is too small. Has anyone tride to modigy the knob to fit?  The hole seems to be deep enough but either the width or the bredth of the hole would need to be filed to enlarge the hole to fit. My worry is that it needs to be a tight fit so as not to wobble, the set screw seems to do little more than hold the knob in place.

Has anyone tried this?  Any advice?

Thanks.

Steve   

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On ‎2016‎-‎05‎-‎10 at 1:36 PM, Namerow said:

Which of these styles did you buy?

S30 Console - Choke Control Knobs - variations.jpg

I bought the one on teh left for the 70-71 from my local Nissan dealer.  the 72-73 (the one I need) is no longer available.  Unfortunatly 240rubber parts only offers teh 70-71 as well.  

 

17 hours ago, sweatybetty said:

why not file down the metal choke tang instead? much easier

I thought about that, but it that part would be more costly to replace than the $10 knob if I mess it up.  I'm going to take a shot at filing/drilling/ dremmeling out the knob and will post my results.

 

Steve

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Namerow has kindly offered to swap my '70-71 knob for a '72.  So it looks like I'll hold off on the filing.

 

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Turns out Namerow and I had the same 70-71 knob so I went the modify route.

image.jpeg

 

Used a meatball dremal grinder bit to widen the width of slot, the base widens so the knob slots needs to be filed out. I widened it slowly so the fit remained tight. Also drilled the grub screw hole to 1/8"image.jpg

im very happy with the resultbut picture shows Lots of work to do on this interior :(

image.jpeg

 

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Sweaty

If you're referring to the little pod on the left side of the console that is usually the AC controls. Dealer add on...

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I can reproduce the knob if anyone is in need of the correct one with choke on the handle.

but it wont be only 10$

Steve

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Yup the switches are for air con. Compressor works but no gas in  the system. I'm eventually going to take it out.

 

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16 hours ago, sdyck said:

I'm eventually going to take it out.

@sdyck

If you remove the ac system, I may be interested in it although shipping might be kind of steep...

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Patcon, when I get to that point I'll let you know. Expect it to be part of my winter projects.

 

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On 5/11/2016 at 4:51 PM, sdyck said:

 

I bought the one on teh left for the 70-71 from my local Nissan dealer.  the 72-73 (the one I need) is no longer available.  Unfortunatly 240rubber parts only offers teh 70-71 as well.  

 

I thought about that, but it that part would be more costly to replace than the $10 knob if I mess it up.  I'm going to take a shot at filing/drilling/ dremmeling out the knob and will post my results.

 

Steve

Steve, Believe I have what you need and you have what I need. PM me on Facebook Kirk Towner 

20170617_203845.jpg

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On Saturday, May 14, 2016 at 4:50 PM, nix240z said:

I can reproduce the knob if anyone is in need of the correct one with choke on the handle.

but it wont be only 10$

Steve

If you can do them in billet aluminum with no modifications needed I would be interested as long as the price does not exceed $50.

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On Sunday, May 15, 2016 at 11:22 AM, Patcon said:

@sdyck

If you remove the ac system, I may be interested in it although shipping might be kind of steep...

You would be better off buying a modern system if you want A/C. The old one installed by the dealer either needs to be converted to accept R134a or it is probably unserviceable. An upgraded system will come with everything you need for installation. I personally don't like the load on the engine when they are running plus the extra weight I can do without. Even though I live in Florida I can get along without it, I guess it is a part of growing up in the south. Good luck!

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I have been in the South my whole life and work out in the heat but I prefer a little bit of cold air when possible. Converting refrigerant is not an issue and the really valuable part of the system to me is the interior portion that piggy backs so well...

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8 hours ago, esmit208 said:

You would be better off buying a modern system if you want A/C. The old one installed by the dealer either needs to be converted to accept R134a or it is probably unserviceable. An upgraded system will come with everything you need for installation. I personally don't like the load on the engine when they are running plus the extra weight I can do without. Even though I live in Florida I can get along without it, I guess it is a part of growing up in the south. Good luck!

there are substitutes for r-12 that work just fine, no need to convert to 134a. its on its way out the door anyhow

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I forgot to mention at the time when this topic first appeared that it seems to my eye that there were two early choke knob designs.  The earliest is the very curvaceous, asymmetric version that Steve (nix240) reproduces so nicely.  The one that the other Steve (sdyck, aka 'Steve from Calgary) had break on his car does not look the same.  Instead, it's kind of halfway between the early-early, no-hard-corners style vs. the quite angular version that showed up in MY-72 and is now the only version that's conveniently available.  Notice too how Steve-from-Calgary's broken item has a head that looks quite symmetric.  All the other versions are visibly asymmetric.

3 choke knob designs in the course of just three years, then?  And then a 4th version added when the 260Z arrived.

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18 hours ago, 7tooZ said:

Hope this isn't repetitious but here is some info on choke knobs

Mr. Neyerlin at zparts.com has some nicely done 'parts chronology' posts in the 'Blog' section of his website.  The piece that 7tooZ has noted suggests that there may have been four choke knob designs within the 240Z model range (plus the fifth design for the 260Z).

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