Diseazd

Need a plug bolt

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Took the white 70 for some exercise. Developed an exhaust leak (loud). Found the cause....she’s missing a bolt (plug) from her early exhaust manifold. Anyone know the thread size of this item, or better jet do they have one they could spare? 

Thanks

Guy

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Is that not the narrow band O2 sensor location from a ZX manifold?  Never seen an early manifold with a need for either an EGR fitting or O2 sensor that would explain that hole. Unless it was a later user added "feature"

Anyway if its O2 bung thread, its M18x 1.5. 

https://www.google.com/search?q=280zx+exhaust+manifold&rlz=1C9BKJA_enCA668CA668&oq=280zx+exhaust+manifold&aqs=chrome..69i57j0l3.6099j1j7&hl=en-US&sourceid=chrome-mobile&ie=UTF-8#imgrc=wbMsjPBtTsxSnM:

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Edited by zKars
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Right you are Jim. It’s not an early manifold, it’s a manifold from a ZX with no exhaust tubes......W48. I tried 3/8 and 1/2 inch plugs.....one too small and one too large. I just want to plug it. I’ll order an M18x1.5 plug. Thanks so much for your help.....I am always impressed with your knowledge of Z cars.

Regards

Guy

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3 minutes ago, Diseazd said:

Right you are Jim. It’s not an early manifold, it’s a manifold from a ZX with no exhaust tubes......W48. I tried 3/8 and 1/2 inch plugs.....one too small and one too large. I just want to plug it. I’ll order an M18x1.5 plug. Thanks so much for your help.....I am always impressed with your knowledge of Z cars.

Regards

Guy

They will probably have one at your local big box parts store too.

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Glad to help.  Speed shops that sell weld in O2 bungs will also have plugs. Some of the bungs I've bought actually came with the plug.

Edited by zKars

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1 hour ago, zKars said:

Glad to help.  Speed shops that sell weld in O2 bungs will also have plugs. Some of the bungs I've bought actually came with the plug.

Great....I just ordered 2 bungs with the M18x1.5 plugs. One for each of the two Stroker Motors (I’ll have them welded in the Dow pipes). Curious as to how the A/F ratio is with the SU’s. Have you ever checked your Stroker with the SU’s? If so, what were your numbers?

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I had a great experience with my SU's with the stroker motor. Nearly equal performance in the low/mid range as the Mikuni 44's I had previously, excellent mileage, easy starting etc. AFR's with N47 needles on cruise at 15'ish, 12-13 at WOT

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2 hours ago, zKars said:

I had a great experience with my SU's with the stroker motor. Nearly equal performance in the low/mid range as the Mikuni 44's I had previously, excellent mileage, easy starting etc. AFR's with N47 needles on cruise at 15'ish, 12-13 at WOT

Perfect.....Yes I love the way the strokers pull with the SU’s and their simplicity. Just didn’t know if they were lean at WOT.

Thanks

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1 hour ago, 240260280 said:

I believe a Spark Plug is M18 x 1.5 if stuck on an island.

 

The Professor.

You think If I screwed in an NGK I could get it to fire on 7 Blue?

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6 minutes ago, siteunseen said:

My Dad told me when he was younger somehow or another they put plugs in the exhaust and made fireballs come out the pipes. My Dad bullshits me a lot though. Pretty funny  now that he's 80 and nuttier than a squirrel's turd.

........and there is absolutely nothing in the Universe nuttier than a squirrel’s turd!  Cliff, I hope you never leave this site 😂

Edited by Diseazd
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         _.-"""-,
       .'  ..::. `\
      /  .::' `'` /
     / .::' .--.=;
     | ::' /  C ..\
     | :: |   \  _.)
      \ ':|   /  \
       '-, \./ \)\)
          `-|   );/
     4cliff    '--'-'

 

     _       _                   
    | |     | |                  
  __| | __ _| |_ ___ _   _ _ __  
 / _` |/ _` | __/ __| | | | '_ \ 
| (_| | (_| | |_\__ \ |_| | | | |
 \__,_|\__,_|\__|___/\__,_|_| |_|
                                 
                                 
Edited by 240260280
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15 hours ago, 240260280 said:

         _.-"""-,
       .'  ..::. `\
      /  .::' `'` /
     / .::' .--.=;
     | ::' /  C ..\
     | :: |   \  _.)
      \ ':|   /  \
       '-, \./ \)\)
          `-|   );/
     4cliff    '--'-'

 


     _       _                   
    | |     | |                  
  __| | __ _| |_ ___ _   _ _ __  
 / _` |/ _` | __/ __| | | | '_ \ 
| (_| | (_| | |_\__ \ |_| | | | |
 \__,_|\__,_|\__|___/\__,_|_| |_|
                                 
                                 

You guessed the right inspiration for that. LOL

Image result for beavis

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17 hours ago, Diseazd said:

........and there is absolutely nothing in the Universe nuttier than a squirrel’s turd!  Cliff, I hope you never leave this site 😂

Thank you Guy, nowhere for a chipmunk's turd like me to go and be welcomed by so many good people. :love:

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You guys are terrific.....no more noise! Best part is the advice was free.....and that’s a good deal at twice the price!!!!! Thanks again Jim.

 

 

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