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Subject: Freeze Plug

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Al    Posted 03-02-2022 at 15:27:37 [URL] [DELETE]        [Reply] [Email]  
  • Freeze Plug
  • Can anyone help me with the size or part number for 8 N freeze plugs. I have a defective one on the left side, middle of the block.

    brucehaynes@comcast.com    Posted 03-02-2022 at 21:18:29 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Freeze Plug
  • The 91a-6266 is 2-1/16" and covers the rear end of the cam shaft.Maybe a little hard to find outside of Just8ns.

    Others, 1 3/16” NAPA 219-1021

    Al    Posted 03-02-2022 at 22:43:21 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Freeze Plug
  • Thanks, Bruce

    Frank (WNY)    Posted 03-03-2022 at 08:42:24 [URL] [DELETE]        [Reply] [Email]  
  • Re: Freeze Plug - antifreeze question
  • Reading about this subject got me thinking about antifreeze types. With the dogs and cats that we have I worry about the possibility of having the plug leak and dripping antifreeze for the animals to ingest. I know there are pet safe antifreeze brands that contain either a bittering agent like denatonium benzoate into ethylene glycol to discourage ingestion, or using propylene glycol (more expensive) to make it less toxic. I have even heard of some making there own antifreeze with straight glycerin. Just wondering what your opinion is as to what would work or not work with these old engines.

    Bruce(VA)    Posted 03-03-2022 at 12:22:30 [URL] [DELETE]        [Reply] [Email]  
  • Re: Freeze Plug - antifreeze question
  • MYTH # 31: Antifreeze is antifreeze.

    FACT: The obvious reason to use antifreeze is to keep your coolant from freezing. Another less obvious reason is to prevent rust and corrosion in the cooling system. But not all antifreeze is the same and choosing the correct anti-freeze for a 70+ year old tractor is important.

    Antifreeze manufacturers have formulated their products for long life and the inhibitor attacks among other things silicone compound – the most commonly used base for gasket sealants. It also attacks lead-based products (solder and Babbit), some yellow metals (cam bearings, radiators) and conventional gaskets and packing materials. Do NOT use coolants with OAT inhibitors in your N. Read the label and use only IAT (Inorganic Additive Technology) inhibited antifreeze. OAT stands for “Organic Acid Technology” based corrosion inhibitors and they are designed to have longer service life than that of IAT coolants. Unfortunately, that feature comes with a bad side effect to old engines. One fellow decided to change antifreeze in his antique car. His regular brand was out of stock so he bought the “advanced” formula. Four weeks later he found pools of antifreeze under his car. The antifreeze had dissolved the old gaskets. It was formulated with OAT inhibitors.


    Here are some tips for finding IAT coolants:


    Prestone says that all of their current antifreezes are OAT formulas.

    Peak says that their antifreeze and coolant is an IAT formula. The container is blue. It is important that it not say “long life”. Peak Sierra brand is propylene glycol for those who prefer that. It too uses an IAT formula.

    Zerex says that Zerex Original Green is an IAT formula. It comes in a white container. Do not use their G-05 formula in the gold jug.


    Frank (WNY)    Posted 03-03-2022 at 13:36:20 [URL] [DELETE]        [Reply] [Email]  
  • Re: Freeze Plug - antifreeze question
  • Thanks Bruce, that is great information. I doubt that most people would spend the time to check to see if it was IAT or OAT. I will check my F150 owner manual.

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