80C does not sound to high to me for an oil temperature in a
transmission at high speeds and loads. I guess you would need a magnet
that can survive 120C+.
Kees Oudesluijs
NL
John Sims schreef:
> The magnet in question is used at the drain plug in the Tranny. NOT the
> engine oil drain plug which, since there is a filter, does not need a magnet
> to separate the metal particles as does the tranny which has no filter.
>
> I purchased this magnet because there was an email on this thread notifying
> the list of the existence of this magnet which it was assumed can be used in
> the TRANNY DRAIN PLUG as a replacement for the existing ones. To quote the
> flyer that came with the magnet in part:
>
> "Neodymium magnets are brittle and prone to chipping and cracking. They do
> not take kindly to machining. Neodymium magnets will lose their magnetic
> properties if heated above 175 degrees F (80 degrees C)."
>
> My question probably should have been, does the oil in the TRANSMISSION
> AND/OR OVERDRIVE ever get up to that temperature. NOT THE ENGINE OIL!
>
> John Sims, BN6
> Aberdeen, NJ
>
> http://www.healey6.com
>
> -----Original Message-----
> From: Richard Ewald [mailto:richard.ewald@gmail.com]
> Sent: Thursday, October 22, 2009 7:08 PM
> To: Awgertoo@aol.com
> Cc: ahbn6@verizon.net; healeybruce@roadrunner.com; rnbmail@yahoo.com;
> healeys@autox.team.net
> Subject: Re: [Healeys] Magnetic drain plugs & 1 1/2 inch meters?
>
> FYI engine oil can and does see 240F. Oil temp will vary with the
> engine design, how the engine is being operated, ambient temp, and if
> there is an oil cooler installed.
> Rick
>
> Sent from my iPhone
>
> On Oct 22, 2009, at 15:31, Awgertoo@aol.com wrote:
>
>
>> John--
>>
>> I find this statement on the site:
>>
>> N -0.12 176:F (80:C) 590:F (310:C) 7.7 NM -0.12 212:F (100:C)
>> 644:F
>> (340:C) 7.7 NH -0.11 248:F (120:C) 644:F (340:C) 7.7
>>
>> I am not sure that this is saying the magnet "loses its magnetic
>> properties" at those temps but neither engine, transmission or
>> differential
>> oils
>> should ever get to 248 degrees so assumedly using an "NH" magnet
>> would be a
>> safe bet.
>>
>> But going back to the site I cannot find out what are the specs
>> (size) for
>> an NH magnet. The site contains a lot of info but I can't figure
>> out this
>> piece of info--do you have any idea?
>>
>> Best--Michael Oritt
>> ------------------------------------------------------------------
>>
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