I wouldn't think so.
I used that kit  from tencentlife and I don't think I had to tap anything.

----- Original Message -----
From: "Rocket J Squirrel" <camping.elliott@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Friday, May 27, 2011 6:14 PM
Subject: Re: Torque spec that requires calibrated fingers

> No tapping? Not with a 1/8' 'NPT tap?
>
> On Fri, 2011-05-27 at 18:08 -0700, Scott Daniel - Turbovans wrote:
>
>> for sure can't have only one thread of engagement.
>> but don't go tapping.
>> tapered thread right ?
>> turn it in until there's some resistance.
>> don't use teflon tape on the threads...as that's an electrical
>> connection -
>> the OP switch has to make ground in the engine block.
>> you should get 4 turns maybe.
>>
>>
>> ----- Original Message -----
>> From: "Rocket J Squirrel" <camping.elliott@GMAIL.COM>
>> To: <vanagon@GERRY.VANAGON.COM>
>> Sent: Friday, May 27, 2011 5:37 PM
>> Subject: Re: Torque spec that requires calibrated fingers
>>
>>
>> > Thanks for the tip, Mike!
>> >
>> > I just received my Autometer oil temp senders and tried one in a
>> > fitting. They are 1/8'' NPT threads and "finger tight" is only about
>> > one
>> > turn. It worries me to have only one turn of thread engagement. I'm
>> > tempted to go at the threads with a tap and die.
>> >
>> > On Fri, 2011-05-27 at 19:57 -0400, Mike S wrote:
>> >
>> >> >warning light sender has this to say about torquing:
>> >>
>> >> Well, for regular bolts/screws, with experience one does develop a
>> >> "mechanic's feel," where you can feel when the bolt starts to stretch
>> >> and full "torque" is achieved. (I quote torque because it is an
>> >> indirect measure of clamping force, which is the real concern).
>> >>
>> >> Pipe fittings are a bit different, since they seal instead of clamp,
>> >> so
>> >> the feel is completely different. Most people tend to vastly
>> >> overtighten them. "Hand" tight, plus a quarter turn is probably a good
>> >> start. If it leaks, give it another quarter turn.
>>