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Tapping head for temp sensor

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Old Jan 11, 2011 | 12:26 PM
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Default Tapping head for temp sensor
I know everyone uses the extra hole on the left head and I know you can buy an adapter to fit an autometer gauge but Im using a mechanical gauge which is a 1/2" fitting. There is no adapter that reduced to the 12x1.5mm on the head. Is it safe to drill the hole bigger and rethread it?

I have an extention since the mechanical sensor is about 2" long. This will keep the sensor from going in the head too far and causing any possible clearance issues.

I didnt find any answers doing a search. Any help is appreciated.
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Old Jan 11, 2011 | 12:31 PM
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A lot of people have drilled them for 3/8npt but I haven't heard of anyone going that big.
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Old Jan 11, 2011 | 12:34 PM
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I would make an adapter personally before I drilled and tapped the hole any bigger. Get two correct ended adapters and weld em together.
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Old Jan 11, 2011 | 12:50 PM
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run the electrical temp gauge and skip that mechanical would be my .02
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Old Jan 11, 2011 | 01:28 PM
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That welding thing is a good idea but I think the sensor is too big in diameter to fit inthe existing hole along with the 12x1.5 adapter fitting
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Old Jan 11, 2011 | 01:31 PM
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Originally Posted by xpndbl3
run the electrical temp gauge and skip that mechanical would be my .02
I was thinking about it but I already have $700+ in gauges and I can't return this one. I may just bite the bullet and do that though.
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Old Jan 11, 2011 | 02:14 PM
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Originally Posted by xpndbl3
run the electrical temp gauge and skip that mechanical would be my .02


To the OP, sorry for the off topic post.

xpndbl3,
That's a sweet z28 you got there in your signature pic. Nice freakin' ride.
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Old Jan 11, 2011 | 04:43 PM
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I drilled and tapped the right 243 head for an Autometer mechanical gauge where the metric plug was. It wound up being bigger than 1/2" if I remember correctly but the sensor fit all the way into the head with no problem. HTH.
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Old Jan 11, 2011 | 04:52 PM
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sell the mechanical and get an electric.... 1/2 is big...
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Old Jan 12, 2011 | 01:07 AM
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Originally Posted by ebk06
I was thinking about it but I already have $700+ in gauges and I can't return this one. I may just bite the bullet and do that though.
ebay it possibly?

Originally Posted by LS1-450
To the OP, sorry for the off topic post.

xpndbl3,
That's a sweet z28 you got there in your signature pic. Nice freakin' ride.
thanks, if you pump tens of thousands of dollars into something eventually it pops out like that.
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Old Jan 12, 2011 | 07:02 AM
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Yea I bit the bullet and got an electric one from ebay. Ended up saving $50 off the Jegs prices too. So if anyone needs a nice mechanical gauge i have one for sale lol.
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