Well, I'm finally getting around to relocating my EGT probe into the exhuast manifold. I'm pretty confident about doing this, but I wanna make sure I have the right tools ahead of time. I have an AutoMeter Ultra Lite series EGT guage and the probe that comes with it. Is this a 1/4 or 1/8 NPT tap? Also, looking at the website below:

http://www.vermontamerican.com/produ...646&GRP=170281

will those taps work?

Thanks,
Terry

 

Those are it.........My Autometer pyro probe took a 1/8" NPT tap.
Some mfrs. have 1/4" NPT though.

 

Cool deal. Since I have the AutoMeter I'll pull the 1/8th in tap.

Thanks,
Terry

 

I'm getting ready to do the same job. There's not much clearance in there to use a "T" handle on the tap plus I didn't want to spend the $9.00 to buy one that I'll probably never use again. My solution is to use a 3/8 inch drive 10mm 12 point socket (6 point won't work) to hold the tap and a 6" or possibly a 9" extention for the ratchet drive. This way I can do the twisting without running into things. It goes without saying that care must be taken to make sure the tap is going in straight.

 

Just remember that you don't thread a tapered pipe tap ALL the way through like you can a regular non-tapered tap. If you do, your threads will be a mile oversized. I think 3 rounds is it, but someone else may need to correct me on that.........

 

Thanks for that valuable piece of advice. I would have gone as far as I could go.

 

I would trying "sneaking" up on it. Maybe do 2 or 3 rounds, then test fit....then if needed, I might go another round or two, then test fit again.........

 

YES!!! Test fit it.

 

Got it done over the weekend! Overall, wasn't particularly difficult, just time consuming. I started with a small pilot hole and worked up to 11/32 in 1/64" increments. I greased the bits as well to catch as much of the shavings as I could. Getting the tap in was the hardest part, but once I got it going, it went fairly smooth. The worst part is that I'm 6'10" and I don't fit under the truck real well, so it was a bit awkward moving around and staying patient. I did test fit mine as it went in, and it took me 3-4 times to get in far enough, but once I got it in it fit like a champ. My readings are much better now, and I feel a little more comfortable when I get on the throttle now that I'm getting an accurate reading. Thanks for your help guys!
Terry