Jump to content
  • Welcome To Mopar1973Man.Com

    We can see that your guest and been lurking about. When you register on the Mopar1973Man.Com site you'll be able to interact with all the other members. This is the most friendliest Cummins forum you'll ever join. Take the time right now and  REGISTER  on the Mopar1973Man.Com this will open up many more options and functions on the website. Everyone is very friendly and helpful just ask questions and everyone will help you out the best they can. 

Sign in to follow this  
jlwelding

Tapping Exhaust Manifold

Recommended Posts

I guess I will just put the old exhaust man. on the other eng. The reason I was going to tap it was I tap the old man. in the wrong place, it's on the 123 cylinder side:doh:Cant be to far off, you think?

Share this post


Link to post
Share on other sites

Some taps are within just a few thousandths between metric and standard so if you matched them up they will be basically the same. I am not sure if 1/8" NPT would be the same as 12x1.75, guessing not because 12mm is nearly 1/2" which is considerably larger than the 0.343" drill you use for 1/8" NPT. Either way it still wouldn't work because NPT is tapered so that the threads on the probe will tighten down once it gets far enough on the taper, otherwise it would just bottom out. If you still think it will work, the drill for your metric tap is 13/32". I was wrong on the Q drill bit, there is a lot of blown around info on the net. Here's the right guide. http://www.physics.ncsu.edu/pearl/Tap_Drill_Chart.html

Share this post


Link to post
Share on other sites

I was reading a bit about drilling the manifold... saw an idea which I thought was very smart... to put a couple of strong magnets next to the drill... to suck shavings away from the hole.I tend to get carried away with tapping... I read to only tap 2-3 threads so threads would be tight without protruding into the manifold. {Something (dumb) I could see myself doing!}

Share this post


Link to post
Share on other sites

You read right, you dont want to go to far down with the tap. Where did you get Di pricol gauges at? I have been trying to finish my set out and have only been able to come up with a trans temp gauge. I need boost and egt in black face if anyone has them.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...