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Discussion Starter #1
I've got the gauges sitting on the workbench I've just been trying to gather info and make sure I have everything I need to get them mounted.

I know where to drill the pyrometer sensor on the manifold and to leave the truck idleing while I drill to push the shavings out the exhaust. But what size drill bit and what about a tap? Also same question on the boost sensor in the intake manifold. I have DiProcol gauges.
 

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Are you dead set on having the engine run and idle while you are drilling the manifold?

I would just worry so much about what would happen if the tap or drill bit broke when doing this........
 

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Buck Ofama
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Are you dead set on having the engine run and idle while you are drilling the manifold?

I would just worry so much about what would happen if the tap or drill bit broke when doing this........
The manifold is pretty soft. I did mine while running.
 

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There is really no need to leave the truck running while you drill it. It works just as good with the truck off. Installation instructions tell you to use a size "R" drill bit. I had a hard time finding one so I did a search on the forum and came up with some great information. You can use a 21/64 drill bit. Make sure you start out with a lot smaller one and work your way up. It will keep your shavings smaller. Once you get it drilled to the 21/64, tap it with 1/8 npt tap.

Drill bits are designed to pull shavings out of the hole, thats why you can drill it with the truck off. Just go slow and don't get in a hurry. It helps to have a vacuum right there while you drill to suck up the shavings.

It's a killer to have gauges on the work bench and not on the truck! Have fun and good luck!:thumbsup
 

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I did mine while running too , no problems just wear safety glasses got a shaving in my eye.
 

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I think I am going to put mine in tomorrow as well.
 

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Washington Chapter Pres.
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I did a few without it running and the turbos haven't failed yet. I wouldn't worry bout running the engine while drilling.
 

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its not that hard to drill a hole with it running. take a punch and make a mark and your good to go!
 

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HEY JB!
Here is a link

3-Gauge Install Pictures - 5.9L Cummins

Here is some info that helped me out. Ive already installed mine. Hope this link helps you. As a valued customer, I hope you like them and if you need any other info I will be in and out ALL weekend. Feel free to send me a message, I always check them. You should have pretty much everything you need for the install .:thumbsup
 

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Discussion Starter #12
I decided to drill in the alternate location on top of the manifold. That way the shavings wouldn't fall down into the turbo, they would just sit there. I used a magnet while drilling right next to the bit and it sucked up what was on top. After I drilled I used a telescopic magnet to get the shavings out. WOW, there were alot of shavings. After I tapped the hole I used the magnet again until the inside was completely clean.

I've got the boost and pyro working but I don't have a way to hook up the tranny sensor. I think I need the adapter. I can't find the part # for it. The test port isn't deep enough and there is some sort of adapter.
 

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hydraulic lifter crew
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hate to bring up an OLD post but..

the directions that came with the gages as well as this post and dieselmanor.com show that 1/8 inch bit and tap should be used for the pyro probe.

i have the isspro gages and there's no way the threaded part of the probe is 1/8 inch. it looks like 1/4 inch to me.
do you START with 1/8 inch and work your way to 1/4 inch?

what am i missing here :CRY:



 

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Its 1/8" Pipe thread. Use a letter R drill bit to drill the hole or 21/64" if you dont have letter drills.
 

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hydraulic lifter crew
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right, home depot and autozone didnt have a letter r anything, and there wasnt a drill tap that measured 1/8".

is it 1/8" pipe thread on a 1/4" nut ?
 

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you need to drill with the 21/64 bit then use a 1/8"-27 npt tap.
 

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hydraulic lifter crew
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21/64 bit is the same size as the 1/4" threaded part on the probe is what im understanding here.. ? on the pic below the threaded part ( 1/8" npt thread ) is a little wider than 1/4".

sorry for being an idiot, but i need to get this done and have already made two trips to da sto.

appreciate the replies!

 

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Its not really 1/8". Dont pay attention to that. Go to the store and buy a 1/8x27NPT tap and a 21/64" drill bit. Drill the 21/64" bit into the manifold and then tap the hole with the tap. Pipe threads are not true to their name size. 1/8" NPT is around .437 major diameter but it also tapers from one diameter to another along its length. This is to help seal it.
 
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