Egt

[Hawkins115]

What are your opinions on the best/safest way to drill and tap for an EGT probe into the manifold?

[Performance Oil Products]

I do all of mine between the last 2 cylinders on the pass side from under the truck. Then run my probe across the top and drop it down next to the turbo.

I have installed a few hundred of them and that seems to give the most accurate reading I have found

[Hawkins115]

Thanks, whats the safest way to drill for that? Is there a sure way to do it without taking the manifold of the truck?

[bryanbrown]

I used a regular drill. Centerpunched it first. The only thing I noticed was that the tap seemed to have a hard time staying square with the hole, and since I put it in the bend just before the driver's side uppipe, I couldn't really tell which way straight was either. I went VERY slow, and it worked out.

[Hawkins115]

You didn't have any problems with metal shavings running through the turbo? Thats the part I'm most worried about

[bryanbrown]

I got a telescoping magnet, like you'd use to find a bolt, and stuck it in the hole, and moved it all around. It got alot of stuff out. I also went slow with the bit, and when I felt it start to go through, I cleaned the bit off, and went really slow the rest of the way, stopping to clean off the bit every few seconds

[Performance Oil Products]

You have to use a telescoping magnet to get the shavings out, and drill very slow. You will be fine

[CSIPSD]

Here is the deal, your drilling UP... Things fall DOWN... Drill it, tap it and be done. Anything that does DEFY gravity and FALL UP will blow right thru the EXHAUST side of the turbo and out the tail pipe with no harm.

I have done MANY (20+) this way and no issues other then a few burns from shavings falling DOWN on to my arm, neck and eyes.

[gzartman]

Just did mine last weekend, it was easier than I thought it would be. The worst part was working up the nerve to drill into the exhaust manifold. I didn't want to have to buy a new one if I messed up. I center puched the driver side manifold just before the coupling to the up pipe to the turbo. I've got a 4" lift so I had plenty of room to lay on my back under the truck (make sure you have safety glasses on) the shavings fall back down on you. I used a 1/8" bit to start with no oil then a 3/16" bit. Then used a 21/64" bit to make the final hole, with no oil. If you go slow with no oil, the shavings will fall out as you drill and wont stick to the bit. Then just use the 1/8" NPT tap and waallaaa, all done.