Just about to start some BOMBING on the 91.5 CTD, and after reading all of the threads on pyro install, I was thinking about the drilling and tapping process. Some take the manifold off, some put "lube" on the drill bit to catch the shavings, some use a shop vac to suck out the shavings, etc. My ? is what method did you guys use to install the probe? If I don't need to take it off to drill the hole, that is easier for me, but I don't want to risk my turbo/engine just to save some time. Any help is great. Thanks all. Jeff.

 

i used lots of grease on the drill bit and tap. this trapped most of the shavings, then i fished around a small magnet in the hole to get any stragglers.
Just use lots of grease.
good luck
scotte

 

Or if you don't really feel like messing with the grease, you can unbolt your turbo far enough to stick some duct tape over the opening and then drill away. Once it's drilled, take the vacumm and suck up the shavings, remove the tape and tighten up your bolts, install the probe and you're good to go!!!



~Nick

 

Duct tape trick sounds pretty good, thanks. Anyone else have any fancy tips or tricks.

 

I don't do anything special at all. Just start the engine after the drilling, tapping and probe is installed and blow the chips out the tailpipe.
The only thing that can go wrong with this method is that a chip could lodge in the turbo impeller and cause it not to turn. For this reason I leave the intake hose off of the turbo to make sure it spins. In the unlikely event that the turbo sticks just shut the engine down, spin the turbo backwards by hand to dislodge the chip then start the engine again.
My feeling is people get way too **** about chips, almost like they think they are drilling into the engine air intake part of the system.

 

That's what I did....turbo spun freely after the install, and has ever since...over 20k miles on it now.

 

When i put my probe in , i did NOT drill a pilot hole , so there would be no way for chips to even get in the manifold until the big bit was just about through , and then i used a magnet to get out what did make it in there , and 90% of what got in , was TINY. I'm with infidel , people get way too worried about this.

 

Drill the hole while the engine is running, the exhaust pressure will blow the few chips out the drilled hole that would have dropped into the manifold.....

 

Great info guys. I really was'nt too worried about the chips, but I just wanted to make sure, and to see how others have done this install. Off to buy guages...

 

Thats a good idea right there.

I just use red silicone on the drill bit. All the shaving stick to it and then when it drys you just yank it off the bit.

 

Sounds right to me. How many turbos have you heard about being damaged by the chips. I havn't heard of any and I can only imagine how some are done late at night after liberal doses of brain enhancing chemicals!!!

 

Man am I glad I'm not the only one that did the start up method. I was actually going to suggest doing that besides the duct tape idea, but I didn't want someone to jump my butt for giving bad advice!!!


I just drilled the hole and started her up, been running great ever since!!



~Nick