Where to drill and tap?

[aggieLR]

Which place would be better to put the probe for a pyrometer? I don't have a right angle drill and I don't want to take the manifold off, so I can't put it right next to the turbo. So which of these is a better option, or if you have any other suggestions please feel free to let me know.



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[Lorenz]

Get the right drill.



harbor frieght has the angle power drill head cheap $10-12



http://www.harborfreight.com/cpi/ctaf/Category.taf?CategoryID=601&pricetype=

 

[lmills]

Most of the installs that I have seen, including mine, were just drilled from the top side right before the manifold turns down towards the turbo. Basically either A or B, just more up on the top side than down on the side.

 

[Fireman]

I drilled mine where you have the "B" not where you have the dot. You can use a regular hand drill and drill straight down into the top of the manifold. I believe Diesel Power Products has some good instructions on their web site in the gauge section.



Fireman

 

[Joseph Donnelly]

Drill a little to the right of the letter B, just to the left of #3 port entering the log. Drill on the side of the log, just above the seam. Easy to do with a regular drill and bit. Almost all chips fall outside onto the towel you put under it. Fish the rest out with a magnet on a stick.

 

[Gary - K7GLD]

HMMmmm *I* would think "A", since the rear cylinders normally run the hotest, and would justify closer attention...

 

[Joseph Donnelly]

Water temp is usually highest on #6 but egt's are different.

 

[aggieLR]

Well, I had heard that the 4,5, and 6 cylinders ran hotter, but I don't know why? Thats why I ask. I'm not set on putting exactly where the dot is, but I am more interested in where it would be best. And if there is anything I should worry about drilling into.

 

[rbattelle]

I would avoid, if possible, drilling into that curved part of the manifold. Too easy to screw up with a hand drill. Just my opinion, I prefer to do that sort of work on a drill press where you can be sure you're at 90 degees.

 

[RankRam]

Aggie take a look in my gallery.

 

[Gary - K7GLD]

Well, I don't intend to get into a debate on the subject - but a number of past threads have pretty well pointed out that torn down engines quite often display substantially MORE signs of heat related issues on the rear cylinders - and those are certainly the ones *I* would want to monitor most closely and have done so as much as possible on my own installation...



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This is on an '02, but the same principle applies...