pyrometer install question

[4thidco]

I have attached a pic. In the pic in the middle of the manifold before it goes into the turbo, should i drill and tap there? Should i leave the engine running while drilling? This is a 93 w250. Thanks in advance.

[4thidco]

I guess i can't put a pic? Can someone please show me where they mounted their probe and drilling instructions?

[dodgebullit]

This should help. And welcome to the site. http://www.cumminsforum.com/forum/07-5- ... meter.html

[BILTIT]

This thread has a picture.

http://www.dieseltruckresource.com/dev/ ... 49424.html

[4thidco]

Thank you both for the help. Should i drill it with the engine running or use a shop vac while drilling?

[ellis93]

A greased drill bit works good.

[dodgebullit]

A greased drill bit works good.

I agree!

[4thidco]

Got it done, what a pain that was.

[simplysmn]

did you pull the Turbo or just grease the drill bit ?

[davidandrew]

Leave the engine running while drilling, there will be no problem.

[ByronRACE]

I don't know what the fear is drilling the exhaust manifold. If you use low speed on your cordless drill, a good sharp cobalt bit, cutting lube of some sort, and patience...the resulting cast iron debris is basically powdered iron. If you blow it away periodically while drilling, there won't be much left to fall into the hole. Then, once you're done...poke a magnet in there if you're worried about it. Worst case, you turn the key and that crap blows through the turbo and out of the exhaust.

I personally would not do this with the engine running for fear of something really crappy happening like having a piece of the drill bit break off and go through the turbo.

Cast iron drills easily. The people that have trouble are using too much speed, a cheap bit, and no lube...slow down, and let the tool do the work. If you see chips or grindings, it's drilling fast enough. Be patient, let it cut, and don't overheat the bit.

[opiebennett]

I don't know what the fear is drilling the exhaust manifold. If you use low speed on your cordless drill, a good sharp cobalt bit, cutting lube of some sort, and patience...the resulting cast iron debris is basically powdered iron. If you blow it away periodically while drilling, there won't be much left to fall into the hole. Then, once you're done...poke a magnet in there if you're worried about it. Worst case, you turn the key and that crap blows through the turbo and out of the exhaust.

I personally would not do this with the engine running for fear of something really crappy happening like having a piece of the drill bit break off and go through the turbo.

Cast iron drills easily. The people that have trouble are using too much speed, a cheap bit, and no lube...slow down, and let the tool do the work. If you see chips or grindings, it's drilling fast enough. Be patient, let it cut, and don't overheat the bit.

This is exactly what I did. Engine off, center punched location, pilot drill bit, then ~90% dia bit, then final size. Grease on all bits. Grease on the tap. Shop vac after each step. Anti-size on the adapter that threads into the manifold. Bought brand new bits just for this.

And cast is really easy to work.

[lz69]

Pretty easy job, just need a good drill and a nice sharp bit.

Mark location of hole on runner and avoid the center divider. For 1/4" fitting use a 7/16" bit, drill in to the manifold till the center of the bit breaks through. blow chips away from surface of hole. grease bit and finish drilling through hole. wipe grease away from surface and use pen magnet to collect stray chips.

Now tap threads with greased tap, remove every couple turns to clear grease and old chips and repeat till fitting fits nicely. Pipe thread is tapered so more you tap it the further your fitting will sit in the manifold.

Finally just hit the thread with a bit of teflon tape or dope to seal it and tighten the plug and probe into place.