EGT sensor placement and temp - Ford Powerstroke Diesel Forum
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Old 02-29-2012, 03:47 PM
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EGT sensor placement and temp

I have an early 99 7.3. I am getting ready to install a egt probe. I know the best place is pre turbo on the manifold, but I think I am going to install it on the down pipe, because I am worried about the metal shavings going to the turbo. My main question is what would be the difference in temp reading at the down pipe vs the manifold? I know the manifold reading will be hotter but by how much?
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Old 02-29-2012, 06:59 PM
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freebump... ive been wondering the same thing
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Old 02-29-2012, 07:21 PM
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I've heard between 3-400 degrees depending on who told me.

I was worried too, but I put mine in the manifold and just used a shop vac to suck out any pieces that might be in there. 5000 miles later and zero problems. It is really too easy not to put it in the manifold.
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Old 02-29-2012, 07:33 PM
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Dont worry about those shavings, no grease, just drill. The few if any shavings will get vaporized or go by the turbine side of the turbo without incident
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Old 02-29-2012, 07:34 PM
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What was the process you used to drill it out. I would rather put it in the manifold. I used a scrap piece of pipe to drill into, just to see how many shavings went inside and It was allot more than I thought. It is a little intimidating, I just dont want to end up replacing a turbo.
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Old 02-29-2012, 07:40 PM
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Step 1, insert drill bit, step 2 drill hole, step 3 tap hole, step 4 insert pyro, step 5 go about your life. Those little shavings aren't goin into your engine, they are goin out the exhaust
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Old 02-29-2012, 07:54 PM
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Good deal thanks for all the help.
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Old 02-29-2012, 07:56 PM
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Should I have the engine running while I am drilling?
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Old 02-29-2012, 07:58 PM
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I have to agree.

Those little pieces will be long past the turbine wheel before it even really starts to spin.
even if they arent, the direction of the exhaust gas and the direction of the turbine rotation
wouldnt cause any direct impact on the fins. They should just blow right by.

I wouldnt be able to help myself though and would stick a shop-vac on that whole just for a second.
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Old 02-29-2012, 08:02 PM
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JUST DO IT! Plenty have been done just by normal drilling, tapping, and done. No problems.
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