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There is no need to coat your bits with grease or lube. You want all of the shavings to remain dry so that they will come out without sticking when you vacuum out the hole. Using a 1/8" NPT tap, tap the hole.
I don't see the point in having the only EGT gauge after the turbo.
You don't what your temp to be high when you shut of your truck.You have to remember when you turn off you truck you have no oil going in the turbo if to hot,you could run with problems with your turbo.That's why you owners manual say to let you truck cool down after you are pulling something or on the interstate.
I've read 300degF is where you should cool down to. Usually my gauge reads around 300-350 when I get to where I'm going. Sometimes I wait until it gets below 300 but most of the time I don't.
I've only had my probe installed a few weeks and the outside temps have been 80-100 degrees the entire time. Once the truck is nice and warm, the EGTs never get below 330 degrees (A/C off & truck in park) and it takes a little time for it to get that low. Now maybe it'll be different in the Winter. Hence, I go with the 400 degree mark. However, I also run synthetic oil so I'm not concerned about the oil in the turbo coking up below 400 degrees. If I ran regular dino oil, then I'd want it to get closer to 300 degrees before shutting down.
You don't what your temp to be high when you shut of your truck.You have to remember when you turn off you truck you have no oil going in the turbo if to hot,you could run with problems with your turbo.That's why you owners manual say to let you truck cool down after you are pulling something or on the interstate.
I said AFTER the turbo. I have mine before the turbo.
Not sure why mine is cooler than other peoples trucks, could be our thermocouples aren't exactly 100% accurate? Or a different position in the exhaust manifold? Different brands of gauges?