Gauge install help

[89mustaine]

My egt gauge has been post turbo for a year now due to a lazy mechanic and my not knowing better. I want to move it to the manifold and just wondering what tools would be good to have on hand. I don't have a thread tap kit so I will have to buy the nessicary tools. It is an autometer lunar series gauge if that helps

[PRWSTRK_Dan]

A good drill and a shop vac to suck out any metal shards. I have also heard of putting grease on the drill bit to help grab the metal shards in the drilling and when you tap it also.

[89mustaine]

k got those covered, I also heard that the shavings might not be as big a deal as i thought. I heard that if some are left they will blow by the turbo at idle. Can anyone confirm this? Regardless I will take care to keep them out of the manifold.

What size bit and tap is generally used?

[Austinj427]

Dont use grease, drill bits are built to pull the shards out backwards towards the drill. Using the grease will gunk it up and it may not work as it is supposed to, and it will get the shards covered in grease making it difficult to vacuum out. Dont leave the truck running either, just go from a real small bit and slowly work your way up to the size you need. I held a shop vac right there as I drilled and vacuumed in between bit sizes. It took a while but i noticed no damage to my turbo. Just my .02.

[RadarRider]

Originally Posted by Austinj427

Dont use grease, drill bits are built to pull the shards out backwards towards the drill. Using the grease will gunk it up and it may not work as it is supposed to, and it will get the shards covered in grease making it difficult to vacuum out. Dont leave the truck running either, just go from a real small bit and slowly work your way up to the size you need. I held a shop vac right there as I drilled and vacuumed in between bit sizes. It took a while but i noticed no damage to my turbo. Just my .02.

+1 on Austin's info. The drill bit you need is a 7/16".