LITTLE B

well finally blew stock head gasket its about time been waiting for it. I have a turbo off of a 8.3 cummins i new it wasn't going to last very long. Any way my question is where exactly is the proper place for the egt probe the guy that had the truck before me put it after the turbo. And also what size pluge do i need to plug the old hole off. And what size drill and tap do i need to drill the manifold out thanks for any help i appitiate it

White Rat

I don't know if different gages have different thread counts on there probes, but my autometer is tap size 1/8 X 27 NPT and 5/16 drill bit for the hole. I put my probe 2" from the turbo/manifold flange and 5/8 off center towards the rear. You could just get a plug from a plumbing shop for the boss in the exhaust.

Cheers

LITTLE B

so you didnt put your directly in the center of the flange?

Ggg

No do not drill exactly in the center, there is a web down the center. Drill about 5/8" off center, either to the front or rear. Don't ask how I know.

Ggg

Depending on the brand of gage you have I have seen both 1/4 NPT and 1/8 NPT threaded probes. My Autometer had 1/8 NPT and my Banks gage has 1/4 NPT probes.

Racer9

All the info you need; http://www.piersdiesel.com/TechPyroInstall.htm

b.lee

good link racer9