Manifold Problems....

[JessyPayne]

I recently just done a EGT Gauge and I tapped it, and after I got it done it the truck now runs and sounds like **** I think the Hole I tapped is to big and Ive been told Im gonna crack a piston like this.... any Suggestions or help appriciated guys. :nail:

 

[phale]

What size drill bit and tap did you use? Most probes are 1/8" NPT, if you tapped it too large you can drill and tap to 1/4" NPT and use a reducer.

 

[dirty_max]

yea im not sure how that would have anything to do with your pistons, but you had the manifold off when you drilled it right? or at least had the truck running?