What is this?! (Pic inside)

hbk_136

New Member
Feb 28, 2004
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Southeastern GA
I took off my regular non-pi intake to do my PI intake swap, and i noticed this beneath where my intake was, with apparently nothing hooked to it. Can anyone shed some light on this?
 

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Go here:

http://www.babcox.com/editorial/ar/eb40228.htm

and scroll down to the cylinder heads section. Should tell you what you need to know.

"1996–1999 Romeo Truck and 1998–1999 Romeo Car
The F5AE castings that had the hole for the temp sensor drilled and tapped were used on all the 1996-’99 trucks and the 1998-’99 cars. This sensor is installed in a blind hole that doesn’t go to coolant because it is designed to sense the temperature of the aluminum itself as a backup in case the coolant level is too low to register on the coolant sensor."

Read the paragraph or two before this too. Pretty informative stuff.