6.5 egt probe placement
 

hi i have a 94 6.5 that i am currently replacing a head gasket on due to elongated overboost and i need to know exactly where to install my egt probe since the downpipe is just right in my face

thanks in advance

good place is in the crossover or the flat spot on the passenger side exhaust manifold

That wouldnd give me an acurate reading would it since it wouldn't be getting the full exhaust out of the turbo

i put mine in right side exhaust manifold

Here is how I did it, step by step.

1. Remove the passenger side battery (and insulate the positive end)
2. Remove the airbox.
3. Put the passenger side up on a suitable jackstand and remove the wheel.
4. Remove all of the 13mm bolts that hold the inner fender in place.
5. Remove the nuts that hold the passenger side battery tray in place.
6. Remove the small screw that holds the front lower plastic in place.
7. Carefully push the hose retainer plastic prongs through the inner fender.
8. VERY carefully (it's SHARP) rotate the inner fender forward and down while ensuring you have the front clear of the bumper. Did I mention it's sharp? Don't worry.. I'll heal.
9. Wiggle the inner fender down and around until it comes free.

Now, You have TONS of room to work with. I decided to string the hoses out of the way of the turbo inlet to drill and tap the "boss" that is now staring you right in the face.

Get face shield, drill, center punch, drill set, tap, cutting fluid and gloves together.

10. Center punch a starting mark on the exhaust boss.
11. Start the truck (set the brake) and drill the first size hole (I used 1/8")
12. Drill the hole with bigger sizes in steps using lots of cutting fluid and stepping up in size until you reach the size the tap calls out for.
13. Tap the hole (careful, things are getting warm by now out of the exhaust)
14. Shut the truck off.
15. Mount the adapter for the thermocouple.
16. Mount the thermocouple in the adapter.
17. Start the truck and check for leaks.

If no leaks, reverse 1-9 to put the thing back together. Enjoy knowing how your engine is performing.

exhaust coming out if turbo is cooler than exhaust coming out of manifolds so its hard to really know whats happening if you put it in the downpipe. do likme Crazy did and put it on the flat spot on the passenger side manifold. he has a nice set of instructions too.

there is no diff in if you put it in the down pipe i had in places same reading

The closer to the exhaust ports the better.

Ok what I ended up doing is installing it on the driver side of the passenger side manifold if that makes sence. I didn't have much leeway since I only have a 6 foot lead plus the manifold was already off too so it was easier that way

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Thanks for all the help guys:tu:

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Thanks for all the help guys:tu:

:argh: Temps are COOLER after the turbo......... why to you think a Dyno. has a probe on each cylinder. (yes I know it is also to tell the different in power each cylinder makes) Used to operate a dyno.

you are only get a reading from the driver side exhaust