Engine/Transmission (1998.5 - 2002) EGT probe loose

[DLBurns]

The adaptor that my EGT probe sits in on my exhaust manifold constantly works itself loose from the manifold. I can literally turn it by hand. We have cranked down on it to the point that I am afraid I will crack the manifold and it still works itself loose.

I want to put something on the threads to keep it from working loose... what, if anything, are you guys using or would recommend?

TIA

Dave

 

[rubberneck]

I do not know of a thread locker that will withstand the heat, however i have a cure that has worked for me several times. What i do is take a center punch and "stake" the adaptor in. Tighten down the adaptor. Snug is just fine, you do not need to crank it. Then simply take the center punch and put a punch mark on the manifold, about 1/8" away from the adaptor . You are not trying to kill it here, just put enough of a mark that it swages the manifold over and pinches the fitting.

 

[Boondocker]

ever loosening thermocouple

I have this exact same problem. I assumed that I had cut the threads into the manifold a little too deep. I have the thermocouple depth set correctly and the gauge works fine.



I especially notice the problem when towing, where the temperature fluctuations are more extreme - 1200 going up hill, 300 coming down, repeat.



I've had it blow off a couple of times, no damage, just a bit upsetting. So now I'm paranoid and check it all the time.



Rubberneck - when you say this swaging technique has worked for you several times, I hope you mean once each on different trucks!



I'm going to try this swaging technique. I'm leaving on a long trailer trip in a couple of days, so it'll get a good test, hope I do it right!

 

[JPope]

"... What I do is take a center punch and "stake" the adaptor in... . "



Worked for me also! I "staked" at 3 points (approx. 120*) around the bushing, and solved the issue, though i used a hardened concrete nail as it had a sharper point, and was all that I had available (punch point was flat from a previous project????)

 

[BPINE]

Hey Dave it looks like you need to stop by so I can smack your truck with a hammer !!! You know me I am never afraid to beat on someone else's truck. LOL

 

[DLBurns]

Originally posted by BPINE

Hey Dave it looks like you need to stop by so I can smack your truck with a hammer !!! You know me I am never afraid to beat on someone else's truck. LOL

LOL... . Thats a plumbers motto, when in doubt use a bigger hammer!!!

Seems to me that with the problems these things have with the exhaust manifold cracking that hitting it with a hammer and punch may not do the manifold much good and end up cracking it from the tap

How hard do you have to smack the punch to get that cast iron manifold to move a thousands of an inch or so???

Maybe I'll bite the bullet and go with the ATS setup.

What was it you said about these trucks..... It's always something!

 

[BPINE]

Can't talk now Dave I am going on Vacation see ya next week. Have the hammer ready it will be just fine.

 

[willyslover]

Blair. . have a very good vacation Buddy, you need it

 

[DLBurns]

Ditto what Gary said..... Have a great vacation and I'll see you when you get back

Dave