Does anyone else have a problem with the probe backing out ? doesn't come completely out of the connection, but EGTs go WAY down. Obviously a problem if I'm counting on the Attitude to backoff the boost when I hit 1250 EGTs. I applied anti-sieze ( sp. ) on the part I screwed into the manifold, this last time I applied it to both pieces that hold the probe in. Do I need to apply some lock-tite ??


Thanks in advance...

is the probe coming out of the part that screws into the manifold or is the part that screws into the manifold backing itself out? You may have tapped the manifold too deep and not getting enoguh interfernece fit on the pipe threadshttp://www.dieselplace.com/forum/smileys/smiley13.gif In witch case you are borderline SOL with no easy fix other than the wires helping to keep it from backing itself 100% of the way out. Is the nut part contacting the manifold? Hope not


Duno if there is a high temp thread sealer out there tat will work?


Depends on that the problem is though.Edited by: ratlover

The probe supplied with the Attitude sucks. It has a fixed depth. The
key to installing it in the manifold is to tap the NPT thread real
shallow so your probe doesn't touch the other side of the manifold when
inserted. As to it sliding out... with the flange it has I just don't
see how that's possible. It's mechanically captured.



If you could get us a close up picture that would help alot.

hoot the older probes allowed adjustment. The new ones with the bend don't.

I was thinking of adding that question to the comment. So the older one
should simply be held in place by tightening the nut more. Not the nut
on the actual fitting that screws into the manifold but the outer one
that grabs the probe.

The fitting has a compression ferrel that slides onto the probe between the "B" nut and the fitting that screws into the manifold. In order to keep the probe from backing out hold the fitting and tighen the "B" nut more. In order to get an accurate reading the probe tip must be placed midway in the manifold. To far in and reading is high. To far out and it will be low. A depth gauge will help in placing the tip in the proper position.


http://www.dieselplace.com/forum/smileys/smiley2.gifDenny

Thanks for the responses, I didn't know about not threading the tap to deep... The nut is touching the manifold ( part that screws into the mainfold. ). The probe doesn't come completely out of the fitting... Just backs out to where less than a inch of the probe remains in the fitting.


I'm not sure about the depth question, seems like when I tapped it I was sure the probe didn't touch the other side when it was as deep as it could go... Guess if it backs out again I can stick a piece of coat hanger in there and see how deep it goes...


I did crank it down alot ( the outside nut that holds the probe ) this last time. I didn't the first time cause I didn't want to strip anything.


Thanks again for the replies, I will keep an eye on it and repost if it backs out...

I wonder if teflon tape wrapped on the probe holder would survive for those that tap the manifold too heartily ??