Pyro Fitting Problem

[John Berger]

I was under the hood and noticed that the fitting my EGT probe is mounted in was loose. I was going to take it off to eyeball the probe and noticed that I got about half a turn before the fitting felt like it was being tightened down. I tried a couple of times, but don't want to risk having anything break off. The fitting is brass and I have no reason to take the probe out other than to tinker. What do I do if I need to take the probe off. Any recommendations on the best way to go about it without snapping the fitting. Th engine was run this morning and has sat all day. Should I try to remove it when hot? Looking for suggestions. Thanks in advance.

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1999 Dodge Ram 3500 Quad Cab 5 spd; 4:10 LSD rear; Mag-Hytec diff. cover; US Gear EGT and Boost gauges. Amsoil foam air filter and synthetics from nose to tail.
Cummins Power, don't leave home without it

 

[B.G. Smith]

Hold the lower part of the fitting with a wrench and remove the top nut and you should be able to remove the probe. I would just tighten the fitting that screws into the manifold while you have the probe out, it doesn't have to be real tight but tight enough to keep exaust fumes from leaking. Do it cold or at least cool. bg

 

[John Berger]

I don't have a top nut. I could not find a fitting that had female threads to receive a smaller fitting. I bored out the brass fitting so the probe would fit snugly. There is an allen screw lock washer/bolt that holds the probe in place and for good measure I put some cold weld on it to hold it secure. It has never given me a problem. I always thought that if I needed to take the probe out, the brass fitting and probe would all come out as one piece. So what I really need to know is how to get that brass fitting out of the exhaust manifold if I ever have to. Should I heat it up and try to turn it out? Or should I try to turn it with a wrench. It acts like it 'slipped' off of the threads. Like I said, it is not giving me any problems, but if I need to get it off, what would be the best possible way to go about it.

Thanks.

[This message has been edited by John Berger (edited 03-20-2001). ]

 

[Alan Reagan]

It may not come out. Did you use any anti seize? Even if you did it still may "seize". That happened with my stainless probe nut. I did finally back it out carefully but it scared the stew out of me. You may have to use an easy out or be prepared to drill it and tap again in the same place. The problem with the easy out is the further in it goes, the larger it gets which may complicate things for you if it is indeed siezed up. You don't want to overstress the manifold or it may crack. The brass is so soft that you could just drill the same size hole as before down through the fitting then as you start the tap it will pull the brass out of the threads and you should be good to go. I would go back with a stainless system.

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2001 HO 6 spd 2500, 4. 10 LSD, Towing Package, Electric Brakes, SPA EGT/Boost Gauges, Fog Lights, Real Backup Lights, Molded Running Boards