Chad29860 said:
I have the tube off. I took a rough measurement and it looks like 1" pipe plugs. I will let ya know more when I actually buy the plugs. I made the block off plate earlier today and am waiting on the new manifold because my old one was cracked all over the place. Not worth welding up. I am going to go ahead and replace the Oxygen sensor too while I am at it. Thanks for the info.
I don't know what it
is, but I'm fairly sure it's
not a 1" NPT thread. I can't recall a taper thread being used with a flare fitting - and the EGR tube is
definitely a flared fitting! Besides, a tapered pipe plug won't seal against a straight thread. Even if the thread pitch is correct (which is unlikely,) there won't be enough interference between threads to seal effectively.
I've got an old EGR tube floating around here somewhere that I need to take measurements on, but I know it's a flared tube, so pipe thread won't do. It may "look like it will work" - but we can just about bet it
won't - unless you get a plug in a soft material (like brass,) force it in, and it manages to seal anyhow (fifty-fifty shot, I think.)
Any fluid power house should be able to help you - check your phone book for a Parker-Hannifin dealer. I just haven't been to mine of late because I haven't needed any fittings for anything.
Failing that, the other option would be to cut the tube, leaving a short stub past the flare nut (say, 1/2"-3/4",) and braze or weld a cap onto the tube.
Do not solder - solder melts down around 700-750*F, and you'll lose the cap the first time the engine heats up! Then, install that as a plug and call it good.