EGR tube

[vbrad511]

Hey all, my 97 OHV 4.0 needs a new EGR valve. I've got it, but the entire piping system is rusted to the point of it's not gonna come apart. The only option i can see is replacing the tube/pipe that screws into the rear of the driver's side manifold, but I can't figure out how to get on it to turn it. I've doused it several times with Blaster hoping to loosen it up. Suggestions on getting to it?

 

[AllanD]

The fitting into the Exhaust manifold is basically a compression fitting.

So the outer hex is the "nut" and the inner hex is the fitting itself....


considering it's attached to an exhaust manifold I seriously doubt that heat will hurt it.

So I'd suggest turning a torch n it, heat it till it glows and try unscrewing it again...

You might want to determine the correct wrench size while it's cool though...

 

[vbrad511]

Thanks. It's the getting to it is what's concerned me. I'm thinking I can maybe get in through the wheel well. I'll give it a whirl this weekend and keep you posted.

 

[vbrad511]

Done deal. I did use a little heat to break the tube loose on the manifold, but it took the whole fitting, twisting the tube and all. I had a spare setup so I cut the tube about halfway through with a hacksaw blade and then turned the fitting(s) and committed to breaking the tube the rest of the way off. And had to go through the wheel well, 1/16th at a time. I got the fitting out, had to dremel the compression nut off, cleaned up the threads, added anti-seize, and reinstalled everything. Seems to be running just fine now. Thanks