EGR valve
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Junior User
Joined: Oct 2010
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EGR valve
I need some pointers on changing my EGR valve on my 98 4.0 "X" motor. I know it's simple as can be, because its like, right in front of you. But mine is EXTREMELY rusted, and jeez, it looks like everything is going to break just by trying to get it off.
Anyone got some helpful pointers I can use?
Anyone got some helpful pointers I can use?
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Junior User
Joined: Oct 2010
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I've been on quite an adventure tracking down the problem. Now that I've found it, doesn't seem like it's going to go smoothly.
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Joined: Jan 2005
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From: Titusville, FL
I recently replaced both the EGR valve and EGR vacuum solenoid on my 94 Explorer. Before starting I soaked the nut on the EGR exhaust line with liquid wrench. Did that a couple of times with about 2 hours between soakings. Someone on this forum commented the nut on their auto was frozen on and would not loosen. I used a 1 1/8 inch open end wrench and the nut broke loose with hardly no effort. Once the nut was loosened I removed it by hand. Replacing both devices required removing some brackets and care in removing and replacing the vacuum lines. Remember how you take things apart so you put them back in the proper place, especially vacuum lines.
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Junior User
Joined: Oct 2010
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I recently replaced both the EGR valve and EGR vacuum solenoid on my 94 Explorer. Before starting I soaked the nut on the EGR exhaust line with liquid wrench. Did that a couple of times with about 2 hours between soakings. Someone on this forum commented the nut on their auto was frozen on and would not loosen. I used a 1 1/8 inch open end wrench and the nut broke loose with hardly no effort. Once the nut was loosened I removed it by hand. Replacing both devices required removing some brackets and care in removing and replacing the vacuum lines. Remember how you take things apart so you put them back in the proper place, especially vacuum lines.
But, do I really have to remove the large nut on the manifold? I thought I could remove that smaller one that screws right into the EGR?
Junior User
Joined: Jan 2005
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From: Titusville, FL
I guess I don't know what large nut on the manifold you are talking about. The nut I referenced is the nut that attaches the EGR exhaust line to the bottom of the EGR. The exhaust line connects the EGR valve to the exhaust manifold on my 94 Explorer.
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Joined: Jun 2009
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From: Cedar Rapids, IA
The hardline with the orifice for the EGR has a nut on each end, one at the EGR valve and one at the exhaust manifold. This orifice tube has the ports for the DPFE as well. Removing/replacing the EGR valve should not require disconnecting the nut from the manifold.
-Rod
-Rod
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Junior User
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I dread having to do this man, it looks so damn intimidating. The bolts that hold the EGR to the gasket part don't even look like they have threads on them anymore, the look like rusted exhaust bolts ya know? Where the threads kinda just, disappear?
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Joined: Aug 2008
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From: Frederick, MD
Surging going down the road, 98 mountainner
Our 98 Mountaineer with the V6 4.0 surges going down the road.
Any ideas to help zero in on the issue?
It is like you are going down the road at 45 and then all of the sudden away we go.
Just looking for ideas before I pop the hood in this weather.
Any ideas to help zero in on the issue?
It is like you are going down the road at 45 and then all of the sudden away we go.
Just looking for ideas before I pop the hood in this weather.
