Nissan Repair Questions? Ask a Mechanic for Answers ASAP
OK, help me visualize the answer. There is a pipe that goes from the right of the EGR valve (as I look at it from driver side of engine), that is the exhaust, right? How can I access the other end of this pipe (from below, etc), as I can't seem to see where the pipe goes? Or is it unlikely to be blocked?
Where do the EGR lines connect to the intake manifold, I don't readily see that? Where the EGR valve is bolted to, is there a exhaust/intake connection there? I have tried to clean that area but there doesn't seem to be anything but an engine block.
there is a intake to egr valve connection that is what you wanna clean , you will have to remove the upper intake to get access to the pipe
Hopefully you can see this graphic. Is the connection that I want to clean the EGR tube (item 14120)? Is the upper intake manifold that I have to remove the large cast manifold seen on the left of the drawing?
When operating properly, does the exhaust flow go through the EGR tube, through the valve and then through the EGR guide tube which is where it enters the air intake?
I was able to the move the manifold enough to get the egr tube off. I cleaned it really well, can't say I saw a lot of pluggage so I have a feeling that wasn't the problem. I could only poke a finger through the exhaust where the tube connects, I didn't feel any pluggage there as well.
I did however squeeze a finger between the manifold and the egr guide tube connection. I expected an opening but I really didn't feel one. If there is supposed to be one it seems really plugged. Since I couldn't get the manifold off completely I couldn't get a good look. Several hoses kept me from getting it off, they were a pain.
Put it all back together and ran the car a bit but scan on the EGR system was still incomplete. What would be my likely next problem?
i did say that you will need to clean the connection between the tube and the manifold that is where they clog up , right where that tube bolt on to the manifold . you need to be able to see in the back of the manifold.
By my drawing, there is an egr tube and an egr guide tube. The egr tube connects to the exhaust, that is what I cleaned. The egr guide tube connects to the upper manifold, two bolts and it looks like one bolt to the egr valve spacer. Can I not just remove the three bolts and try to unplug it that way? They seem relatively accessible given what I did yesterday, I really don't want to remove the manifold again if I don't have too, plus I couldn't disconnect some of the tubing, any tricks to the trade there?
the egr tube that connect to the upper intake is where the clog is, the tube have two bolt to the intake ,and two at the bottom of the tube where it connects to the egr valve , it is very hard to get to the two bolts on the bottom that is the reason for removing the intake ,