EGR

[Markus]

The tube that goes down from the EGR valve to the exhaust system is not attached to anything on its bottom end. Is this normal?

 

[shojuan]

Are you talking about the actual EGR pipe, or that little length of flattened silver colored metal tubing that is used as a bogus sort of brace for the EGR pipe?

The EGR pipe should be connected to the exhaust manifold on the lower end. That little brace pipe that I've seen on the ATX just hangs into thin air.

 

[CALL AAA]

This is one of the few things I know about. Yes, it should be hooked up. Basically, if it's not hooked up, you are just blowing exhaust out into the engine bay. Not good for several reasons. But I will warn you, BE CAREFUL with that tube. It doesn't look like something that would cost $175, but it does. So don't break it.
Also, once you get it hooked up, let me know if it sounds any different. It seems like having an open hole in your exhaust would be loud!

Oh, yeah. There is a gasket that goes between the tube and the exhaust manifold. It's probably a good thing to have on there for the reason above.

<small>[ April 05, 2003, 02:25 AM: Message edited by: CALL AAA ]</small>

 

[shorook90]

My egr tube keeps ruining speedo cables. How could this happen if it is inside the exhaust manifold?

 

[shojuan]

shorook90:
My egr tube keeps ruining speedo cables. How could this happen if it is inside the exhaust manifold?

Make sure your speedo cable doesn't touch the EGR tube. Use some cable ties if you have to.

 

[Markus]

It is not connected at the bottom end but the ****** does mate with the manifold. I guess the two bolts holding it to the EGR valve cause the bottom end to be flush with the manifold.

The car is really not that loud, especially once it's warmed up. In especially cold weather (less than -18C or 0F) the car is louder until warmed up.

It looks like the bolts for the manifold ****** are missing and the holes on the manifold are full of rust. Any ideas for putting in new bolts?

As I recall I think the bolts were missing three years ago when I cleaned the intake (the tube was loose when I removed the EGR valve from the intake). In all this time no error codes have been thrown neither in normal service nor when running the code tests.

 

[shojuan]

Well you're going to want to get that taken care of. I don't know the bolt sizes off hand. You're going to want to run a thread chaser or a tap through those holes in the manifold to clean and restore the threads. Use a little oil or WD40 on the tap. Right now you have a vacuum leak whenever the computer operates the EGR valve. That unfiltered and unmetered air is not a good thing. Plus the open hole on the exhaust manifold is going to screw with your O2 sensor accuracy on the rear bank.

 

[Markus]

shojuan:
Well you're going to want to get that taken care of. I don't know the bolt sizes off hand. You're going to want to run a thread chaser or a tap through those holes in the manifold to clean and restore the threads. Use a little oil or WD40 on the tap. Right now you have a vacuum leak whenever the computer operates the EGR valve. That unfiltered and unmetered air is not a good thing. Plus the open hole on the exhaust manifold is going to screw with your O2 sensor accuracy on the rear bank.

Thanks Rick. I'll address this in the next few days.