Knocking After warming Up

[Ldub]

The other end of the EGR tube is welded to the exhaust system IIRC.

[Tobert]

The other end of the EGR tube is welded to the exhaust system IIRC.

Nah, it's held on by two stainless bolts. Spray 'em with a little penetrating lube and they'll come right off. Be sure to do it with the exhaust cold.

[Ldub]

Nah, it's held on by two stainless bolts. Spray 'em with a little penetrating lube and they'll come right off. Be sure to do it with the exhaust cold.

My mistake, I should have gone out & looked...

[Mrcln1]

Went out and looked at the egr not and it's cross threaded. It's going on at a pretty good angle. I guess the dealer didn't bother to fix it or couldn't. I don't have the tools I need with me right now to get at it. I'd like to take the whole tube off to make sure I get it on right and look at the damage but it looks like it's damn near impossible to get to the bolts behind the motor. I started it and it ran perfectly for 10 minutes. I revved it slowly and the knock comes in around 2000 rpms. I still can't imagine that the egr not could cause this noise. It definitely sounds like knock from the front bottom of the motor. I hope the nut fixes it. I'll keep ya posted.

Thanks Guys,

Mrcln1

[WILLY]

when i found my egr nut was the problem i was in the engine compartment with it running and i was manually reving it with the throttle mechanism right on top of the motor,it was very difficult to diagnose cause i too swore it was the engin nocking and it would only do it when reving and not at idle so when i reached under the egr i felt the suction and wrapped my hand around the tube to block it and there it was,that was the prob,and my nut was just hanging on the tube not even threaded in at all thanks to a someone not putting it back in after replacing my intake gaskets.

[Mrcln1]

I'm not sure now what the deal is cause the hose is at an angle coming off so it may just be my eyes playing tricks on me. The nut is soo tight that I can't get it loose with my shortie wrench. I don't feel any kind of leak and after it warms up and the the knocking makes a klackityklack noise when you rev the engine. I can't ven imagine how it's possible to get to the back egr connection. My buddies 2002 rodeo doesn't have all the crap on the left side of the engine bay in the way and we barely got to it. It's going on a rollback to the dealer tomorrow probably.

Thanks Guys,

Mrcln1

[Mrcln1]

Most shops wanted $300.00 plus to take the VX to the nearest Isuzu dealer. The towman will do it for $195.00. It's over an hours drive for me so thats not bad. He'll be here in a little while to pick it up. Man I hope it's repairable cause I just have a feeling that they will give me a hard time over the warranty. My mechanic worked at a Ford dealer for 4 or 5 years but I don't know if that will be enough to persuade them that he's good enough to sustain the engine warranty. I think he needs to be ASE certified but I'm not sure if he is, was, or is anymore. I'm not sure how strict Engines Direct is. It ran for 4 or 5 thousand miles just fine so it should have been installed just fine I guess. I don't know. They'll look at it Friday morning and let me know the deal.

Thanks for the help guys. I'll keep you updated.

Mrcln1