Knocking After warming Up

[WILLY]

Check that egr valve nut under the egr,when loose or not put back in they tend to make a noise similar to an engine knock,mine did.

[Mrcln1]

Started it again today to keep the battery from dying and it's completely silent until you rev it a little. Weird.

[Ldub]

Check that egr valve nut under the egr,when loose or not put back in they tend to make a noise similar to an engine knock,mine did.

Did you check this? It would be very easy to overlook upon installation, & it's not uncommon for the EGR nut to vibrate loose.
Many here won't leave home without a 22mm "stubby" wrench in the glove box.

[Mrcln1]

I'm gonna go out and check the egr nut in a little while. I know the dealer said it was cross threaded when they worked on the intake gaskets. I was so happy to have it running that I forgot to ask what they did about it. I'd like to take the whole tube off and check it that way. How hard is that to do? I still can't imagine how that could cause the sound I'm hearing. It definitely sounds like its coming from the bottom of the engine. I really hope thats it cause it'll cost me at least $200.00 to get it to the nearest dealer. I'll update after I check it. Almost forgot that I had a check engine light come on awhile back that ended up being knock sensor low input or output or something. Probably should have mentioned that earlier. I had asked on here what it might mean but no one seemed to know. From the sound of the name I thought it could have been the sensor going bad. Ran fine and the light would come in go with and didn't correspond with the sound. I'll update after I check the egr nut.

Thanks Guys,

Mrcln1

[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