Guys, I need help badly…I’m in <st1><st1:state w:st="on">New Mexico</st1:state></st1> at this moment.

I ‘m driving from NJ to CA more details here….

I just pulled up at a motel in <st1><st1:city w:st="on">Albuquerque</st1:city>, <st1:state w:st="on">NM</st1:state></st1> and while I was signing the paper work I thought I heard a weird knocking noise for every cycle of engine rev, idling.
I had to backup, so, I open the window and stick my head out and I was right… the truck is making a knocking sound when idling. If I rev the Engine the noise seems to disappear or at least I can’t hear it any more. The noise is coming from the left bottom of the engine block. I have used cruise control throughout the 2000 miles trip.

The engine starts and sounds normal and crisp expect for this knocking at idle. Reving the engine seems to make this noise go away. Not sure what to do…

All fuilds have been religiously changed in time, I have 54K miles on it, 2000 dually.

 

Is it smoking at all ? How many miles since you fueled up. Did you check your oil, coolant ?

 

5 inch exhaust are new too...any thoughts?

it sounds like the rocker panel hitting a hard metal object....

 

That Exhaust could be hitting somewhere around the firewall it's really tight in there or down at the tranny cross member I have a 4" and its tight . Maybe a clamp came lose and a pipe moved.

 

No smoke...oil is fine too, coolant is new too(4000 miles on it). It smokes white in the morning untill warm up and then does fine like it used to...

 

To be precise, is sounds like mixing liquids in a glass container.

 

How long have you had your exhaust on ?

 

this is the first time out for the new exhaust, was installed few weeks ago but only ridden since I started to CA.

 

I would get under there and check that first. When I installed mine I was carefull and it still came loose on me and was banging on the cross member.

 

I look into it first thing in the morning..

 

All righty then I am getting up and moving early in the AM last min. x-mas shopping but I will check and see what you found good luck.

 

Vijay, I say exhaust too. As long as the truck is running and driving fine, I wouldn't worry. But worst case senario, one of our OBS guys lives in Rio Rancho just north of Alb. I'm sure he could lend a hand.

 

FYI his screen name is powrstrkr.

 

#8 injector cackle maybe??

 

I am with Dave and the DUCK, check that downpipe.

Great offer for the Help Duck, rep points given.