"Bark" at startup cracks stock airbox?

[jlccc]

"Bark" at startup cracks stock airbox

About a week ago I started up my truck and was greeted immediately with a big "whump". Recent threads here on TDR led me to believe it might have been the air conditioning compressor.



Today (while installing a Fleetguard BHAF) I noticed that two adjacent corners of my stock airbox were cracked/broken from overpressurization. Since the turbo wasn't even spooled up yet (I was parked in my driveway for gosh sakes) it couldn't have been turbo bark. But it sounded just like it.



The only thing think I can think of is a sticking intake valve allowed pressure from an engine cylinder to be forced back through the turbo and the airbox.



Thoughts anyone?

 

[Lsfarm]

I can't imagine it

Hi jpark, I can't imagine enough pressure coming backwards from the intake manifold, the intake elbow, the intercooler, the turbo compressor housing, and that 4" rubber intake hose to blow out the corners of that airfilter plastic box.



While I haven't a clue what the noise was on starting, if it was in the airfilter box, I would think that the filter would be damaged too.



Is there a possibility that someone messed with your truck? Or that the filter box has been damaged some other way? The bottom half of the box has a pretty big hole for the air intake, there would have to be a heck of a lot of pressure to blow the corners out and still expell pressure thru the filter and the intake hole.



Just my thought on the subject



Greg L

 

[Ram4Sam]

my thoughts

cheap plastic box made by Chrysler=breaks real easy



Sam

 

[Big_Daddy_T]

I still have the stock air box and its all sorts of broken. I even got the obligatory duct tape patches on it. Looks like a scene from Frankenstein.

 

[yogibear]

I doubt very serriously that DC makes the plastic air box. I have 186K mi. on my 00 now, and have changed air filters many many times while towing heavy loads, in the mountains and on flat runs and my air box looks like new. I've run the BHAF,(Wix,Fleetguard & Napa) & Mega Cannon, I haven't tried the Scotty because of the noise. The stock box w/Amsoil filter works the best for me. I have had 45+# boost and have never had the filter minder move on me. I thought the FM wasn't working, so had it checked, and its ok. My turbo has barked at me several times but no problems. I don't have any idea what could have broken your air box.

Larry