Do Durango engines occasionally knock upon starting? i drove home from work so my engine was fully warmed up. I turned off the engine went inside my house to get my video camera cause i wanted to make an exhaust vid for my brother, I turn on the engine, it turns on pretty fast. I didn't make much of it cause i didnt hear anything(just regular sound of the exhaust). but from the video you can hear from the exhaust some funky rumbling in the beginning. take a look.


http://www.youtube.com/watch?v=bTBjzFVkDAM

 

I didnt hear anything out of place, nice exhaust btw

 

Haha idk I thought the beginning sounded funky. and thanks!! I wish my camera would pick up all the sound :/ there's too much bass for it to handle lol

 

I see your license plate i'm coming for ya!! 45YN606 (might be 4SYN but meh) ha nah im just kidding it sounds good.

 

haha wtf. and thanks lol

 

yea sounds normal to me too

 

What you are hearing is a vacuum being caused after the engine rpm drops and the tail presure is more than the manifold end pressure so it causes a vaccum inside creating the gorgling sound.

This is normal!

 

ok lol i was trippin. haha. Thanks for the in depth explanation!

 

4.7s do slap and knock at startup. Sucks, but is normal.

IndyDurango