poping sound from engine to whole exhaust pipe, when hot

I notice recently, after 30 minutes highway drive home, turn off the engine, I hear poping noise all the way from engine to the end of exhaust pipe, the sound are common hear from engine compartment when a car just parked. anything wrong?

car is 8 years old and has 65k miles.

Thanks in advance.

所有跟帖： 

• 很奇怪，关了发动机还有声音？你肯定车底下没有个活物在4蹄乱蹬？ -宝驴车主- ♂ (0 bytes) () 04/01/2011 postreply 08:58:48

• what kind of poping sound? loud or just like clicking? -biglow- ♂ (93 bytes) () 04/01/2011 postreply 09:02:56

• 多半是停车后,底下噼噼啪啪的热胀冷缩的声音.我一天到晚听这个 -满地找牙- ♂ (0 bytes) () 04/01/2011 postreply 09:27:54

• 你又对了. -我胡说八道- ♂ (0 bytes) () 04/01/2011 postreply 11:23:12

• 胡说八道~~ -满地找牙- ♂ (13 bytes) () 04/01/2011 postreply 11:44:20

• like 满地找牙 said, 噼噼啪啪声音, thought it might run rich, extra gas bur -hyc- ♀ (757 bytes) () 04/01/2011 postreply 11:34:12

• 回复：poping sound from engine to whole exhaust pipe, when hot -qw6467- ♂ (591 bytes) () 04/01/2011 postreply 17:25:47

• 回复：回复：poping sound from engine to whole exhaust pipe, when hot -hyc- ♀ (141 bytes) () 04/01/2011 postreply 21:45:56