[s-cars] Stromung in the rain

[DGraber460 at aol.com]

Not Stromung info, but my URQ did that when I went through standing water.  
It sounded and felt terrible. I found out others had experienced the  same 
issue. The consensus is that the exhaust pipes and joints are  quick chilled, 
contract, and introduce leak that reseals when it warms back up  to operating 
temps.
I at first rejected this idea as it was a serious vibration tied to RPM,  and 
dramatically sudden. All other possibilities have been eliminated, so I'm  
now a believer in this description.
 
Dennis
Denver