Hello fellow CRV owners. I have a 2001 CR-V LX 4WD with 98645 miles on it. I just got a new radiator and had the water pump and timing belt changed in early december. It cost me $1300 to get this work done. The CR-V hasn't run better. After I received the car back from the dealer, I noticed a single pop noise every once and a while. It came from under the car and I just thought something bounce up and hit it. It has been very cold (20's) and I also thought it was just the suspension and the cold. It didn't happen every day so I didn't think much about it. The other night while driving home on the highway I heard the pop again. This time I didn't have the radio on so I heard it clearly. about 20 seconds after the first pop I got a series of pops for about 20 seconds then it went away. I was traveling about 75 on a smooth highway going straight. The engine didn't seem to strain or stutter. It happened again tonight while coming down a mountain traveling about 35 mph. It popped for about 1 to 2 minutes then went away. he performance was not effected. I don't know if this matters but I did install a new Kenwood radio\Cd player in it ater I got the work done since I would be keeping it for a few more years. I installed it using a wiring harnes from crutchfield. The radio was not on when the popping happened. It sounds like it is coming from the exhaust. I hade a new pipe and muffler installed about 2 years ago. It seems to be in very good condition. Does anyone have an idea what could be causing this? Thanks for an help you can offer.