WHISTLE TYPE NOISE ON AN 871 ENGINE

[DRISX]

One pipe everyone is overlooking, Pipe that goes from EGR cooler behind the block and into the EGR valve body . It's silicone hose and it's known to leak under heavy pulls, very hard to find this leak because its not easily accessible . I just went through this on one of my trucks . I spent all day trying to find the problem , wish I had a dyno this would have been a lot easier to spot then :)