Along for the ride
I bought the truck in Sept of 2010 coming from a 97 7.3. The truck already had a 4" turbo back on it. Had a high pitch noise then, not knowing if that was how the 6.0 sounded, just drove it. This summer I did the oil cooler, EGR delete, STC, dummy plugs, standpipes, blue spring, 6.4 banjos, ect. I already had flushed and filled with CAT ELC. When I installed the new up pipe for the EGR I noticed the downpipe had a small hole where it was welded to the next pipe. So my question...would this cause the high pitch noise? I looked for soot thinking it could be the y pipe, don't see any anywhere. I know the connection to the turbo is aligned and tight. I do have an exhaust smell on start up in the cab through the vents, which makes me think it is the y pipe, but why NO soot. BTW, haven't used a drop of coolant, no puking, and did replace the degas cap.