I wonder if it has something to do with my cooled EGR valve, but I have exhaust headers just like the TRX so maybe it's those that make that noise till it's warmed up.I would not want to accept hearing that noise at all. Are you all saying that if start the engine warm, there is no noise like this? It is almost like there is a flapper valve or gate inside there that is making the noise till the exhaust gets hot.
is this what you mean by squeaky start?
I would double check the exhaust manifold to heads attaching bolts torque, to eliminate that possibility.
According to that starline publication that is “normal”
Feel like I got pretty lucky on mine.
Just after it idled down.Was this a cold start?