Androomantoo
Member
Well after spending most of the day replacing the rear crossover pipe, the y-pipe, thermostat housing, water pump, oil cooler pipe, and intake manifold everything is perfect.
It was the variable intake runner butterflies in the original intake. The used intake from a 2013 RRS cured the knock/rattle completely.
I can only surmise one of the butterflies broke free from the shaft and would rattle when they were closed and quiet down when open.
Cutting the intake open for a deep inspection will come later when I get some more free time. That intake is essentially trash now due to the variable runner system being bonded to the rear of the intake. I might as well cut it open and rummage around.
Woooooohoooooo!!!!!!!
Now to start saving for the timing chain overhaul this fall…
It was the variable intake runner butterflies in the original intake. The used intake from a 2013 RRS cured the knock/rattle completely.
I can only surmise one of the butterflies broke free from the shaft and would rattle when they were closed and quiet down when open.
Cutting the intake open for a deep inspection will come later when I get some more free time. That intake is essentially trash now due to the variable runner system being bonded to the rear of the intake. I might as well cut it open and rummage around.
Woooooohoooooo!!!!!!!
Now to start saving for the timing chain overhaul this fall…
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