S4 TII grinding sound under boost
#1
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S4 TII grinding sound under boost
I was driving my S4 TII last night and hear a grinding sound when my boost hit 2psi and up. gets louder as the boost rises. I took off my TID and the shft spins freely and no shaft paly. What can it be? I rev the eng to 8k sitting still and no noise. Only during boost.. thanks.. Stock S4 Turbo installed.
#3
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Hmm... Ooh... I know. Make sure your turbo/exhaust mani. bolts are tight. They have a tendency to come loose. When they come loose it makes a CRAZY noise. Like a super-fast, vibrating, roaring, purring, knocking noise, lol.
Not sure if that's it, but it's happened to my car a couple times.
Not sure if that's it, but it's happened to my car a couple times.