My 32 has a loud high pitch scream comming from, well I thought the turbo, orig, I thought it was the belts, factory ones were cracked and hard, changed belts to bosch items, but noise continued, it at first only happened under big loads at 4500rpm foot flat but now screams at lighter loads 3800rpm 2/3 throttle about 5psi, I can still get full boost with hardly any throttle without it, it is definately boost related. A friend however today told me that it could also a split in a plumbing joint, has any one ever heard of this happening before?