[200q20v] RS2 Turbo problems

Paul Friedenberg paulcsu at hotmail.com
Sun Nov 5 23:24:58 EST 2000

I purchased my RS2 turbo and manifold about a year ago for my '91 200, and 
every thing was great until I installed a TAP bypass valve. The day after 
installation, I bent some vanes on the intake side, noticed this by 
"whining" sound. I assume that this happened due to a pressure spike on the 
intake side. Turbo was rebuilt(impeller repaired and balanced not replaced) 
by TEC in Golden CO, and about three months later, I am hearing the same 
"whining" sound, just not as pronounced. Inspection of Intake side impeller 
shows no visible damage or bending. There is minimal play on shaft, but no 
signs of impeller rubbing on housing. The car smokes on startup and on 
throttle. I am replacing crankcase breather hose which is torn, may be cause 
of smoking. Plugs show signs that car is running rich, which are being 
repaced as well. FYI, car has TAP chips, wastegate spring, stock bypass 
valve. Mobil 1 changed every 2,500 miles. Any help would be much 

Paul Friedenberg

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