Turbo noise diagnosis?
I used to be able to hear my turbo whistle ever since I bought the car.
Seems now the whistle has been replaced by a noise similiar to when one uses the "canned air" for cleaning computer keyboards.
The car runs and drives fine. I did a valve adjustment 2 weeks ago.
This noise only happens as the turbo spools up, and abates when you reach cruising speed. At 70 mph, I can hear it just a bit, it dissappears when I let off the accelerator, but increases when I accelerate, even at 70. I tried listenening with the window down, but nothing abnormal. I can only really hear it with the windows closed. It appear to be coming from the passenger side as I would expect.
Any ideas on what to check? I wonder if the intake gasket is leaking...
Thanks!
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RRGrassi
70's Southern Pacific #5608 Fairmont A-4 MOW car
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