Chevrolet Repair: Power Steering Noise, chevy astro, leak fluid

Question
Hi Mark!
Since it has turned cold, down in the lower 30s, I hear a funny whinning-buzzing noise when I first start my 89 Chevy Astro. It gets louder when I turn the wheel back and forth and does sound as if it is coming from the power steering unit area. It has done this for the last two winters or so. It gets better and eventually goes away after around 10 minutes or so of warm up. Doesn't occur at all when temps. are in the upper 30s or above.
If this is a power steering problem, can I correct it with additives, ajustment, etc., or do I need to have it replaced or repaired?

Thank you very much,

Mike Eidson

Answer
Hi Mike, This is air in the fluid which makes the noise. The air is coming from the return hose. When cold the hose will let air into the system at the clamp. It won't leak fluid though. Replace all the clamps on the return hose, there might only be one at the pump. There is also a cold climate fluid that is lighter weight that is sold at the dealer. You could also change the fluid and install that. The clamps might just take care of your problem so try them first.

Have a Great Day     Mark