Is there a rubber washer or some sort of seal under the power steering reservoir cap? Mine leaks like a sieve around the cap....is the cap vented perhaps? I am low on fluid every 200miles or so and the pump moans and the steering wheel creaks when I turn it...this is becoming a real pain in the ass. lucas brand fluid helped but now that the temp has dropped that stuff is unacceptable as it is nearly solid at 40 degrees F. I am thinking of making a seal for under the cap out of a piece of innertube...I just want to make sure that this won't cause a pressure buildup that could damage anything