I put the finishing touches on my elderly neighbors 97 Catera oil cooler, o-ring, intake, and valve cover gasket repair and I started the car and had very very milky white oil dripping out of one of the vacuum lines on the back of the intake plenum. I took the whole plenum off and had a lot of this substance dripping out of the bottom. The intake tubes were totally coated and down at the bottom of those tubes they were both full of this substance. My question is this....were these tubes probably full at the bottom when I started the job and now the car is sucking it back up though the intake, and the problem will be solved once I clean out the bottom of the intake tubes and obviously do another oil change.....or is this coming from somewhere else? The oil on the dipstick is milky white as well, along with the oil covering the cams (I pulled the oil fill tube to look inside). I only let the car run for about 45 seconds, so how did all of this oil get contaminated? Here are some pictures of what I found.....
Here is the intake..
Here are the rear intake vacuum lines
Here are the bottom of the intake tubes, full of this stuff!