Quote:
Originally Posted by rrgrassi
That is usually a sign that the vaccuum pump diaphragm has a tear in it, allowing engine oil to enter the vacuum system.
If the pump was rebuilt by some one else, that means they did not take the time to clean the lines. Engine oil in the vac system will cause all sorts of problems, including ruining a brake booster.
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Can my vacuum pump have a tear in the diaphragm and still put out about 20"hg? I agree with oil in the line causing all sorts of problems. I'm just trying to figure out where the oil is coming from.
I had removed my brake booster yesterday and did not see any signs of oil getting into it. It went bad on it's own.
I know the IP gets oiled somehow. I'm wondering if the shutoff valve would have access to this oil somehow. In other words, is the fact that oil came out of my shutoff valve mean that there is oil getting into the valve from the vacuum pump? Or does that mean the shutoff valve is bad and oil is leaking from the IP to the vacuum system?