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oreke oreke is offline
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Join Date: Aug 2010
Posts: 19
vacuum leak question

Hi All,

My '86 944 NA recently failed smog with high NO numbers. HC were good, and CO were really low. After doing a good amount of reading in the forums, I started looking for a vacuum leak. I made a contraption and put in ~10psi to the intake boot. The old boot was leaking terribly from a tear on the bottom, so I replaced it.

Now, when I pressurize the system again, I hear/feel a big huge leak from the bottom of the air/oil separator, where it connects to the engine block. Is this expected or common? Does it mean I have to replace the AOS seals?

Thanks.
Old 02-08-2012, 07:17 PM
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