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Vacuum hose to oil filler neck?

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Old 04-22-2014, 10:16 AM
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Vacuum hose to oil filler neck?

For the Series II (and I believe the later S I) they added a vacuum hose from the intake nipples (by the washer fluid bottle) that leads to the top of the oil filler neck. What's the point of this? It seems it's lowering the pressure in the oil chamber?

edit: I'm asking because I'll be Seafoaming my car. Those are the nipples recommended to use to inject the SF into the engine, I believe I should be able to use that hose as it's easier to reach and connects to both nipples and nothing else.

Last edited by MinskyBA; 04-22-2014 at 10:34 AM.
Old 04-22-2014, 10:46 AM
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Its was in Mazda's solution to the TSB regarding condensation in the oil (Also known as the Milky Oil TSB).

It is on anything 2006+ or any 2004-2005 that had the dealer perform the TSB.
Old 04-22-2014, 12:35 PM
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Originally Posted by Carbon8
Its was in Mazda's solution to the TSB regarding condensation in the oil (Also known as the Milky Oil TSB).

It is on anything 2006+ or any 2004-2005 that had the dealer perform the TSB.
Thanks!
Out of curiosity - does the lower pressure suck out the moisture (and pass it harmlessly into the engine) ?
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