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Info On A Bac Valve......

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Old 12-27-04, 12:00 PM
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Question Info On A Bac Valve......

I Just Need To Know Is It Possible For A Bac Valve To Leak Coolant Down Into The Engine??? I See A Coolant Pipe Above The Bac But Is That A Closed Pipe Or Does That Run Down Into The Bac Assembly??? I Have A 91n/a....any Ifo On This Anyone?
Old 12-27-04, 12:05 PM
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The coolant runs through a separate casting attached to the BAC.
There is no coolant passage into the BAC.
Old 12-27-04, 12:05 PM
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that coolant hose has nothing to do with the BAC valve
Old 12-27-04, 12:06 PM
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dammit SureShot....posting at the same time as me!!
Old 12-27-04, 12:14 PM
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Originally Posted by Funkspectrum
dammit SureShot....posting at the same time as me!!
No worries - Now if we could just figure out why Mazda did that.
Maybe just to keep the hose from flopping around?
Maybe to cool a hard working BAC in a summer traffic jam?
Old 12-27-04, 12:39 PM
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Originally Posted by SureShot
No worries - Now if we could just figure out why Mazda did that.
Maybe to cool a hard working BAC in a summer traffic jam?
Actually the opposite, the coolant passage is there to warm a frozen BAC in the winter.
Old 12-27-04, 01:08 PM
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Could the BAC freeze? Isn't just a electrically operated valve?
Old 12-27-04, 02:20 PM
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Originally Posted by pmr2000
Could the BAC freeze? Isn't just a electrically operated valve?
Originally Posted by NZCONVERTIBLE
This is one of those old wives tales Aaron mentioned. If the BAC valve is so cold it can freeze, then the engine is obviously not running, in which case the coolant will be just as cold as the BAC valve.
More works of wisdom from our friend from New Zealand!
Old 12-27-04, 03:13 PM
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I can see condensation icing being a factor under some conditions in an NA, but not a turbo.
The aircraft guys can tell all about that.
Old 12-27-04, 03:27 PM
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thanks guys for the info....
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