Bad sign? white spots under the hood - Ford Powerstroke Diesel Forum
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Old 05-22-2011, 06:42 PM
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Bad sign? white spots under the hood

i have been running the 175 spartan tune for about 2 weeks. noticed today that i have white spots under my hood closest to the driver. is this flash boil sign? what does this mean?
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Old 05-22-2011, 08:54 PM
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You may have a bad coolant reservoir cap. Start out by replacing the cap. If that doesn't fix it, it could definitely be the EGR coolers flash boiling.
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Old 05-23-2011, 04:03 AM
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So if its not the cap the only.way.to.keep.from.flash.boiling is EGR delete? And shouldn't it only flash.boil if my EGR temp gets over 1400?
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