Truck dumping antifreeze out of reservoir. - Page 2 - Dodge Cummins Diesel Forum
07.5 - 09 3rd Gen 6.7L Performance Parts Discussion Discussion of Performance Parts For the 6.7L Trucks...NO ADVERTISING

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post #13 of 18 (permalink) Old 08-10-2009, 10:39 PM
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Mine has been doing it for a while, it has not gotten any worse. I dont think it is a head gasket. No other signs of a head gasket being blown. Mine only leaves little water spots on the hose below the overflow, never have seen it just pour ot.


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post #14 of 18 (permalink) Old 08-10-2009, 10:50 PM
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The 6.7s don't show normal signs off a blown headgaskets every gasket I've seen has it blows between the cylinders where the stem holes are and it will pressurize the coolant system causing it to puke or spray ... if your coolant resivoir is bubbling and over flowing it's most likely a blown headgasket
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post #15 of 18 (permalink) Old 08-11-2009, 12:47 AM
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head gasket..... Same things happenin to my built raptor 700 right now, my oring took a and the compression is blowing into pressurize the coolant and blows it out of the overflow! Check your radiator i bet its low... I even have studs on my quad not that it matters but its funny how this stuffs comes about in the same matter when yo start modding!!

I am only running the 425 studs the cheap arp's ang have complete fueling mods nozzles cp3 and lifter pump and xrt mp8 and no issues, just awaiting my air and i will see if the 425s will do justice wich they should cause every high horse 6.7 right now has only used the 425's

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post #16 of 18 (permalink) Old 08-11-2009, 06:47 AM
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Get the 425's.....you be coo.

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post #17 of 18 (permalink) Old 08-11-2009, 07:56 AM
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Here is a test kit you can buy that will detect combustion gases in the coolant.

UVIEW 560000 Diesel & Gas Combustion Leak Tester Kit - eBay (item 200276192949 end time Aug-12-09 12:30:48 PDT)
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post #18 of 18 (permalink) Old 08-19-2009, 02:02 PM
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Quote:
Originally Posted by MattTN23 View Post
But usually with a blown head gasket aren't there other signs? The truck doesn't loose boost or stutter or anything. Wouldn't it be causing something other than just blowing out antifreeze?
Not necessarily. Mine had no other symptoms exept the sound of water sloshing in the dash area, and blowing out antifreeze into the overflow. No water in oil, no oil in water, no overheating. But.... if exhaust gasses are being blown past a compromised head gasket and into the cooling system, you will eventually build up enough pressure to blow past the cap and into the overflow. This would cause the level in the radiator to drop, while the level in the overflow would rise. Mine was definitely a blown head gasket.

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