12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

Where is my antifreeze going?!

Old Oct 27, 2010 | 05:10 PM
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Default Where is my antifreeze going?!

ive been putting water in my radiator several times,at one point i had to use a water hose to fill it up.

i cant find a leak,its not going into the oil, me and dad used a radiator pressure tester and put it to 17.5-18 pounds and it didnt drop pressure or show any leaks so where the heck is my water going!? me and my dad are stumped, weve never seen anything eat water like it does but there is no sign of a leak anywhere.
 
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Old Oct 27, 2010 | 05:54 PM
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When you get into it its probably lifting the head and pushing coolant into the cylinders.
Time for a head gasket. Get the head check while its off.
 
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Old Oct 27, 2010 | 06:13 PM
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+1 for head gasket.
 
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Old Oct 27, 2010 | 06:31 PM
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check your trans fluid... also check your passenger side floor up under the dash
 
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Old Oct 27, 2010 | 06:52 PM
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i checked the oil theres no sign of any water or antifreeze in the oil.

ill check the passenger floor under the dash tomorrow.

also theres some like brown or rust colored stuff inside where the cap goes,like on the inside walls, its like brownish orangish rust color, no smell or anything.. any ideas?
 
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Old Oct 27, 2010 | 07:04 PM
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sounds like perhaps the wrong fluid was used and it's corroding the system...
 
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Old Oct 27, 2010 | 07:19 PM
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thats normal for antifreeze that hasnt been changed in a while.. i would flush and refill the colling system... did u check the transmission fluid for missing antifreeze?
 
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Old Oct 28, 2010 | 05:10 AM
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not yet, im going to check it as soon as i can get outside

soon as i get paid ill flush the system,and change the oil,its about time for it anyway.
 
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Old Oct 28, 2010 | 02:11 PM
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Is it blowing any smoke like a white color?
 
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Old Oct 28, 2010 | 02:43 PM
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no, it smokes light grey at an idle when it first starts but when it warms up it doesent smoke,the smoke is just as black as she can be under a lead foot situation, im going to check the trans fluid and the radiator again here in a sec, i just got back from town.
 
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