Coolant reservoir look milky, oily, and dirty

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Thread: Coolant reservoir look milky, oily, and dirty

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    Coolant reservoir look milky, oily, and dirty

    After changing a new radiator on my 300c srt8 chrysler, I started to noticed the coolant reservoir looking
    Kind of milky,oily, and residue-ish. First thing on my mind is a blown gasket. Drove to a shop got got an inspection and no sign of bad or blown gasket. Dye the coolant and that also came up negative. So the tech require a complete flushed, got that done ASAP. Next day drove to work and back home, pop the hood looked inside the reservior coolant and the same milk,oily residue came back. Is that normal for the coolant to look like that after all inspection for gasket came up negative and no leaks of any oil or coolant. HELP NEED ANSWER ASAP

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    4.4 Liter Supercharged Northstar tripowergto's Avatar
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    Re: Coolant reservoir look milky, oily, and dirty

    Can't be good.
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    Re: Coolant reservoir look milky, oily, and dirty

    Help any clue or answer

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    Re: Coolant reservoir look milky, oily, and dirty

    really sounds like oil getting in the coolant somehow. im thinking you should probably be on a chrysler website asking about this sort of thing

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    6.2 Liter LS3 V8 Premium Member jzchev28's Avatar
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    Re: Coolant reservoir look milky, oily, and dirty

    sounds to me like either a bad head gasket, cracked head, or block...but you need to have it better checked out im thinking.

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    Re: Coolant reservoir look milky, oily, and dirty

    Go to a shop and have them check the transmission and radiator coolant lines. You could have trans fluid getting into your coolant.

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    Re: Coolant reservoir look milky, oily, and dirty

    if before radiator replace everything was ok, no Your describe symptoms show up, this can mean not proper system cleaning after replacing radiator and refilling new coolant, if i remember right it require at least 5 times clean up system by refilling it, heated it and drying it before filling working one which stays for next time fluid change after 3-6 year depend of coolant type

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    Re: Coolant reservoir look milky, oily, and dirty

    I agree with Danaon. I dont own a car like yours, so I'm not an authority on it, but......Most likely, your transmission has a "transmission cooler" just like the one in my Nissan Xterra. The transmission coolant is routed THRU the radiator on my truck and most likely your SRT8 300. On the Xterra, it is a known design problem where the line that runs THRU the radiator carrying the transmission fluid CRACKS. This allows coolant into the transmission fluid, and transmission fluid into the coolant. If the car has an oil cooler, it could also be THAT line that has cracked.

    ASAP, check your oil dipstick and see if there is coolant in your oil. It will look like milky crap is mixed into your oil. Then, check your transmission fluid dipstick for the same thing, but this time it will look like a strawberry milkshake! If you get coolant in your tranny it will kill it. Same for coolant in your oil. Since your radiator was JUST replaced, I am pretty certain this is what has happened. Good luck.
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    Re: Coolant reservoir look milky, oily, and dirty

    If the Head gasket is OK and everything else is up to par then you might have a porous block in which the coolant is able to contaminate the oil, this is the only other thing that can cause that symptom.

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    Re: Coolant reservoir look milky, oily, and dirty

    Quote Originally Posted by JeffInDFW View Post
    I agree with Danaon. I dont own a car like yours, so I'm not an authority on it, but......Most likely, your transmission has a "transmission cooler" just like the one in my Nissan Xterra. The transmission coolant is routed THRU the radiator on my truck and most likely your SRT8 300. On the Xterra, it is a known design problem where the line that runs THRU the radiator carrying the transmission fluid CRACKS. This allows coolant into the transmission fluid, and transmission fluid into the coolant. If the car has an oil cooler, it could also be THAT line that has cracked.

    ASAP, check your oil dipstick and see if there is coolant in your oil. It will look like milky crap is mixed into your oil. Then, check your transmission fluid dipstick for the same thing, but this time it will look like a strawberry milkshake! If you get coolant in your tranny it will kill it. Same for coolant in your oil. Since your radiator was JUST replaced, I am pretty certain this is what has happened. Good luck.
    Bad head gasket...check you tailpipe, in cold weather, for larger than normal volume of steam. If it smells sweet...Head gasket.

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    Re: Coolant reservoir look milky, oily, and dirty

    Quote Originally Posted by JeffInDFW View Post
    I agree with Danaon. I dont own a car like yours, so I'm not an authority on it, but......Most likely, your transmission has a "transmission cooler" just like the one in my Nissan Xterra. The transmission coolant is routed THRU the radiator on my truck and most likely your SRT8 300. On the Xterra, it is a known design problem where the line that runs THRU the radiator carrying the transmission fluid CRACKS. This allows coolant into the transmission fluid, and transmission fluid into the coolant. If the car has an oil cooler, it could also be THAT line that has cracked.

    ASAP, check your oil dipstick and see if there is coolant in your oil. It will look like milky crap is mixed into your oil. Then, check your transmission fluid dipstick for the same thing, but this time it will look like a strawberry milkshake! If you get coolant in your tranny it will kill it. Same for coolant in your oil. Since your radiator was JUST replaced, I am pretty certain this is what has happened. Good luck.
    Nice analysis, doc. What a lazy man's way to cool trannie fluid. Another ten bucks for a mini cooler, it seems, might work better and surely would not set you up for disasters such as this.

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    Re: Coolant reservoir look milky, oily, and dirty

    Take it to your local Dodge/Chrysler dealer? If the problem came right back, the shop who looked at it might not know what they are looking at....


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    Re: Coolant reservoir look milky, oily, and dirty

    Sounds like an electrical problem. See #7 below:

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    Re: Coolant reservoir look milky, oily, and dirty

    Quote Originally Posted by Neanderthal View Post
    Nice analysis, doc. What a lazy man's way to cool trannie fluid. Another ten bucks for a mini cooler, it seems, might work better and surely would not set you up for disasters such as this.
    It is not just a transmission cooler it also warms the trans fluid in cold weather.
    Would definetly look into the engine oil and trans fluid coolers in the radiator as a culprit.

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    Re: Coolant reservoir look milky, oily, and dirty

    yea sounds like you have fluid of some kind mixing in with the coolant i'd have that item looked at immediately by a professional mechanic since it could lead to much more serious issues if left unchecked
    Last edited by GMfan1111; 01-21-2012 at 11:18 PM.
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