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Old 05-02-2012, 02:34 PM   #1
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Default Brown sludge in coolant ?

2000 Chy Voyager 3.3l. Dosn't overheat but a month or so back I found the coolant was a sludge almost mud type of mixture. One of the boys thought maybe he poured trans fluid in by mistake. The other bouth and added they wrong type of anti freeze. So I flushed it 3 times over 2 days and refilled it.
Well it looks like mud again. Real thick, almost dries like clay.
Help needed !!!!
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Old 05-02-2012, 02:55 PM   #2
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1. Good answer. Flush again in case the sludge is residue that the new coolant is washing off the inside of the lines (good).

2. Bad answer. Take off your oil cap, look inside, remove your dipstick and look at it to see if you have residue there or clean oil. If residue, you may have a blown head gasket and have oil and antifreeze mixing (bad).
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Old 05-02-2012, 10:03 PM   #3
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Only thing I can think of aside from what Flyn said, if you did any recent work to it, didn't let the RTV fully cure before pouring antifreeze in, it likes to wash up by the cap. But that's a little grayer of a brownish color...
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Old 05-02-2012, 10:07 PM   #4
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Chocolate milkshake is oil. Strawberry milkshake is ATF. Yours sounds like oil.

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1. Good answer. Flush again in case the sludge is residue that the new coolant is washing off the inside of the lines (good).
Even if that is the case it was leaking at some point. If he has never noticed the problem before, odds are its still leaking. Gotta fix the problem, not the symptom.
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Old 05-03-2012, 12:44 AM   #5
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Easy enough to check if it's red pill or blue pill by looking at the oil. Blue pill is less likely but MUCH cheaper to fix. Red pill is expensive, sometimes to the point of taking the vehicle to Carmax and getting what you can for it.
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Old 05-03-2012, 12:53 AM   #6
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Oil looks great. Trans was rebuilt after I flushed.
I don't think it's left over, but could be, but the vents all look filled. I'll try having it flushed again next week.
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Old 05-03-2012, 12:54 AM   #7
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Maybe it's stop leak? I've had a couple people put stop leak in and eventually it turned to sludge. I had to back flush the shit outta the heater cores for a while. I just kept flushing until it was all out.
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Old 05-03-2012, 01:21 AM   #8
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No I didn't add anything just the dodge style anti freeze.
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Old 05-03-2012, 03:38 PM   #9
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Just because you're getting oil in the coolant doesn't mean you will get coolant in the oil.
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Old 05-03-2012, 03:41 PM   #10
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Thats the start of a blown head gasket. If you had oil or trans fluid in the coolant you would know right away
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Old 05-03-2012, 03:44 PM   #11
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Exhaust and coolant do funny things when mixed together.
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Old 05-03-2012, 03:47 PM   #12
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Quote:
Originally Posted by Sprayin View Post
Just because you're getting oil in the coolant doesn't mean you will get coolant in the oil.
If oil goes into cooling system, coolant should be in oil considering the cooling system is under pressure and would go right through where the oil came from.
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Old 05-03-2012, 03:47 PM   #13
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Check for exhaust gasses in coolant.
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Old 05-04-2012, 12:51 AM   #14
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Quote:
Originally Posted by C.Evans View Post
If oil goes into cooling system, coolant should be in oil considering the cooling system is under pressure and would go right through where the oil came from.
researching this on google, quiet a lot of arguments about this statement..lol
Many said even though they flushed it would come back several times as it gets stuck in pockets. Many think its air mixing in the system or mixing of anti-freeze. I'll get the cooling system pressure checked.
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