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Discussion Starter · #1 ·
My 2005 S40 has about 33,000 miles. I noticed recently that the coolant has changed from the flourescent green color to a brownish color. Is this something to worry about? Just drain, flush and refill?
 

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Re: Coolant color (Seitch)

For the longest time, I've thought of our coolant to be orange. I don't remember if it was green. I recently had the dealer check to see if my coolant was leaking. They didn't say anything about the color, so I guess it's okay.
 

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Re: Coolant color (Seitch)

hmmmm<p><A HREF="http://forums.swedespeed.com/zerothread?id=64083#607182" TARGET="_blank">http://forums.swedespeed.com/z...07182</A>
 

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Re: Coolant color (Seitch)

Well that happened w/ my Audi. (Which has a pink colored fluid) Usually thats a sign of a bad head gasket. Dont freak <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/eek.gif" BORDER="0"> on account of me though. I dont know jack about how our engines work and coolant color really. Im just saying you may want to take it in and ask them why the color has changed to brown, because like I said that might be oil from a bad head gasket. Easy fix usually.<p><br>EDIT: Then again Grecian may be right in that it just changes color. At any rate, ask the pros.<br>
 

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Re: Coolant color (Seitch)

My coolant is brown too! Also thicker than what I'm used to. I just had it in for the 22.5k service and they made no mention of if it. I'm going to the dealership this week to p/u some parts. I'll ask about it then.
 

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only time I've seen brown coolant is when the head gasket blew and oil got in the coolant...
 

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Re: (quick)

DONT press the panic button...all this talk of head gaskets etc. is a joke..<br>buy yourself a coolant tester and test it...takes 5 minutes...it should be good for approx -20 degrees farenheit...if not flush it...
 

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Re: Coolant color (theVword)

Two questions for those with discolored coolant:<p>- Automatic or manual transmission?<p>- What does the engine oil look like on the dipstick?<p>Tom.
 

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Discussion Starter · #9 ·
Re: Coolant color (tmtalpey)

<br>Automatic.<p>The oil looks fine, oil changed at 30K, 34K now, color of oil is clear and brownish amber.
 

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Re: Coolant color (Seitch)

<B>You need them to check the transmission oil for coolant contamination. </B>It's quite possible that the transmission oil cooler has developed a leak. Is the car shifting funny?<p>Tom.
 

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Re: Coolant color (Seitch)

On coolants, isn't there the old green stuff, which I believe was recommended for change every 2 years, which I've always done (rust inhibitor & water pumb lubricant diminishes),<br>and, the newer, 5 year stuff, introduced by GM maybe, which is orange/brown. This 5 year stuff is reported to get murky/muddy in some vehilces, cause not well known. (One local parts guy told me not have any green stuff in with the 5 yr. brown stuff.)
 

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Re: Coolant color (steve909)

Mixing coolants is instant trouble. DO NOT mix the orange/red coolants with the green. They are NOT COMPATABLE. A complete drain, flush, & refill is required. But since Volvo uses the green coolant I'd just drain, flush, & refill with the green coolant. My diesel truck engine is very coolant sensitive, problem known as cavitation. It also need all eight GALLON of coolant changed every 50,000 miles. Good luck finding someplace to recycle Your old antifreeze.
 

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Re: Coolant color (tmtalpey)

tmtalpey- Auto tran, oil color is normal.<p>I'm bringing the car in this afternoon to get it checked out. Something defintely is not right. The brown layer is on top of the coolant (green btw). Shifting is not smooth, but it hasn't been since day 1. I'll let everyone know their diagnosis and fix.
 

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brown layer on top of green is probably oil. Tom's suggestions are correct. <p>FWIW you can have oil in the coolant w/o coolant in the oil. Been there done that.
 

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Discussion Starter · #15 ·
Re: Coolant color (tmtalpey)

<br>Ok, I'll check the transmission fluid. Nope, I haven't noticed anything different with the shifting.
 

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Re: Coolant color (Seitch)

You need them to check the fluid. First of all, it's hard to get to and second you need to use a contaminant test. It's not generally obvious visually.<p>Really, don't mess around with this. It's a warranty issue and not worth your time to diagnose. My opinion.<p>Tom.
 

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There is a TSB on possible contamination.<br>I'd go ahead and have it checked. I've posted the bulletin before, don't have time to look it up right now, will later if needed.....<p>here it is<p><A HREF="http://www.alldata.com/tsb/Volvo/1135065600000_1138780800000_TNN43-48/index.html" TARGET="_blank">http://www.alldata.com/tsb/Vol....html</A><BR><BR>
<i>Modified by bpwrightwv at 11:27 AM 8-25-2006</i>
 

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Discussion Starter · #18 ·
Re: (bpwrightwv)

Wow, thanks to you and Tom (tmtalpey). I brought the car into the dealer this morning and they confirmed that the coolant is contaminated. They will be replacing the transmission oil cooler. <p>They didn't want to test the transmission fluid but I've insisted and they'll be doing that. But from the TSB that you posted, it says that if coolant is detected in the transmission fluid, both the cooler AND the TRANSMISSION need to be replaced!<p><BR><BR>
<i>Modified by Seitch at 3:29 PM 8-25-2006</i>
 

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Re: (Seitch)

You're welcome! But I didn't want to scare you too much. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0"> <p>If they do find contamination in the transmission fluid, you should insist that they perform a complete flush and fluid replacement. But frankly, I would not insist on a new transmission. If it has been logged that this occurred within the warranty period, and the determination was that no damage had occurred, then my feeling is you'll be fine. In the unlikely case you're not then you have the paper trail.<p>Tom.
 

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Re: Coolant color (POWERSTROKE)

A piece of info about the green and orange coolants (there may be exceptions to the rule though so check the label to be sure)<p>Green = Ethyleneglycol based. Needs proper recycling.<br>Orange = Propyleneglycol based. Without various additives, you can (almost) drink this stuff. Environmentally friendly.<p>I repeat, do not count on that the color always tells what it is but I have some experience with selecting proper antifreeze solutions for rain gauges. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/embeer.gif" BORDER="0">
 
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