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Tan gunk growing/floating in new nissan coolant #4540722
10/11/17 09:49 PM
10/11/17 09:49 PM
Joined: Jan 2015
Posts: 206
Wa
Skanky Offline OP
Skanky  Offline OP
Joined: Jan 2015
Posts: 206
Wa
I have a jug of Nissan L248SP coolant mixed with 50/50 distilled water about 3-4 yrs old. Been using it to add as needed. Today I opened it (been about 8 months since last used)and there is about 1/4" of tan gunk floating on top. I shook it and it does not mix in. I filtered it through coffee filter and it is slimy tan [censored]. Car tank and radiator look fine. Any ideas what it is. I have lots of coolant stored and none have [censored] growing in them. I have no intention of using it just wondering if it will grow more, its in new clean jug. I will post pics tomorrow.

Re: Tan gunk growing/floating in new nissan coolant [Re: Skanky] #4540749
10/11/17 10:22 PM
10/11/17 10:22 PM
Joined: Jul 2008
Posts: 456
Maryland USA
rubberchicken Offline
rubberchicken  Offline
Joined: Jul 2008
Posts: 456
Maryland USA
Sounds to me like a bit of oil got into container.

Re: Tan gunk growing/floating in new nissan coolant [Re: Skanky] #4540751
10/11/17 10:23 PM
10/11/17 10:23 PM
Joined: Jun 2014
Posts: 2,443
Phoenix, Arizona - USA
SirTanon Offline
SirTanon  Offline
Joined: Jun 2014
Posts: 2,443
Phoenix, Arizona - USA
Odds are it will grow more. What you see collected at the top, which you filtered off is simply the part of it that grew and collected. I'd be willing to bet there's other... stuff.. in there that will continue to grow.

Almost sounds like a 'mother' of some sort.


2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 261,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 56,000mi
Re: Tan gunk growing/floating in new nissan coolant [Re: Skanky] #4540762
10/11/17 10:49 PM
10/11/17 10:49 PM
Joined: Jan 2015
Posts: 206
Wa
Skanky Offline OP
Skanky  Offline OP
Joined: Jan 2015
Posts: 206
Wa
Ya no way it has oil in it, original Nissan container. No oil smell and I have seen oil in coolant over the years not the same. Some other sort of growth, bacterial? Algea?
its Ethylene Glycol and contains no Amines, Silicates or Borates.

Last edited by Skanky; 10/11/17 11:01 PM.
Re: Tan gunk growing/floating in new nissan coolant [Re: Skanky] #4540965
10/12/17 08:10 AM
10/12/17 08:10 AM
Joined: Aug 2003
Posts: 12,895
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,895
NE,Ohio
its growing some kind of bacteria/slime/algae most likely.

Diesel fuel can as well.

I wouldnt use it.


2019 Jeep Cherokee Trailhawk 2.0T
Re: Tan gunk growing/floating in new nissan coolant [Re: Skanky] #4541548
10/12/17 08:14 PM
10/12/17 08:14 PM
Joined: Jan 2015
Posts: 206
Wa
Skanky Offline OP
Skanky  Offline OP
Joined: Jan 2015
Posts: 206
Wa
nope not going to use it, just watching it and wondering if anyone else has ever seen it. I never have.

Last edited by Skanky; 10/12/17 08:28 PM.
Re: Tan gunk growing/floating in new nissan coolant [Re: Skanky] #4555189
10/26/17 01:46 PM
10/26/17 01:46 PM
Joined: Sep 2004
Posts: 7,518
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,518
Marshfield , MA
Take it back or use it? If the seal wasnt broken..


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Tan gunk growing/floating in new nissan coolant [Re: Skanky] #4559202
10/30/17 11:11 AM
10/30/17 11:11 AM
Joined: Jan 2015
Posts: 206
Wa
Skanky Offline OP
Skanky  Offline OP
Joined: Jan 2015
Posts: 206
Wa
Nissan finally got back to me, Their engineers say it is the water pump seal lubricant they add. If it gets too old it can separate. They said don't use it. It was from E-bay so who knows how old it was before I opened it. The bottle I filtered did not grow anymore and now its been pitched. Car still looks good no residue in tank or in neck at radiator cap. However the car also has norosion in it 1 pint every year. The older version is what I have with the molybade.

Re: Tan gunk growing/floating in new nissan coolant [Re: Skanky] #4559755
10/30/17 11:14 PM
10/30/17 11:14 PM
Joined: Aug 2006
Posts: 9,801
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,801
Central Washington
Interesting and excellent explanation from Nissan.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2

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