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#4589360 - 11/29/17 09:22 PM Coolant leak turning white and crusty?
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4851
Loc: Houston, Texas
I have a coolant hose on my truck that leaks a bit and it runs down by the cylinder head area. Is it the heat that turns the coolant that into a white crusty color? Guess I need to take a tooth brush or something and brush it off. It has a stainless clamp that needs to be tightened periodically. It seemed pretty tight the last time I checked and I'm worried I'm going to crack the stand pipe that it's connected to if I tighten the clamp anymore. This goes into the cylinder head.

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#4589368 - 11/29/17 09:28 PM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
dogememe Offline


Registered: 04/15/17
Posts: 599
Loc: SF BAY AREA, CA
i just had some used coolant dribble down a hose on my Dodge in the process of flushing it and it left a white crusty stain along the whole thing. I think that's normal is all I'm saying.
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#4589372 - 11/29/17 09:30 PM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
Kestas Offline



Registered: 06/04/02
Posts: 12329
Loc: The Motor City
That's probably the water glass formulated into the antifreeze. Many antifreezes have sodium silicate, which coats the cooling system insides to protect from corrosion.

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#4589381 - 11/29/17 09:36 PM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
clinebarger Online   content


Registered: 12/19/13
Posts: 1912
Loc: Fort Worth, Texas
Replace the hose along with new OEM clamps, It's leaking on the exhaust side of the cylinder head.....It gets pretty hot.
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#4589382 - 11/29/17 09:38 PM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4851
Loc: Houston, Texas
I use the zerex g05 which is supposed to be the mopar equivalent if that helps.
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#4589383 - 11/29/17 09:39 PM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Let me guess, you're running tap water in the coolant, correct ?

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#4589384 - 11/29/17 09:41 PM Re: Coolant leak turning white and crusty? [Re: clinebarger]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4851
Loc: Houston, Texas
Originally Posted By: clinebarger
Replace the hose along with new OEM clamps, It's leaking on the exhaust side of the cylinder head.....It gets pretty hot.


The hose has to be cut off. Don't ask me how I know.
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#4589385 - 11/29/17 09:42 PM Re: Coolant leak turning white and crusty? [Re: Merkava_4]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4851
Loc: Houston, Texas
Originally Posted By: Merkava_4
Let me guess, you're running tap water in the coolant, correct ?


Nope I splurged and used distilled water the last time I changed the coolant.
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#4589398 - 11/29/17 09:58 PM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
Merkava_4 Offline


Registered: 01/30/07
Posts: 17501
Loc: Clovis, CA
Originally Posted By: motor_oil_madman
Nope I splurged and used distilled water the last time I changed the coolant.


Well, that rules out my theory of the white crusties being calcium deposits. . . .

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#4589405 - 11/29/17 10:03 PM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4851
Loc: Houston, Texas
Merk I think it's like the other guy said. Just the additives coming out from the heat.


Edited by motor_oil_madman (11/29/17 10:03 PM)
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#4589420 - 11/29/17 10:14 PM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
MNgopher Offline


Registered: 09/17/02
Posts: 4042
Loc: Lakeville, MN
That's what is left when G-05 leaks and evaporates. Simply the deposits from the additives. When the radiator leaked on my Explorer, that's what was left behind (along with a Y-pipe leak for the rear heater).

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#4589482 - 11/29/17 11:37 PM Re: Coolant leak turning white and crusty? [Re: Merkava_4]
Chris142 Offline


Registered: 06/05/03
Posts: 16819
Loc: Deplorable in apple valley, ca
Originally Posted By: Merkava_4
Originally Posted By: motor_oil_madman
Nope I splurged and used distilled water the last time I changed the coolant.


Well, that rules out my theory of the white crusties being calcium deposits. . . .
the long life coolants leave a white stain when they leak.
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#4589504 - 11/30/17 01:25 AM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
DoubleWasp Offline


Registered: 05/21/12
Posts: 5236
Loc: Fort Lauderdale, FL
Just coolant being coolant. Ultra ELC leaves yellow crust. ELC NF leaves pink crust, etc., etc.
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#4589529 - 11/30/17 03:44 AM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
Marco620 Offline


Registered: 02/25/14
Posts: 2186
Loc: Deplorable Kansan,HK fan!
Tuna on white no crust from Fast and Furious.
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2015 Civic 162k mi.0w20 Redline/Archoil,HPS SRI,Yokohama/Moog links Borla Exhaust/Vibrant Resonator/Tein Suspension
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#4589554 - 11/30/17 05:36 AM Re: Coolant leak turning white and crusty? [Re: motor_oil_madman]
Trav Offline


Registered: 11/20/06
Posts: 18873
Loc: MA, Mittelfranken.de
Change the clamp for a constant tension one.
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