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Coolant leak turning white and crusty? #4589360
11/29/17 10:22 PM
11/29/17 10:22 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
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.

Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589368
11/29/17 10:28 PM
11/29/17 10:28 PM
Joined: Apr 2017
Posts: 929
SF BAY AREA, CA
dogememe Offline
dogememe  Offline
Joined: Apr 2017
Posts: 929
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.


2007 Crown Vic P71 4.6 ~126K Miles, Royal Purple HPS 5W-30, Royal Purple Filter, Daily Driver, 5K OCIs.
2010 Escape FWD 2.5 ~84K Miles, Castrol Edge EP 5W-30, Wix Filter, Rented on Turo, 10-15K OCIs.
Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589372
11/29/17 10:30 PM
11/29/17 10:30 PM
Joined: Jun 2002
Posts: 12,518
The Motor City
Kestas Offline
Kestas  Offline
Joined: Jun 2002
Posts: 12,518
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.

Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589381
11/29/17 10:36 PM
11/29/17 10:36 PM
Joined: Dec 2013
Posts: 2,183
Fort Worth, Texas
clinebarger Online content
clinebarger  Online Content
Joined: Dec 2013
Posts: 2,183
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.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/Auto
Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589382
11/29/17 10:38 PM
11/29/17 10:38 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
I use the zerex g05 which is supposed to be the mopar equivalent if that helps.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589383
11/29/17 10:39 PM
11/29/17 10:39 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Let me guess, you're running tap water in the coolant, correct ?

Re: Coolant leak turning white and crusty? [Re: clinebarger] #4589384
11/29/17 10:41 PM
11/29/17 10:41 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
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.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Coolant leak turning white and crusty? [Re: Merkava_4] #4589385
11/29/17 10:42 PM
11/29/17 10:42 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
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.


2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589398
11/29/17 10:58 PM
11/29/17 10:58 PM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline
Joined: Jan 2007
Posts: 17,501
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. . . .

Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589405
11/29/17 11:03 PM
11/29/17 11:03 PM
Joined: Nov 2009
Posts: 4,941
Houston, Texas
motor_oil_madman Offline OP
motor_oil_madman  Offline OP
Joined: Nov 2009
Posts: 4,941
Houston, Texas
Merk I think it's like the other guy said. Just the additives coming out from the heat.

Last edited by motor_oil_madman; 11/29/17 11:03 PM.

2007.5 dodge cummins 6.7 liter. Chevron Delo400 15w40. 7000 mile or 250-300hr intervals.

Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589420
11/29/17 11:14 PM
11/29/17 11:14 PM
Joined: Sep 2002
Posts: 4,098
Lakeville, MN
MNgopher Offline
MNgopher  Offline
Joined: Sep 2002
Posts: 4,098
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).

Re: Coolant leak turning white and crusty? [Re: Merkava_4] #4589482
11/30/17 12:37 AM
11/30/17 12:37 AM
Joined: Jun 2003
Posts: 17,348
Deplorable in apple valley, ca
Chris142 Online content
Chris142  Online Content
Joined: Jun 2003
Posts: 17,348
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.


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589504
11/30/17 02:25 AM
11/30/17 02:25 AM
Joined: May 2012
Posts: 5,365
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline
Joined: May 2012
Posts: 5,365
Fort Lauderdale, FL
Just coolant being coolant. Ultra ELC leaves yellow crust. ELC NF leaves pink crust, etc., etc.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589529
11/30/17 04:44 AM
11/30/17 04:44 AM
Joined: Feb 2014
Posts: 2,285
Kansan,1911 45ACP fan
Marco620 Offline
Marco620  Offline
Joined: Feb 2014
Posts: 2,285
Kansan,1911 45ACP fan
Tuna on white no crust from Fast and Furious.


15' Civic 179k.0w20 Redline/Archoil9100,Eibach,Yokohama/Borla Exhaust/Tein Suspension/Fu7317/Redline Si-1
Right to work state proud. Non union household
Re: Coolant leak turning white and crusty? [Re: motor_oil_madman] #4589554
11/30/17 06:36 AM
11/30/17 06:36 AM
Joined: Nov 2006
Posts: 19,910
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,910
MA, Mittelfranken.de
Change the clamp for a constant tension one.


ASE L1, Master. Deutsch Meisterbrief.
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