Primary coolant turned color
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Mountain Pass
Joined: Mar 2009
Posts: 191
Likes: 60
From: Ca Wine country
Primary coolant turned color
Hi all, Happy New year,
Hey just noticed my coolant with about 30k on it turned a dark chocolate color in the last 2k miles. Anybody else noticed this? Going to the dealer on Thur for oil change etc. Going to have it flushed and changed.
Hey just noticed my coolant with about 30k on it turned a dark chocolate color in the last 2k miles. Anybody else noticed this? Going to the dealer on Thur for oil change etc. Going to have it flushed and changed.
Lead Driver
Joined: Jan 2008
Posts: 6,180
Likes: 83
From: Georgia
Matt that was my guess too, but I hope it is a one way trip for the oil. If coolant goes into the oil, it's new engine time. Been there, done that with a 6.4. I think I would call them and ask them to come tow the truck to the dealer.
Fleet Owner
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From: Wisconsin
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Postmaster
Joined: Sep 2006
Posts: 2,598
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From: Maryland
Agreed! I'm not familiar with the what or how of oil cooler failures on a 6.7, but it isn't worth risking. If you are covered under warranty, they will tow the truck on their dime. You would hope that the oil runs at a much higher pressure than the coolant and you shouldn't get coolant contamination in the oil, but once you shut the engine off, the coolant system is still pressurized and can force coolant into the oil since the oil system is no longer pressurized.
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Agreed! I'm not familiar with the what or how of oil cooler failures on a 6.7, but it isn't worth risking. If you are covered under warranty, they will tow the truck on their dime. You would hope that the oil runs at a much higher pressure than the coolant and you shouldn't get coolant contamination in the oil, but once you shut the engine off, the coolant system is still pressurized and can force coolant into the oil since the oil system is no longer pressurized.
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