Confirm puking causes
Lead Driver
Joined: Sep 2012
Posts: 7,830
Likes: 96
From: Manteca,Ca
I noticed after the coolent flush last week end the degus was past full the last few days with the defrost on same side as heater core big puddle not coolent mind ya, degus levelwas the same with puck around the cap,may be the gold coolelent / ingreadent involved to look white/pink? look into the chem test result to see whats in the water/ coolent ? distilleled water not suposed to have the sodium content but look at the bottles.and city water has large amounts of Bacteria fighteing agents( clorine /? for drinking Thats why dist water yull get white / just rinse off look at level .check cap for the O-ring and good seal.
Fleet Owner
Joined: Nov 2003
Posts: 27,900
Likes: 3,617
Chris - this is a real interesting point, one that has had a lot of discussion. No doubt you can get "EGR cooler boiling" (and I think that minor episodes of this cause the degas level fluctuations people see), but I personally do not believe a healthy truck will puke from EGR cooler boiling, just because it is run hard. I believe it takes some other failure (like low coolant flows or EGTs well above the adviseable point) to cause puking. Others may (and do based on discussions in other forums) feel differently though.
Fleet Owner
Joined: Mar 2003
Posts: 24,724
Likes: 74
From: Blue Hill Township
What do you consider beyond advisable? I think any egr boiling would not be as much puking as a leaking head gasket. Probably just residue on the bottle around the cap if that makes sense. Obviously a stock truck is going to have a hard time getting that hot.
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Elder User
Joined: Jul 2012
Posts: 654
Likes: 1
From: Fort Lauderdale, FL
Interesting! Though I'm sure that's not what happened to me in this case since I was parked in high idle with IAT temps of about 30 when it happened! I'm guessing it was just over full. What's the best way to monitor EGT? One of these days I need to get more gauges set up in this truck to monitor the stuff that it can't tell me itself...
Fleet Owner
Joined: Mar 2003
Posts: 24,724
Likes: 74
From: Blue Hill Township
I think it certainly is conceivable that it could puke a little/boil the coolant with some of the hot tunes that are out there with EGTs touching 1500*
Elder User
Joined: Aug 2010
Posts: 675
Likes: 1
From: NV
Looks like you do need a thermostat, ECT should be around 190F. Then if you fill to the Min Level and put a new cap on the expansion tank you should have covered the low cost fixes.
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More Turbo
Joined: Jun 2010
Posts: 652
Likes: 1
From: New hampshire
Since then my Coolant Temp has been right on the mark. Maybe luck, maybe some thing else...but the Motorcraft thermostat fixed my cool temp issue.
Eric
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