coolent level?
Post Fiend
Joined: Jan 2009
Posts: 6,521
Likes: 11
From: Greenwood, SC
No, don't keep it lower. Coolant runs through the EGR coolers, they need all they can get. The weak link to puking or hydro-lock. EGR cooler is a big deal, hydro lock will win you a new engine.
Tuned
Joined: Jul 2007
Posts: 413
Likes: 1
From: Tennessee
Based on my experience with dealers, I'd do as everyone here advises and keep it at the top mark. The "dealer" left my transmission 3.5 quarts low after a radiator change. I DEFINITELY didn't keep it there. I keep my coolant level a little above the min cold line, as rush and senix state. Those egr coolers are a big deal and definitely don't need to suffer from low coolant levels.
Super Moderator
Joined: Aug 2008
Posts: 37,370
Likes: 1,858
From: Frederick, MD
you don't want that lower inlet on the degass bottle to be exposed and then the motor sucks in air.
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Elder User
Joined: Feb 2009
Posts: 950
Likes: 0
From: nc
Interesting
This is interesting. My truck is well above the lower inlet line but right on the cold mark on the bottle. That is since its warmer outside. During the real cold days it would be slightly below the low line or cold fill mark but well above the lower inlet hose. The funny thing is i could fill this up to the upper line and it slowly works back down to the same point after a few weeks. So now i no longer fill it up each month and it hasn't moved in 6 months except since its warmed up outside its now just above the lower hash line or cold fill mark. Also, i've noticed on the 2010 trucks the marks on the bottle are lower than they were on the 08's. Looks to me Ford has realized people were putting too much in the bottle. Not sure but i can't understand why they lowered the marks.
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Elder User
Joined: Feb 2009
Posts: 950
Likes: 0
From: nc
not really sure but from what i can see everything looks the same except for the bottle. I would like to know for sure why the change though. All i know is if i get up toward the high mark on the bottle then i loose coolant and gain phosphorus in my oil analysis. Phosphorus is normally a sign of a coolant leak. The numbers are on the low side but obviously some coolant makes it into the engine somehow.
Fleet Mechanic
Joined: Dec 2002
Posts: 1,664
Likes: 188
Mine was all over the place until I got it worked out and stuff replaced. It now is at the lower cold mark and gets up a little higher then the upper mark when warm. When it was cold out here this past week end it was down just a little like Sawtooth's does.
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