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post #1 of 15 Old 05-07-2012, 07:21 AM Thread Starter
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DO NOT OVERFILL...

so I haven't seen a thread on here that talks about the coolant fill lines on our degas bottle.

Obviously it has a cold fill line and a line that says do not overfill. So does anyone know the technically/mechanically correct reasoning for the overfill line. What happens if u do? Whats the optimal fill point?

I think I read a while back it has to do with air pockets in your cooling system which can cause cavitation in your water pump (eek!!!!!)

Anyone have the specs or knowledge on this? Obviously engineered for a reason....

As always, thanks in advance for the educated responses and insights. Ford mechanics welcome!!!


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post #2 of 15 Old 05-07-2012, 07:28 AM
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umm.. To allow expansion and contraction in the cooling system...Duhh..





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post #3 of 15 Old 05-07-2012, 07:40 AM Thread Starter
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Quote:
Originally Posted by Six0~Stroker View Post
umm.. To allow expansion and contraction in the cooling system...Duhh..


Thanks for the "educated" response. That's a gimme. Did you even read my post? Not asking why the levels go up and down from liquid expansion/contraction from heating/cooling. I'm asking why specifically the lines are where they are on the degas bottle and what happens if you fill above the overfill line.

Your 6.0 bottles are different than the 6.4 bottles--on the 6.0, the old min line was the new max line.

Please respond according to the question at hand.

*NEW:
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---Stage 1 Intake
---EGR shmock off plates
---Flo Pro Exhaust (5" to 6" tip)
---SCT with GH tunes
---Waiting for first Fuel Filter change to install:
---------CCV Mod
---------CTS2 monitor with EGT Probe
Just passed 1,111.1 miles and LOVING IT!


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and some other goodies...

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post #4 of 15 Old 05-07-2012, 07:42 AM
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Just trying to help





I hope someone that is more "educated" can come in and explain to both of us then

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post #5 of 15 Old 05-07-2012, 07:46 AM Thread Starter
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I know man. I was semi-joking with you. But if you think about it, with our trucks, if the overfill line is directly related to cavitation, this would be very good knowledge to acquire when checking fluid levels and system flushing. I'd hate to have cavitation due to ignorance. ya know?

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---EGR shmock off plates
---Flo Pro Exhaust (5" to 6" tip)
---SCT with GH tunes
---Waiting for first Fuel Filter change to install:
---------CCV Mod
---------CTS2 monitor with EGT Probe
Just passed 1,111.1 miles and LOVING IT!


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post #6 of 15 Old 05-07-2012, 08:00 AM
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That would SUCK

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post #7 of 15 Old 05-07-2012, 08:16 AM
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Quote:
Originally Posted by wilsonw2 View Post
Thanks for the "educated" response. That's a gimme. Did you even read my post? Not asking why the levels go up and down from liquid expansion/contraction from heating/cooling. I'm asking why specifically the lines are where they are on the degas bottle and what happens if you fill above the overfill line.

Your 6.0 bottles are different than the 6.4 bottles--on the 6.0, the old min line was the new max line.

Please respond according to the question at hand.
The overfill line is directly rated to expansion just like in the 6.0.

Fill above that line she'll puke like a drunk prom date every time

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post #8 of 15 Old 05-07-2012, 08:50 AM Thread Starter
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Quote:
Originally Posted by Dave View Post
The overfill line is directly rated to expansion just like in the 6.0.

Fill above that line she'll puke like a drunk prom date every time

Not doubting/questioning you...you have personal mechanical experience with this? What makes it do so? I'm only trying to learn here...

i understand that our systems expand/contract. What i'd like to know is how they came up with the lines on the bottle (physical placements...why not an inch higher or lower?)--vacuum related? pressure related? cold/hot return related?

sorry if i'm not being direct enough. I know 6.0's and other diesels have similar fill lines. Not questioning y'all...just would like to be a bit more 6.4 specific...

thanks in advance!

*NEW:
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NL Fab:
---Stage 1 Intake
---EGR shmock off plates
---Flo Pro Exhaust (5" to 6" tip)
---SCT with GH tunes
---Waiting for first Fuel Filter change to install:
---------CCV Mod
---------CTS2 monitor with EGT Probe
Just passed 1,111.1 miles and LOVING IT!


**SOLD:
2010 F250 CC FX4
H&S
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and some other goodies...

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post #9 of 15 Old 05-07-2012, 03:24 PM
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It's for expansion and contraction. However, it doesn't seem to expand very much. Ford overfilled my coolant after repairing a leaking upper rad hose by a few inches and I was in a hurry to get my truck back since I was going out of town and the service writer as well as the service manager said it was fine to drive the 400+ miles round trip and to come in Monday. Didn't seem to go any higher than it was filled. It probably, wasn't noticeable.


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post #10 of 15 Old 05-07-2012, 05:54 PM Thread Starter
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Still doesn't answer my question as to WHY the lines are measured and placed on the degas bottle where they are. The same reason they got rid of the second return line from the original 2008's...mechanically driven.

*NEW:
2016 F250 CCSB KR FX4
NL Fab:
---Stage 1 Intake
---EGR shmock off plates
---Flo Pro Exhaust (5" to 6" tip)
---SCT with GH tunes
---Waiting for first Fuel Filter change to install:
---------CCV Mod
---------CTS2 monitor with EGT Probe
Just passed 1,111.1 miles and LOVING IT!


**SOLD:
2010 F250 CC FX4
H&S
AFE Intake
and some other goodies...

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