upper Rad hose collapse and ECT code

the_twig_187 · December 9, 2014

hey guys

I have an odd one here, we have seen 3 others exactly like it in the past few weeks and are stumped. the upper rad hose on the 6.7 is completely collapsed (like you were to pull a vacuum on the cooling system) then we get a code for ECT because the sensor is not submerged in coolant due to the collapsed upper hose. asked a few guys at ford school if they have seen this or what the cause could be and even the teacher was scratching his head. just wondering if anyone else has seen this and what could be causing it?

we have been changing the upper hose and the degas bottle caps and have not seen any of the trucks return

thanks

Chris

lmorris · December 9, 2014

I could see a bad cap doing this, if it wasn't allowing air back into the system when the coolant temp. dropped. Or allowing the system to bleed with out leaving the cap loose.

Keith Browning · December 9, 2014

I agree that the cap was the likely culprit I have seen this on older trucks... new cap fixes the concern. I recently had a 7.3L idi with mud in the overflow bottle and a clogged line that did this.

Matt Saunoras · December 10, 2014

I've seen a few 6.7s collapse the hose over night. Honestly I wasn't sure why but they weren't exhibiting any cooling system concerns at the time.

Anyone know if the 6.7 uses the same cap as the 6.0/6.4?

cbriggs · December 10, 2014

I've seen a few like this as well. That hose collapses very easily, the vacuum created by the temperature drop overnight will collapse it. Depending on what year it is, the ect codes are usually caused by using the block heater. A reprogram will take care of that.