How is the coolant level? Also, when was the last time the hose was changed?

The hose collapse is from a vacuum created by temp difference. Water does not compress, but steam will, and as steam condenses, the pressure decreases to the point that atmospheric pressure is greater than the pressure inside the hose, resulting in a collapse. A waek hose or low coolant level is usually the culprit.

CSX had a tank car collapse after workers steam cleaned the interior, during cold weather, and did not vent the car to keep the pressure even. The car collapsed like an aluminum can. I can send you a picture of it.

__________________
RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D