Question about pressure and level in coolant

[blue62]

Originally Posted by KuaiThunder

Thx for the input the old coolant hose expanded under pressure is something I not consider but it does make sense. Geez I suppose I have lot of hoses to check now and some of them are not easy to access.

Yes and if you don't replicate the conditions a bad hose may be hard to locate.
It May not show it's self as swollen if not fully warmed up and under pressure.
Sometimes you can feel a soft spot in the hose when you squeeze them but that is rare.