Joint Custody
Well-Known Member
Just wondering if this is normal both engines upper hoses are collapsed when boat not running.
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My port side collapses about half that much, starboard side is fine.
My port side collapses about half that much, starboard side is fine.
Very normal with the 6CTA due to the design of the overflow. The tank is so far away and below the coolant reservoir, and has such a small hose, that the pressure needed to pull coolant back up is pretty high. Unless it is brand new and very stiff, the larger hose collapsing is an easier pressure relief. My mechanic pointed that our and suggested moving the overflow otherwise it's largely ineffective.Just wondering if this is normal both engines upper hoses are collapsed when boat not running.
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If it was common I would have the problem...I am never specialThanks all. I will look into the caps. Good to see it is a common issue.
The correct cap, besides the right pressure, has a small 1/2" or so sized washer like stem with an o-ring between it and the cap. It has a small spring that holds it tight. When the system is pressurized that is held in place by the pressure, but when the engine cools down it allows coolant to return to the system from the overflow bottle by the vacuum created by the coolant shrinking in size when it's cooled.
If the hose gets soft, as mentioned above, it will collapse and not bring as much coolant back into the system. A collapsed hose in NOT normal, it may be a bad hose design and needs the spring to allow the coolant back into the system. Whether it came from the factory that way or not, I would find a spring to place in the hose.