Lower Radiator hose?????
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Postmaster
Joined: Jun 2010
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From: MA
Lower Radiator hose?????
Hey guys, This morning I went out and checked the oil in my 1992 F150 4.9L I was looking around after and noticed my lower radiator hose was flat as a pancake in the middle? So I popped the radiator cap off and the hose went back to normal. Started up the truck let it run in my driveway for about 30mins took it out for a drive hose was fine didnt collapse. Came home and 3 hours later I was going out somewhere and figured I'd check it the hose was going flat again
So I popped off the radiator cap and It went back to normal again. Anyone have any idea whats going on? Lower rad hose it 3years old, radiator is a year old, and thermostat and water pump are 2 years old Thanks
-Cory
So I popped off the radiator cap and It went back to normal again. Anyone have any idea whats going on? Lower rad hose it 3years old, radiator is a year old, and thermostat and water pump are 2 years old Thanks -Cory
Cargo Master
Joined: Jan 2004
Posts: 3,118
Likes: 149
From: South Dakota
From what I have read lower radiator hoses are supposed to have a spring in them to keep them from collapsing. Mainly from collapsing when the engine is running and the water pump is sucking the coolant through the system to circulate the coolant. I would replace the hose.
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Postmaster
Joined: Jun 2010
Posts: 2,688
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From: MA
Ok thanks that probably sounds like the problem that would be causing it. The cap is a few years old but probably something went wrong in it. Thanks
Lead Driver
Joined: Dec 2012
Posts: 7,877
Likes: 49
From: Tennessee
Glad you got it fixed 
thanks for posting the fix . Lots of guys don't understand how a radiator cap works . They can fail either way . Pressure or suction .
thanks for posting the fix . Lots of guys don't understand how a radiator cap works . They can fail either way . Pressure or suction .
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