Radiator hose collapses
Thread Starter
Racer
Joined: Nov 2005
Posts: 262
Likes: 1
From: St. Petersburg FL
Radiator hose collapses
The lower radiator hose coming from thermostat on my '01 M6 collapses when the engine is cold. It is firm when engine warms up and feels okay.
Is this normal or is it time to replace hose?
Is this normal or is it time to replace hose?
Team Owner
Joined: Dec 1999
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Mine does that....no biggy...FWIW I replaced my hoses at 50K....they still looked fine....probably should have done it sooner just as part of general maintenance. Did the belts at the same time...
Burning Brakes
Joined: Oct 1999
Posts: 920
Likes: 2
From: Rogers, AR, USA
You have a coolant expansion tank. As the coolant heats and expands, the excess volume goes into the tank and when the coolant cools off, it should freely pull the coolant back into the engine cooling system. If it doesn't, the valves that regulate this flow are stuck. It shouldn't collapse the hoses.
Le Mans Master
Joined: Sep 2003
Posts: 8,847
Likes: 795
From: Longview Texas
Originally Posted by dpd
,you have a bad cap Hoses should never collapse, and it is not the fault of the hose.
If the hose on the inlet of the water pump is collapsing, I would be worried about starving the water pump.
Last edited by TEXHAWK0; Mar 5, 2006 at 06:23 PM.
Thread Starter
Racer
Joined: Nov 2005
Posts: 262
Likes: 1
From: St. Petersburg FL
Originally Posted by Patches
Check your overflow tank pressure-relief cap.
I unscrewed the cap and removed, washer looks okay.
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Team Owner
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So what if it does it periodically?? I would think if my cap was bad it would do it all the time.
Racer
Joined: Jan 2003
Posts: 493
Likes: 1
From: Goose Creek SC
Collapsing Hose
Only takes once for the hose to collapse and starve the water pump. The relief valve may not stick every time because the driver may not use his car the same way everytime or the weather conditions may change. Used to be a pretty common thing "back in the day" and you would change the radiator cap.
Team Owner
Joined: Oct 2001
Posts: 46,766
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From: Boynton Beach Florida
St. Jude Donor '07-'12, '20
Originally Posted by pewter99
So what if it does it periodically?? I would think if my cap was bad it would do it all the time.
Replace the cap you cheap bastard. 
