collapsed coolant hose

Topic: collapsed coolant hose (Read 635 times) previous topic - next topic

collapsed coolant hose

August 11, 2020, 11:38:46 am

good morning everyone,
I was looking around the engine today and saw this!
is something else happening besides needing a new hose?
I drove about 100 miles yesterday with no issues, temp 180. no coolant lost.
curious to know how much coolant will come out when the hose gets replaced to see if i can do it myself.
I'll look for a part # but dont know exactly where the hose is coming and going from to identify it.

thanks
frank

Re: collapsed coolant hose

Reply #1 – August 11, 2020, 12:08:36 pm

That is not a problem in my opinion, vacuum from the engine cooling sucked it in. As soon as there is pressure it will expand. I can't remember if that hose had an internal spring or not.

Re: collapsed coolant hose

Reply #2 – August 11, 2020, 12:14:36 pm

With the engine running and fully warmed up (so water is flowing through the radiator) see if the hose expands to original shape or collapses further.

Would not take much pressure (pressure radiator cap) to expand it.

Re: collapsed coolant hose

Reply #3 – August 11, 2020, 12:17:16 pm

It would be suction side as it on the bottom of the radiator. But like Brett says if at normal temp it is expanded not an issue.

Re: collapsed coolant hose

Reply #4 – August 11, 2020, 12:47:40 pm

no wire helix in the hose craneman.

thank you both for a quick reply. i will keep an eye on it.

Re: collapsed coolant hose

Reply #5 – August 11, 2020, 12:49:10 pm

If you choose to replace it, take hose to NAPA and get one to match.

Drain 18 gallons of coolant, at least for my ISM radiator.

Plus, I agree on no replacement if swells back up during normal operation.

Re: collapsed coolant hose

Reply #6 – August 11, 2020, 01:09:22 pm

Check the pressure cap. If the pressure cap is operating correctly the hose should not collapse because the engine cooled.

Re: collapsed coolant hose

Reply #7 – August 11, 2020, 01:15:36 pm

Quote from: TGordon – August 11, 2020, 01:09:22 pm

Check the pressure cap. If the pressure cap is operating correctly the hose should not collapse because the engine cooled.

The cap has to pull vacuum on the engine in order to pull the coolant back out of the recovery bottle.

Re: collapsed coolant hose

Reply #8 – August 11, 2020, 02:04:20 pm

Quote from: craneman – August 11, 2020, 01:15:36 pm

The cap has to pull vacuum on the engine in order to pull the coolant back out of the recovery bottle.

That is true.

Is the line to the recovery bottle blocked?
Is the recovery bottle vent plugged?
Does the hose inflate if the cap is removed?
Does the hose inflate as the engine warms?
Is it time to replace the hose?

That is all that I can think of.

Re: collapsed coolant hose

Reply #9 – August 11, 2020, 02:10:12 pm

That hose has no spring inside,Foretravel does stock that one and so does siliconehose.com.

Re: collapsed coolant hose

Reply #10 – August 11, 2020, 03:13:46 pm

I've seen this before when the closed system radiator cap was bad and does not allow the vacuum created by engine cooling to draw coolant back out of the expansion tank. So the vacuum collapses a hose.
Yes the blue color of that radiator hose indicates it is silicone which is relatively soft and possibly the weakest point acted upon by the vacuum. Silicone hoses last a long time so I would doubt that the hose in question is compromised.

I guess there could a blockage in the hose from the reservoir neck to the expansion tank. Easy enough to check when you remove the radiator cap end see if the lower hose returns to its normal shape. Just make sure the engine is COOL.
Steve

Re: collapsed coolant hose

Reply #11 – August 11, 2020, 03:30:05 pm

I don't know how the cap could cause this. It holds pressure one way and if the seal to create vacuum goes bad then there would be no vacuum in the expansion tank. A blockage between the expansion tank to the recovery bottle could create more vacuum in the engine. Would like to figure out another way the cap could fail and not pull from the recovery bottle but pull vacuum on the engine.

Re: collapsed coolant hose

Reply #12 – August 11, 2020, 03:43:11 pm

Radiator Cap Function and Operation

Re: collapsed coolant hose

Reply #13 – August 11, 2020, 04:02:06 pm

Will look at my engine but that hose is on the bottom of the radiator,if the engine water pump is sucking from that side could the
radiator be partially plugged up?Think that is why some hoses have the spring inside.

Re: collapsed coolant hose

Reply #14 – August 11, 2020, 04:19:57 pm

Quote from: SteveB – August 11, 2020, 03:43:11 pm

Radiator Cap Function and Operation

Thanks Steve, if the vacuum valve were to stick closed it could cause the problem. Learn something new all the time

Re: collapsed coolant hose

Reply #15 – August 11, 2020, 06:25:55 pm

Quote from: craneman – August 11, 2020, 04:19:57 pm

Thanks Steve, if the vacuum valve were to stick closed it could cause the problem. Learn something new all the time

Yes, thanks Steve. However, you could have warned us that there would be a test at the end.

Re: collapsed coolant hose

Reply #16 – August 11, 2020, 06:52:11 pm

Quote from: Jan & Richard – August 11, 2020, 06:25:55 pm

Yes, thanks Steve. However, you could have warned us that there would be a test at the end.

I aced it!

Re: collapsed coolant hose

Reply #17 – August 11, 2020, 06:55:33 pm

Quote from: craneman – August 11, 2020, 06:52:11 pm

I aced it!

WAIT-- can I have a glass of wine and still take the test?

Re: collapsed coolant hose

Reply #18 – August 11, 2020, 07:39:28 pm

Thanks everyone
As I started to takeoff the radiator cap I could hear the air rushing inside.
I looked down at the hose and it regained its shape.
I don't see any markings on the cap , will replace if it happens again

Re: collapsed coolant hose

Reply #19 – August 11, 2020, 08:18:28 pm

In looking at the picture on the right where it goes out of view. Does the hose look swollen

Re: collapsed coolant hose

Reply #20 – August 11, 2020, 08:54:02 pm

Dang, really shouldnt say this but some of us learn the hard way and have the scars to prove it while others take tests and hang stuff on the wall. A few on here have done both. (Maybe more than a few)

Yes, a glass of wine is well deserved!

Re: collapsed coolant hose

Reply #21 – August 12, 2020, 12:05:21 am

Frank you have proven your cap is stuck closed because you heard and saw the air going back in. Replace the cap. It will never allow overflow coolant to be drawn back into a cooling engine. You may be able to clean but this is a good time to replace. Like everthing they get old.
Scott

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