Weeping hoses

ChrisJC · Post by **ChrisJC** » Sat Sep 20, 2014 7:43 pm

On my Rangie, I have a few hoses which appear to be weeping along the cotton reinforcing fibres and out of the end:

The smaller hose is a pre-formed 90degree bend from CBS, the larger one is an aftermarket top radiator hose.

Not much is leaking, but I'd prefer it if they were not leaking at all.

Anybody know why this happens?, and where I can get hoses that guarantee this won't happen to.

Chris.

mgbv8 · Post by **mgbv8** » Sat Sep 20, 2014 10:38 pm

That looks like anti freeze seeping out of the support cords mate. The only way that this can happen is if the inner side of the hose is compromised and not fully water tight. I'm guessing that the hoses may have been pinched a bit too tight with the clips which has fractured the inner lining. The fractures are so small that water will not get through, but the smaller anti freeze molecules will ? I never had a leak on my system until I removed water all together and went with dehydrated glycol, ie Evans waterless coolant. I had to replace the water pump gasket as it was seeping red goo in many places when the new coolant went in ?

ChrisJC · Post by **ChrisJC** » Sun Sep 21, 2014 11:13 am

I wondered about fracturing the inner lining, but the top rad hose uses the OEM spring clip, so it's never been overtightened.

I wondered if this is a common occurrence.

Chris.

mgbv8 · Post by **mgbv8** » Sun Sep 21, 2014 6:53 pm

The support cords in the hose must be in contact with the antifreeze at some point inside the hoses Chris. If the system was water only you may not notice it. But the colour and residue of the antifreeze is showing itself as the water evaporates from the mix when it meets the outside air ? Hence the sticky looking residue. It only need to be a tiny cut in the hose for the fluid to come into contact with just one of the support braids in the hose. The braids all cross each other so I guess the wick effect takes over and all of them get soaked eventually ? Pel

ChrisJC · Post by **ChrisJC** » Sun Sep 21, 2014 7:55 pm

Agreed with your thinking. It just seems odd to me that it is happening to quite a few hoses (all non OEM). I'd like to replace the hoses with ones that don't do this, but how can I be sure I'm not putting good money after bad.

Or can too much anti-freeze attack the rubber?

Chris.