[s-cars] High coolant pressure and heater valve

[Vincent Frégeac]

That's what surprise me. It's not to high a pressure, the kind you can hold
with your thumb on bicycle pump. How can it make a hose pop out when it's
holding on a 3/4 inch tube with a tight collar. Am I right to suspect a much
higher pressure in my coolant system?



Vincent. 

-----Message d'origine-----
De : Joshua van Tol [mailto:josh at spiny.com] 
Envoyé : 16 janvier 2006 19:53
À : Vincent Frégeac
Objet : Re: [s-cars] High coolant pressure and heater valve

10-15 psi is pretty standard for automotive cooling systems.
On Jan 16, 2006, at 4:15 PM, Vincent Frégeac wrote:

> Hi all,
>
> The coolant hose popped out a second time at the heater valve.  
> Looking at it
> closely, I've seen a quarter inch of the heater valve tube has broken 
> and is sitting inside the hose. So a new heater valve is coming.
>
> But I still have a concern. There is a 3/4 inch of plastic tube left 
> on the heater valve and when I reinstalled the hose the first time, I 
> pushed it all the way to the valve body and tightened the collar 
> really hard. So, to pop the hose out a second time, it required a 
> fairly high pressure in the coolant system. Anyone have have a rough 
> figure of the "normal"
> pressure in
> the coolant system when the engine is hot and running at a good speed? 
> Both time, the hose popped out after half an hour on the highway at 
> 75mph (It's a legal speed here, or almost, I would say it's officialy 
> tolerated).
>
> As always, thanks for your help.
>
>
>
> Vincent.
>
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