[DML] Re: Collapsing Heater Core Return Line

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

The water pump doesn't create a "suction". It can only create a
pressure differential. When the system gets hot the ENTIRE system is
above atmospheric pressure. The suction side of the pump has a lower
pressure than the output side so the coolant circulates from the
region of higher pressure to the region of lower pressure. In fact
under certain conditions the suction hose to the pump can collapse so
on many cars there is a spring inside to prevent that. Not too likely
to happen on the heater hoses, they are smaller and stiffer.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> wrote:
> What about the 2' long piece on the front side? Would it not collapse
> (if that were the problem)? Pump doesn't create any real suction anyway.
> 





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