saigonij
|
posted on 31/5/05 at 07:21 AM |
|
|
Collapsed Heater Hoses
All,
Building a Velocity and we drained the coolant system down to fit an in-line probe type thermo-switch for the fan ( brought from kit car solutions
).
Once everything was filled up again, we ran the car up to temperuature to set the fan switch. One thing we noticed was that once up to 100 on the
gauge ( a bit high i know ) the hoses started to collapse.
The hose from the rad to the water pump collapsed, and so did the hose out of the thermostat.
These are all brand new hoses. Engine is a Zetec. Rad is an Escort MKII rad.
Any ideas?
|
|
|
theconrodkid
|
posted on 31/5/05 at 08:18 AM |
|
|
is this as the engine cooled down?if so its the water contracting and causing a vacume,if not looks like too much pressure or dodgy hoses
who cares who wins
pass the pork pies
|
|
bob
|
posted on 31/5/05 at 08:24 AM |
|
|
I know thw 2 litre zetec needs an 1800 water pump to work properly,not sure if this would cause the problem if still using a 2 litre pump though cos
its going the wrong way.
|
|
saigonij
|
posted on 31/5/05 at 09:37 AM |
|
|
nope. its a 1.8 with the 1.8 water pump.
they collapsed while the engine was running, and expanded again once we took the rad cap off.
could this be a naff cap?
|
|
theconrodkid
|
posted on 31/5/05 at 09:53 AM |
|
|
weird try it again and see if the same happens,could have been an air lock.
also run it up without the cap on,does the water dissapear?have you got a cap on the rad and an expansion tank?.
if so put a plain cap on the rad with overflow going to the expansion tank
who cares who wins
pass the pork pies
|
|
DarrenW
|
posted on 31/5/05 at 10:25 AM |
|
|
Did it do that before you fitted the thermostat unit??
Very strange. It sounds like the pump is drawing the water but there is a blockage from the rad (ie no water flowing into the pipe). Cant think why
that would happen tho unless the thermostat is causing a constriction and limiting the flow. Maybe this is why the temp is so high - not enough
flow.
Have you tried loosening the cap when the pipes are being sucked in - of course be VERY careful - hot water and pressure etc. (Disclaimer time - I
take no responsibility for scalding / personal damage howsoever caused etc etc).
Im not sure if the pump is supposed to be sucking from the rad or pushing water into the rad?? If all was well before fitting the sensor then this is
where i would commence investigation.
|
|
Mix
|
posted on 31/5/05 at 10:43 AM |
|
|
Water Pumps
Not sure if this is relevant to the problem but as I understand it the water pump needs to be from an Escort configured Zetec. A 1.8 Modeo pump will
be rotating the wrong way.
Easy way to tell which type you have, the inlet/outlet? pipe is at 90 degtees to the cranckshaft centre line if it's an Escort one, inclined
towards the rear if a Mondeo one.
Mick
|
|
saigonij
|
posted on 31/5/05 at 11:52 AM |
|
|
all seemed well until we had to take the bottom hose off to fit the tempswitch probe. Does it sound like an air lock?
|
|
bob
|
posted on 31/5/05 at 03:26 PM |
|
|
I t must be a massive air lock,i run mine with cap off the header tank and fill as it heats.
|
|