Scoobythedog
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| posted on 9/4/09 at 09:59 PM |
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Zetec 2 litre overheating
I'm using a 2 litre mondeo zetec, (2001) plumbed it all up to the radiator, It runs ok to start, then as it builds up presure its dumping out
loads of water out of the expansion tank overflow. It then needs bleeding again as air appears in the radiator. Naturally this is making it run
hot.
What have I missed ? as everything seems to be connected right ?
Any ideas or help appreciated.
Scooby.
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mangogrooveworkshop
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| posted on 9/4/09 at 10:05 PM |
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do you have the water pump going in the right direction.
Do a search on this subject
http://www.emeng.gentlyhosting.co.uk/Cooling/Part1.htm
[Edited on 9-4-09 by mangogrooveworkshop]
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coozer
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| posted on 9/4/09 at 10:12 PM |
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Have you plumbed the bypass pipe into the bottom hose close to the water pump (going in the right direction?) and the hose from the header going down
to bottom hose but separate?
Expansion tank should be plumbed into the top of the Ford thermostat
Blacktop or silvertop? As said is the water pump going the right way?
1972 V8 Jago
1980 Z750
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Scoobythedog
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| posted on 9/4/09 at 10:33 PM |
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The Green arrows run to and from the radiator sat at the front of the car.
The red with the square is blanked off, and the red arrow goes to the expansion tank.
Any suggestions
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zetec
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| posted on 9/4/09 at 11:18 PM |
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Red with blocked end needs to go to a "T" in the bottom hose so there is bypass during warm up. The red arrow head on my car connects with
the feed from the expansion tank (with a 15 psi rad cap) also goes to a "T" in the bottom hose. The Ford thermostat has a bypass flow
during warm up to stop hot spots in the head until the thermostat opens and normal flow starts. The pressure in the system is quite high and blows
past lower psi rad caps ie. Rover.
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Scoobythedog
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| posted on 10/4/09 at 12:05 AM |
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Do you mean like this, does it make any difference if its A or B ?
Will this mean the excess water is pumped back into the radiatior at the front and not out of the expansion tank ?
I'm using the mondeo tank, with its original cap, what stops the water coming out the overflow pipe ?
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zetec
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| posted on 10/4/09 at 05:50 AM |
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"B" but both small pipes go back to bottom hose between the rad and water pump.
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paulf
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| posted on 10/4/09 at 06:11 PM |
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You dont actually need to connect the pipe on the drivers side of the thermostat housing.It is the heater feed in the Mondeo.Mine is plumbed in using
the left hand outlet to water pump inlet and the header tank is teed into it, the thermostat small outlet at the top is also connected to the top of
the header tank.
Paul
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