Question about 2000 Ford Focus
From your brief description it appears you have an air lock or maybe head gasket issues.
I presume/hope that recently you have had something to do with the coolant (Rad change or Thermostat) or maybe let water out to add anti freeze? what is needed is a system bleed.
O.k. when engine cool remove header tank cap (Where you add coolant) have the car on level ground start it up and leave it to idle, have plenty of very warm water available. Hopefully after the engine has reached operating temperature a bubbling and boil over will briefly occur. (Make sure you are well away from Coolant filler) top up the system with the very warm water, wait a good few minutes or more as it will possibly gurgle over again. If after a good while it stops then replace cap and hopefully problem sorted.
If the fault persists you may need to repeat process, If when you are doing this operation the water boils over profusely and a lot of air bubbles are seen all the time when warm the Head gasket may have fractured between cylinders pushing gases into the cooling system causing the air lock and overheating.
Final checks! Is the oil on the dipstick Creamy/Coffee coloured? Has the oil filler got gungy creamy gloppy stuff all over it? Is there oil in the coolant? From the exhaust pipe is there a considerable amount of Water dripping when engine running? and finally do the hoses go very hard become pressurised?
The above point toward Cylinder Head or Gasket failure.
Last thing, could the water pump be faulty? is there any coolant driping from behind it?
Sorry for the Epic!
Hope this helps?
Posted on Jan 07, 2009
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