Coolant\Pressure Problem

TheSly1 · 10-07-2011, 05:40 PM

So working on my sisters EF Falcon

Having an issue where its loosing allot of water and wanted some onpinions on what the problem might be...

So when i go to bleed the cooling system after doing a coolant flush, what happens is it goes to bleed ok, and get the occasional bubble after its warming up.. which i would think is quite normal...

But after its almost warm it gushes out where the radiator cap is seriously gushes, so i turn it off becuase it wont stop gushing it has released a heap of coolant out and takens a bit to fill it back up

really not sure what the problem is here... any thoughts???

one recent changes are the heater tap was changed but simple and shouldnt be the culprit...

at a loss...

thanks in advance....

Ford Falcon XR6 · 10-07-2011, 06:09 PM

Does it gush out with the cap on and off if it does what the cap on check the seals on the cap if not it sounds like you could have a head gasket problem

TheSly1 · 10-07-2011, 07:20 PM

yes with the cap off.. ill go check with the cap on (suspect this is where the litres of coolant is going when it gets driven)

any other thoughts..

TheSly1 · 10-07-2011, 08:14 PM

ok update, so ran the car with radiator cap on, upto operating temp...

nothing came out the overflow, BUT the top radiator hose i noticed had allot of pressure behind it.. like it was allot harder than say my AU top hose to squeeze..

any thoughts on that?

**Stav** · 10-07-2011, 08:27 PM

Jammed thermostat?

TheSly1 · 10-07-2011, 08:33 PM

Thanks Mate, Appreciate the thought...

I will look into this, any other thoughts?

Quote:

Originally Posted by Stav

Jammed thermostat?

**Stav** · 10-07-2011, 08:44 PM

Coolant pressure test.I have the tester and it will show leaks.

TheSly1 · 12-07-2011, 09:12 AM

update...

so definatly coming out overflow hose past radiator cap (cap is brand new).. so excess pressure in the system..

stav says maybe blocked thermostate? (changing that tomorrow nite)

what can other problems be definatly HG?

peterban · 12-07-2011, 11:30 AM

My AU did a similar thing after changing the heater tap and buying a new cap.
The auto stores have 2 different caps for AU, a recovery one and a non recovery one.
I notice that you say it is an EF so not sure whether the same situation happens with the EF caps.
Make sure yours is the non recovery one.
Might get some answers in the E series section
Good luck

TheSly1 · 12-07-2011, 11:34 AM

Thanks mate, the cap i just replaced it with is a non-recovery type, its a cpc (might be the brand name) in the book it didnt have a recovery type cap part number.. (which makes sense as there is no place to recover the coolant from..)

thinking stav was correct with blocked\jammed thermostat and ill change that tomorrow nite..

cheers guys

Quote:

Originally Posted by peterban

My AU did a similar thing after changing the heater tap and buying a new cap.
The auto stores have 2 different caps for AU, a recovery one and a non recovery one.
I notice that you say it is an EF so not sure whether the same situation happens with the EF caps.
Make sure yours is the non recovery one.
Might get some answers in the E series section
Good luck