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Location:
melbourne
Registered:
January 2003
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Location:
Adelaide
Registered:
May 2002
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Re: 4AC blown head gasket?
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Thu, 23 January 2003 22:53
 
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Bubbles in the water is a classic sign on a head gasket death. Xhexk the oil as well and see if there is any water sitting on top of the oil in the sump. You might only have a leak between a cylinder and the water jacket. You would get these bubbles with water or coolant.
I've had a similar thing where i couldnt get a definate leak useing a preasure tester, but when i pulled the head off the head gasket had gone, but it was a very small leak.
A few things to check beffore whiping the head off:
- hoses. are they old and dying?
- thermostat housing, no leaks?
- leaks around the water pump
- radiator cap. This may also explaine whay it isnt pulling coolant back from the over flow bottle. (a new radiator cap and do wonders sometimes)
also, put your hand behind the exhaust and see if it gets wet quickly. This would be a good sige that water is betting pulled through the combustion chambers.
The head gasket is easy to change, I've done it in a day by myself, but the head and block didnt require any work.
Oh, and only use water to test for a leak after say putting a radiator or water pump back in. Run coolant! Running stright water for a long time will do 'bad things'(tm). Also, coolant has a higher boiling point, so is able to do its job to a higher temp.
Good luck!
Craig.
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Location:
melbourne
Registered:
January 2003
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Re: 4AC blown head gasket?
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Fri, 24 January 2003 13:19
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The strange thing is no water comes out exhaust and theres definately no water in the oil :/
Would it be just boiling causing the bubbles? without a cap on theres less pressure could that cause this?
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Location:
Sydney, Australia
Registered:
May 2002
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Re: 4AC blown head gasket?
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Sun, 26 January 2003 17:23
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Hi,
THe water in my radiator bubbles when the thermostat opens, and this is a new 4AGE so I'm pretty sure the head gasket is still ok (hopefully!  ).
Is that the only sign you have? ie no oil in water, or water in oil? Maybe your radiator's blocked and needs a good flushing or something...
rgrds
sam
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