Question about 1985 Toyota 4Runner

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85 Toy 4Runner coolant loss problem

My 85 toy 4runner 4wd is having problem of blowing out the coolant through the small hose that run from next to the radiator cap to the small coolant tank. I replaced a new thermostat, new radiator cap and a new radiator about 1 week ago. The water pump is about 8 months old. Still give me same problem everyday after that.
Whate else can be the faulty of this coolant loss?

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Is the toyota running hot or do you just notice it blowing coolant out of that hose into the reservoir ????

Posted on Dec 24, 2008

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Check water pump or may even be bad head gasket as a last resort

Posted on Dec 16, 2008

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Is the water circulating?

Posted on Dec 16, 2008

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Sure sounds like a blown head gasket...look for milky brown gu under the oil cap and occasional water out the tail pipe, lag on starting

Posted on Dec 16, 2008

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Sound like you need to change your t-stat (thermostat) sounds like its stuck shut.

Posted on Dec 16, 2008

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Well , I am leaning toward your head gasket going.
What is happening is the coolant system (all new I see) is pressurising to the point of blowby .

My recomendation is to NOT put the cap on all the way (ie; 1/2 a turn loose) to allow the pressure to escape w/o exhausting the coolant in the process.

Posted on Dec 16, 2008

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First Check if coolant level is proper, The small hose is used to allow the OVER FLOW to exit system.

1. Is the vehicle overheating? or is there a small amount of fluid being discharged from the hose. When the coolant gets hot it expands.

2. If the fluid creates a loss large enoughto allow overheating, then I would look for a blockage in the coolant system. Keep me post with your progress.

Posted on Dec 16, 2008

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Head gasket

Posted on Dec 16, 2008

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