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Guest Message by DevFuse

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help please with a very strange over heating problem

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11 replies to this topic

#1 tailgatewagon


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Posted 11 November 2003 - 08:15 PM

ok the facts.

fresh re seal on the motor.
no leaks oil or water

dosnt use any water

it runs hot 3/4 temp on the freeway at -10 degrees F

runs up to almost the red if i slow down(ie stop an go trafic).

here is the funny thing new thermostate that is opening.
radiator hose on thermo side is 95 degerees 85 on water pump side. thermostat housing is 200 degrees. and raditor is cold.

anyone have any ideas could the radiator be pluged therefore not alowing enough flow? but then why is the raditor and rad hoses so cold like the fluid isnt worm?

#2 trooperjeep


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Posted 11 November 2003 - 08:25 PM

Perhaps the water jacket on the motor got plugged when the block was re-sealed?

I'm not sure if you can flush this out, but you can call you local radiator shop and see if they have a way to pressure flush a radiator system in the car.

I know the instant oil change places do a radiator flush, but it's typically low pressure (about 4psi)


#3 Nug


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Posted 11 November 2003 - 08:44 PM

The rad could be plugged. With water having no where to go, I could see both hoses getting hot.

Or maybe (rare) the impeller fell off the water pump.

#4 tailgatewagon


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Posted 11 November 2003 - 08:54 PM

see thats the funny thing the hoses are cold 95 degerees is 100 less then im used to seeing. i guess the water jacket could be pluged hum that would suck.

#5 torxxx


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Posted 11 November 2003 - 09:21 PM

change your thermostat

#6 trooperjeep


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Posted 11 November 2003 - 09:30 PM

You might be able to build an adaptor from to flush it yourself.

Your local home improvement or hardware store should have fittings, hose clamps, etc that you can piece together to adapt it to a garden hose.

Remove the thermostat, then disconnect radiator hoses on both sides to flush just the engine's water jacket.




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Posted 11 November 2003 - 09:34 PM

They do have a power flush for the cooling system. I saw it at my local nissan dealer when I had my Maxima.

#8 desertshopper


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Posted 16 November 2003 - 11:36 PM

I had same problem with my ea 81 85 gl I replaced the radiator and thermostat and now no problem.
Good Luck

#9 Meeky Moose

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Posted 17 November 2003 - 06:50 AM

my hatch was doin that same thing after the new water pump and thermostat..

so i replaced the thermostat again, and fixed the problem.. i thinks you got a bum thermostat..

#10 Cougar


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Posted 17 November 2003 - 12:07 PM

I have to agree with the the others. I would try swapping the thermostat with an OEM Subaru unit if it isn't one already and also replace the radiator especially if it is the original one. They do get clogged after time.

#11 riverrat


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Posted 17 November 2003 - 01:10 PM

I ran into a similiar scenerio with an ea81 wagon.I took it to a mechanic, he went straight for the radiator core with his hand.While everything aroundit was HOT the core was cold.Plugged from age.Replaced it solved the problem.I had already ruled out the thermostat and water pump though.Would run hotter onthe free way then in town though.

#12 MilesFox


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Posted 17 November 2003 - 06:59 PM

if you have an air bubble flaoting around in the thermostat housing, the thermostat will never warm up to opening.

check the fluid level while idling, and squeeze the top radiator hose. that would be the first thing to start with.

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