EXPANSION TANK OVER FLOWING
#1
11-04-2007 | 05:48 AM
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#2
11-04-2007 | 05:52 AM
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RE: EXPANSION TANK OVER FLOWING
What is the coolant level in the expansion tank when the car is cold? It has to be between min and max. Maybe you overfilled it?
When was the last time you changed the ECT (engine coolant temperature) sensor. Maybe the reading is not correct.
What about the thermostat? When was it last changed?
#3
11-04-2007 | 06:18 AM
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RE: EXPANSION TANK OVER FLOWING
i keep the coolant level right at the max level, 2days ago the light (low coolant) turned on and when i checked it was almost empty?
i get steam coming out from expansion /hot coolant gushing out of expansion tank.
i bought the car about 3 to 4 month ago, so i have no idea when it was changed, the coolant looks very dirty though, its brown...
i dont know anything about the ECT or the thermostat
how can i check them [X(]
i get steam coming out from expansion /hot coolant gushing out of expansion tank.
i bought the car about 3 to 4 month ago, so i have no idea when it was changed, the coolant looks very dirty though, its brown...
i dont know anything about the ECT or the thermostat
how can i check them [X(]
#4
11-04-2007 | 06:29 AM
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RE: EXPANSION TANK OVER FLOWING
The thermostat is so cheap it is not even worth checking. Just go ahead and buy a new one and install it.
http://www.fcpgroton.com/volvo850cooling.htm#therm
The 87 degree thermostat is for turbos, the 90C one is for non-turbos.
Is the coolant brown or is the coolant expansion tank brown? The tanks get pretty dirty.
You might have a blown head gasket if you have oil in the coolant. That would explain the missing coolant too. You could also have a leaking radiator or a bad hose.
http://www.fcpgroton.com/volvo850cooling.htm#therm
The 87 degree thermostat is for turbos, the 90C one is for non-turbos.
Is the coolant brown or is the coolant expansion tank brown? The tanks get pretty dirty.
You might have a blown head gasket if you have oil in the coolant. That would explain the missing coolant too. You could also have a leaking radiator or a bad hose.
#5
11-04-2007 | 06:36 AM
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RE: EXPANSION TANK OVER FLOWING
i just checked the expansion tank, the coolant is grey, it is silver color liquid.
i have had the hoses replaced recently and i dont see any leaks on the driveway at all, its just the expansion tank leaking/ squirting hot coolant.
what do u think?!
where do i place the thermostat or how do i chnage the head gasket.
i have had the hoses replaced recently and i dont see any leaks on the driveway at all, its just the expansion tank leaking/ squirting hot coolant.
what do u think?!
where do i place the thermostat or how do i chnage the head gasket.
#6
11-04-2007 | 06:43 AM
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RE: EXPANSION TANK OVER FLOWING
Usually coolant is either yellow, green or blue. I have never seen silver coolant. Maybe it is dirt ir oil.
The 850 has a closed cooling system. The coolant expansion tank is there to make room for the coolant to expand when the temps go up. The system has to be closed tight to contain the pressure.
If there is a crack in the expansion tank or a bad expansion tank cap you will eventually lose all your coolant and bye bye engine.
You can get a new expansion tank here: http://www.fcpgroton.com/volvo850cooling.htm#radiators
The 850 has a closed cooling system. The coolant expansion tank is there to make room for the coolant to expand when the temps go up. The system has to be closed tight to contain the pressure.
If there is a crack in the expansion tank or a bad expansion tank cap you will eventually lose all your coolant and bye bye engine.
You can get a new expansion tank here: http://www.fcpgroton.com/volvo850cooling.htm#radiators
#7
11-04-2007 | 06:46 AM
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RE: EXPANSION TANK OVER FLOWING
One more thing, if you open the expansion tank cap after using the car and reaching normal operating temperature, it is normal for a lot of coolant to be spit out. That´s just how it works.
Be extra careful with hot coolant. It is pressurized and when you remove the expansion cap it can jump a couple of feet. It will burn you really bad. It might even scar your face.
Be extra careful with hot coolant. It is pressurized and when you remove the expansion cap it can jump a couple of feet. It will burn you really bad. It might even scar your face.
#8
11-04-2007 | 06:48 AM
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RE: EXPANSION TANK OVER FLOWING
i prob. have to change the coolant and see how it goes.
all i know that dealer where i bought the car from changed the radiator...
what i dont underestand is why it gushes coolant from expansion tank? you think it needs a pressure testing?
i also have a bit of whit -ish resedue in the expansion tank-
all i know that dealer where i bought the car from changed the radiator...
what i dont underestand is why it gushes coolant from expansion tank? you think it needs a pressure testing?
i also have a bit of whit -ish resedue in the expansion tank-
#10
11-04-2007 | 06:53 AM
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RE: EXPANSION TANK OVER FLOWING
ORIGINAL: axelm
One more thing, if you open the expansion tank cap after using the car and reaching normal operating temperature, it is normal for a lot of coolant to be spit out. That´s just how it works.
Be extra careful with hot coolant. It can easily burn your face and body and scar you forever.
One more thing, if you open the expansion tank cap after using the car and reaching normal operating temperature, it is normal for a lot of coolant to be spit out. That´s just how it works.
Be extra careful with hot coolant. It can easily burn your face and body and scar you forever.
#13
11-04-2007 | 08:12 AM
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From: South Bend Indiana
RE: EXPANSION TANK OVER FLOWING
This may or may not be related but here it goes. I recently purchased an 850 t a few months ago and noticed strange activity in the expansion tank. It would heat up and begin to overflow. I had never added coolant to it but always got fuller and fuller as if the car was producing its own fluid, only it did have a gray-ish tint to it. I looked inside the tank and noticed a gray-ish, white substance on the bottom so I tried to vacuum it out but it was rock solid. I took the expansion tank off and found out someone had used two different types of stop-leak in it and it was clogged up all the way to the engine through the hoses, (how I never overheated is beyond me) Anyway, I reamed out my hoses and tank-a with a hand auger for sinks and the fluid became VERY grey!! So I flushed, filled and all is well.
I guess to make a long story short, Check for any signs of stop-leak in your system. It can clog more than the hole it's intended to clog and cause miscoloration.
I guess to make a long story short, Check for any signs of stop-leak in your system. It can clog more than the hole it's intended to clog and cause miscoloration.
#14
11-04-2007 | 08:35 AM
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#16
11-04-2007 | 08:42 AM
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RE: EXPANSION TANK OVER FLOWING
ORIGINAL: gooproduct
This may or may not be related but here it goes. I recently purchased an 850 t a few months ago and noticed strange activity in the expansion tank. It would heat up and begin to overflow. I had never added coolant to it but always got fuller and fuller as if the car was producing its own fluid, only it did have a gray-ish tint to it. I looked inside the tank and noticed a gray-ish, white substance on the bottom so I tried to vacuum it out but it was rock solid. I took the expansion tank off and found out someone had used two different types of stop-leak in it and it was clogged up all the way to the engine through the hoses, (how I never overheated is beyond me) Anyway, I reamed out my hoses and tank-a with a hand auger for sinks and the fluid became VERY grey!! So I flushed, filled and all is well.
I guess to make a long story short, Check for any signs of stop-leak in your system. It can clog more than the hole it's intended to clog and cause miscoloration.
This may or may not be related but here it goes. I recently purchased an 850 t a few months ago and noticed strange activity in the expansion tank. It would heat up and begin to overflow. I had never added coolant to it but always got fuller and fuller as if the car was producing its own fluid, only it did have a gray-ish tint to it. I looked inside the tank and noticed a gray-ish, white substance on the bottom so I tried to vacuum it out but it was rock solid. I took the expansion tank off and found out someone had used two different types of stop-leak in it and it was clogged up all the way to the engine through the hoses, (how I never overheated is beyond me) Anyway, I reamed out my hoses and tank-a with a hand auger for sinks and the fluid became VERY grey!! So I flushed, filled and all is well.
I guess to make a long story short, Check for any signs of stop-leak in your system. It can clog more than the hole it's intended to clog and cause miscoloration.
its whitish grey.... it could be that...]
so u recommend that i should clean and rinse the expansion tank and hoses??! and refill my coolant?
#17
11-04-2007 | 08:47 AM
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RE: EXPANSION TANK OVER FLOWING
ORIGINAL: AlX
yeah, i turn it as much as i can, but at the end trun it gets loose again,,,
yeah, i turn it as much as i can, but at the end trun it gets loose again,,,
http://www.fcpgroton.com/volvo850cooling.htm#radiators
#20
11-04-2007 | 09:23 AM
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From: Columbus, OH
RE: EXPANSION TANK OVER FLOWING
There is a small hose that comes out of the top of the expansion tank. That hose goes to the housing where the thermostat and temp sensor is located. I would change the expansion tank, cap, themostat and temp sensor then flush and refill with new coolant. The thermostat is right behind the power steering pump and kind of a pain to get to, but not real bad. I believe the thermostat housing is held on with torx screws that kind of a pain also. I replaced mine with regular hex bolts when I did my thermostat. Careful not to strip those torx bolts. Get a decent set of torx bits and use the right size.