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Originally Posted by JapaneseAutox
i'm a bit puzzled on this, hopefully someone can help me out. i'm not leaking anywhere (or at least i hope not, been pressure testing the cooling system and it holds fine). my reservoir tank fills up when the engine is hot, and when the engine cools down, it stays filled up. i thought it was the radiator cap but i'm using a brand new cap and it still does it. when you look inside the radiator the top is empty (the missing coolant in the reservoir tank). umm.. help?
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For those of you who don't understand how the cooling system works, click on the attached link:
http://auto.howstuffworks.com/cooling-system.htm
The usual cooling system problems I've seen, (what year is your car again??), are usually due to 1). Clogged radiator...when was the last time you serviced it - that is had it drained & filled with new coolant? Ever had the radiator chemically flushed?? 2). Stuck thermostat - not allowing your coolant to properly circulate in your engine, 3). Bad water pump - usually you'll see water dripping from a weep hole underneath the pump. And 4). air pocket in the coling system - you didn't properly bleed all the air out of the cooling system when you refilled it with coolant. KA motors are notorious for this. All four will usually cause your coolant temperature gauge on your dash to rise towards the "H" mark on your gauge - seen that happen lately??
Anyhow, these are usually my experiences when working on KA powered S13's & S14's. Let me guess...you've got an SR under the hood?? hehehe..
ID