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Old 02-08-2012, 08:35 AM   #1
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coolant issues and over heating

well first to start off my 02 svt blew the heater core hose going to the oil cooler all the water came out didnt know. car didnt read that it was over heating. ok so long story short blew my head gasket and warped my head . so i replaced the hose, themastat housing(as in it had a small leak ), replaced water pump,water temp sensor and new gasket set and got head back from machine shop . got it all together runs greats but fans do not kick on and car starts to over heat but doesnt read that it is and my heat doesnt work, and cooling system not building pressure or moving water . i do know a bit on rebuilding a motor and what not but im lost to why its doin this


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Old 02-08-2012, 08:42 AM   #2
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The impeller on the water pump is plastic, it could have melted, seeing water circulation is tough, but you replaced the pump... New thermostat too? How are you seeing that its starting to overheat? Another possibility is that the bleed off lines, two small ones going to the coolant tank are plugged, blast them from the tank back with compressed air. during the overheat some scale could have plugged them. with all the fancy sensors, the car should see a sudden drop in indicated temperature as coolant loss and throw a warning light.
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Old 02-08-2012, 08:50 AM   #3
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Pressure or vacuum test the cooling system. Has it ever expelled coolant since you did the work? You could just have an air bubble somewhere. Try to locate a vacuum-filler like a RadKit
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Old 02-08-2012, 09:09 AM   #4
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ok well i filled it up with water, first just so i wouldnt waste coolant if i had to take anything off , and when i start the car the water level never drops and my heater hose's are cool are the other hose are burning hot and when i shut the car off the water boils out
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Old 02-08-2012, 10:31 AM   #5
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Hmmm, when you filled it, did the two little hoses burp? yeah, hmm, no heater hose heat is wrong, perhaps wrong path through the oil cooler?
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Old 02-08-2012, 11:24 AM   #6
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The cooling system needs to be "burped". There is an air bubble in the system. If the radiator has a cap, remove it when safe (cool). Start the car and let the engine run til the t-stat opens and allows the water to flow. This should take care of the issue. If theis does not work a vacuum bleed may be needed.

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Old 02-08-2012, 11:35 AM   #7
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True enough, yeah, mine does self-bleed on cold coolant refill, those two hoses sputtering away as the coolant is poured in followed by a slow steady flow as its running. If those small hoses are blocked, bad things could happen.
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Old 02-08-2012, 12:03 PM   #8
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ill blow all the hoses out then check back in
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Old 02-08-2012, 09:29 PM   #9
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So good news car is back together and running way better than before , so I end spending like $250 , replacing all the upper gaskets , heater cord hose (which cause the problem ), therastat housing that melted under the heat, water pump which started to leak(which most do if you overheat your mOtor) , fan resistor (which melted from the hot coolant spraying from the therastat housing) . And cut my bump stop like an inch which lowered the car more :/ but made it ride a 100x better , cause it no longer sits on them and now rides on the springs which I will raise a lil to make the ride better
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Old 02-08-2012, 10:00 PM   #10
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success.
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