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3.8 Coolant Flow

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Old 11-16-2005, 01:09 PM
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absolutdavis
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Default 3.8 Coolant Flow

We know the belt is on right and the impeller on the water pump is correct. 99% sure the intake gasket are put on correct. The problem is that the coolant is not circulating, and what is is filling the puke tank over capacity. When I intially start the engine without the radiator cap on, it spews out the top neck of radiotor. I have tried to run without the thermostat and the problem still occurs. What is the problem?!?!?
P.S. COMPLETELY rebuilt motor and new radiator
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Old 11-16-2005, 01:11 PM
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Tim37
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Default RE: 3.8 Coolant Flow

are the head gaskets on right?
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Old 11-16-2005, 01:17 PM
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absolutdavis
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Default RE: 3.8 Coolant Flow

wouldn't bet my life on it, but pretty darn sure
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Old 11-16-2005, 01:45 PM
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03YellowPony
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Default RE: 3.8 Coolant Flow

In one shop I ran, we replaced a water pump on a car. It continued over heating. We did everything..Burped the system several times, replaced the t-stat.. couldn't figure it out. Then I told the tech to take the pump off. I looked at it, and it turns out the impeller wasn't attached to the shaft correctly. Turn the shaft, and the impeller just sat there, Might have the same situation with yours.
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Old 11-16-2005, 01:54 PM
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absolutdavis
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Default RE: 3.8 Coolant Flow

nope, shaft and impeller are turning right. just checked it.
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Old 11-16-2005, 03:19 PM
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Derf00
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Default RE: 3.8 Coolant Flow


ORIGINAL: absolutdavis

We know the belt is on right and the impeller on the water pump is correct. 99% sure the intake gasket are put on correct. The problem is that the coolant is not circulating, and what is is filling the puke tank over capacity. When I intially start the engine without the radiator cap on, it spews out the top neck of radiotor. I have tried to run without the thermostat and the problem still occurs. What is the problem?!?!?
P.S. COMPLETELY rebuilt motor and new radiator
If it's over filling the overflow tank then you have flow, it just sounds like it's in reverse. Are you sure the WP is spinning in the right direction? I believe for 99+ it should be counter-clockwise with the engine running. (belt should run under the pulley)
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Old 11-16-2005, 06:24 PM
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absolutdavis
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Default RE: 3.8 Coolant Flow

its' a 1994 and it's running clockwise
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Old 11-16-2005, 07:31 PM
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Derf00
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Default RE: 3.8 Coolant Flow

http://www.autozone.com/servlet/UiBr...3d801da4de.jsp

Actually my 2000 runs clockwise as well. I had it wrong in my head. Don't know then...I'm stumped. Is the car overheating?
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Old 11-16-2005, 07:48 PM
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03YellowPony
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Default RE: 3.8 Coolant Flow

This is indeed strange. There can only be 3 possibilities.
1 Waterpump going wrong way. You have checked this and ruled it out
2 Stuck T-stat. I know you said you replaced it, but it can be defective. take it out and put it in boiling water. Check to see if it opens.
3 Clogged water passages. This would have to be a MAJOR clog. Not sure how you would check this one.
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Old 11-16-2005, 08:22 PM
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absolutdavis
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Default RE: 3.8 Coolant Flow

yes, it's been overheating
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