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Engine Overheating

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Old 02-26-2009, 08:34 PM
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my engine is overheating after replacing the water pump , replacing coolant hoses, refilling the radiator fluid (through the radiator cap) resevoir is good. the coolant temperature idles fine, until the gas pedal is depressed then it rises all the way to red line, makes no attempt to circulate coolant

tried: draining a little radiator fluid from the petcock at the bottom of the radiator , wiggled coolant temp sensor , checked water pump for leaks which arent there.

suggestions guys? im in a tough spot here

could this be from not enough radiator fluid? after emptying what was in the water pump line, and all the other hoses (when replacing them) it was filled with about half of one of the big gallon antifreeze/coolant containers available about everywhere
Old 02-26-2009, 08:36 PM
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also check your oil, my car was overheating due to old/low oil...just an idea, make sure you have no coolant leaks, and top it off if its low
Old 02-26-2009, 08:42 PM
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Could also have air in the system. Could have a defective water pump also. Ive had a couple new ones Ive installed break the shaft at startup.
Old 02-26-2009, 08:51 PM
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Does air in the system fix itself? Its non driveable

QUOTE (Ericy321 @ Feb 26 2009, 11:42 PM)
Could also have air in the system. Could have a defective water pump also. Ive had a couple new ones Ive installed break the shaft at startup.

That would be the worstcase scenerio
Old 02-26-2009, 08:53 PM
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Thermostat might be in wrong....happened to my friend.. long story.


IF you have air in the system you have to "burp" it.

Run it witht he cap off wait for air bubbles to come out.
Old 02-26-2009, 09:01 PM
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Does direction matter on the thermostat?
Old 02-26-2009, 09:06 PM
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Aparently it does on a nissian. Lol
Old 02-26-2009, 09:47 PM
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I'd say thermostat. He did everything else in his system but the Thermostat. If there's a big air bubble there, it'll not open.

So...

1. burp the system.

2. Check your thermostat.
Old 02-26-2009, 10:47 PM
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Burped
its fixed
running nicely
thanks for the tip
Old 02-27-2009, 07:33 AM
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Sure. GOod job folks.

You had a large air bubble at the thermostat, so the hot fluid wasn't getting to the thermostat to heat the wax/plastic pellet to open it via the spring. Now that fluid can get there, you know your thermostat works. LOL




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