Running HOT !
11-05-2006, 01:18 AM
#1
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Running HOT !
Well, got the motor put back together. Flushed the radiator, new hoses, thermostat housing, 180 degree thermostat, summit aluminum radiator, and fan shroud.
Drove it around the block and the water temp gauge pegged out at 250 degrees!
What's the deal? Bad thermostat? Water pump?
Drove it around the block and the water temp gauge pegged out at 250 degrees!
What's the deal? Bad thermostat? Water pump?
11-05-2006, 02:50 AM
#3
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RE: Running HOT !
yeah i was pretty meticulous about that stuff -
i just checked the motor again after 2hrs of sitting w/ the hood open, it's at 175degrees.
what's the trick w/ putting the thermostat in boiling water? just watch if it opens?
i just checked the motor again after 2hrs of sitting w/ the hood open, it's at 175degrees.
what's the trick w/ putting the thermostat in boiling water? just watch if it opens?
11-05-2006, 10:30 AM
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RE: Running HOT !
Make sure the thermostat is put in right. The long nose with the spring goes in toward the engine. With the cap off, start the engine and look inside the radiator to see if water is circulating at operating temperature. Check the bottom hose to make sure it is not collapsing. If it is, then the spring in the hose is shot.
11-05-2006, 07:34 PM
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RE: Running HOT !
Check the thermostat first before you drain it all. If the thermo opens in boiling water, then suspicion the water pump. If that is OK, then you may have a clog somewhere like in the rad or one of the main water passages in the block.
On edit: Double check your fan to make sure you put it on right. The blades slant back toward the engine so it pulls and not pushes the air. Also, feel of that lower rad hose to make sure it is stiff from the spring being inside. If not, then you need to get the correct bottom hose with the spring in it because the hose will collapse under pressure, therefore shutting off the flow of water.
On edit: Double check your fan to make sure you put it on right. The blades slant back toward the engine so it pulls and not pushes the air. Also, feel of that lower rad hose to make sure it is stiff from the spring being inside. If not, then you need to get the correct bottom hose with the spring in it because the hose will collapse under pressure, therefore shutting off the flow of water.
11-05-2006, 08:04 PM
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RE: Running HOT !
Thermostat does open in boiling water....
Does the coolant flow from the lower hose up through the block or down through the block from the upper hose?
I suspect now maybe radiator clog? Since no coolant is not visibly moving through it...
(should it be rushing through the radiator? it's pretty calm but not sure what the flow rate should be)
or maybe the water pump went out, that was the ONE thing i didnt replace (fan still spins though, but that has nothing to do with it?)
Does the coolant flow from the lower hose up through the block or down through the block from the upper hose?
I suspect now maybe radiator clog? Since no coolant is not visibly moving through it...
(should it be rushing through the radiator? it's pretty calm but not sure what the flow rate should be)
or maybe the water pump went out, that was the ONE thing i didnt replace (fan still spins though, but that has nothing to do with it?)
11-05-2006, 08:55 PM
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RE: Running HOT !
The water pump may act like it is working because the fan belt is turning it, but the bearing could have gone out and the pump is not actually working. However, usually whenever the pump bearing goes, you have a lot of leakage. If your pump is not leaking, most likely it is OK. Yes, you should be getting a good flow over the top of the radiator. It will look like a fast river running, and the water runs from the bottom of the radiator to the engine, then back through the top hose to run down through the radiator to get it cooled.
If I were you, I would take the radiator out, then take the water pump off and make damn sure the pump is still turning. If it is, then all you have spent is a little bit for a gasket and some goop. If not, then you have found your problem. If the pump is still in good shape, then either the rad is clogged, or you have a clog in the block.
If I were you, I would take the radiator out, then take the water pump off and make damn sure the pump is still turning. If it is, then all you have spent is a little bit for a gasket and some goop. If not, then you have found your problem. If the pump is still in good shape, then either the rad is clogged, or you have a clog in the block.