Headgasket
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So I’ve got a 93 eg d15b, coolant overflows to res but doesn’t return when cold, I’ve also never heard the fans turn on and I know they work because I’ve jumped them from the coolant switch, I have also bought a new coolant switch and coolant temp sensor. Would the headgasket cause the coolant to overflow and not return and the fans not to turn in any help is appreciated
#2
Dr Krieger of Modification
Re: Headgasket
The fans aren't related to the head gasket, directly. Those should turn on when the vehicle reaches the right temperature.
But the fans not turning on could have caused the head to overheat, warp, and unseal the head gasket.
When the head gasket leaks, exhaust gas displaces the coolant in he cooling system and it overflows into the res.
If while the engine is cold and you open the radiator cap and hear/see bubbles, the head gasket is definitely leaking.
But the fans not turning on could have caused the head to overheat, warp, and unseal the head gasket.
When the head gasket leaks, exhaust gas displaces the coolant in he cooling system and it overflows into the res.
If while the engine is cold and you open the radiator cap and hear/see bubbles, the head gasket is definitely leaking.
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Would that be the reason the fan would not turn on tho? The circuit seems to be fine according to my testing, unless I’ve just so happened to have gotten a bad coolant fan switch from auto zone. I don’t want to replace the headgasket and the fan still not turn on and ruin it again.
#5
If you think a good mechanic is expensive, try hiring a bad one
Re: Headgasket
Would the headgasket cause the coolant to overflow and not return and the fans not to turn in any help is appreciated
Radiator fan does not run until its thermoswitch is hot enough to close its contacts, and the temperature of the liquid at that switch is not necessarily going to be the same as engine temperature shown on the gauge in the dash.
If you suspect the head gasket is blown, do tests that would prove or disprove such.
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Let car idle for like 30 minutes filling with coolant and reviving. Bubbles started coming out whenever the car was at operating temp and when I held The throttle. Was I seen it the first time it started bubbling every like 10 seconds. So I guess no doubt the headgasket is blown right? Last question would be would the headgasket cause the fan not to turn on
#7
If you think a good mechanic is expensive, try hiring a bad one
Re: Headgasket
Didn't the fan ever run during this time?
So I guess no doubt the headgasket is blown right? Not necessarily. Like I said, if you believe it's blown then do tests that would prove or disprove such.
If the fan never turned on and the radiator cap was not installed, the liquid in the engine could have simply been boiling.
Or maybe it was expelling trapped air pockets.
An engine can run hot and/or overheat with less than a quart of liquid missing from the radiator.
Any loss of liquid can compromise cooling system efficiency.
There is very little reserve capacity in those small systems.
Last question would be would the headgasket cause the fan not to turn on In and of itself, no. But if the fluid level inside the engine has dropped, then yes.
When a cooling system is low.......the engine itself could become hot enough to suffer damage, yet the fan thermoswitch might never get hot enough to turn on the radiator fan. This DOES happen.
So I guess no doubt the headgasket is blown right?
If the fan never turned on and the radiator cap was not installed, the liquid in the engine could have simply been boiling.
Or maybe it was expelling trapped air pockets.
An engine can run hot and/or overheat with less than a quart of liquid missing from the radiator.
Any loss of liquid can compromise cooling system efficiency.
There is very little reserve capacity in those small systems.
Last question would be would the headgasket cause the fan not to turn on
When a cooling system is low.......the engine itself could become hot enough to suffer damage, yet the fan thermoswitch might never get hot enough to turn on the radiator fan. This DOES happen.
#9
If you think a good mechanic is expensive, try hiring a bad one
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