One suspect is idleing after overheat indication not cooling the motor quickly. Check time to overheat, idle vs say 2500 rpm. If it wasn't overheating before water pump, that is 1st suspect. 2nd is radiator clogging, 3rd is lower hose collapse- does it have a spring inside it? You have to narrow down your possible suspects list as logically as you can and as easy as you can. Was the coolant always clean?.....Pressure test is a good starting point. Two 1/8 holes drilled in thermostat is also one I recommend for everyday use.
Okay, new problem, the engine is overheating
- Thread starter Rummel6
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Rummel6
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I was thinking it was the cap not holding pressure since the fluid drops with it on or off and it seems to be letting radiator vapors come out of it when it’s hot but this danm thing is only 6 months old to not sure how often they fail
It's worth replacing. Simple things first.
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Is the cap leaking like that a symptom of the rad fluid dropping when I rev the gas
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If in park, idling with rpm increase a slight drop in water level is not unusual. With the new parts, failure of these is odds are less likely but not unknown. You have no heat at heater outlet? Are heat core inlet and outlet hoses temp correct for indicated engine temp? Is thermostat working correctly, failed open will not transfer heat causing overheat under load. Thermostat installed backwards? Cylinder combustion leaking into water jacket under load? Get test kit for gases in water. Ensure no collapsed radiator hoses. Proper waterflow through radiator. No buildup. No sticks, dead birds, dog fur, grass small rocks in radiator fins look close shit is small and gets packed in between fins. Pressure test whole cooling system. Pressure test cap separately. Heater core can act as a sediment pond. Even keeping good cooling maintenance, can still lose some efficiency.
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The problem it appears there are multiple condition issues. That don't seem connected. No heat in heater outlet. Hvac control head, blending doors, no or reduced flow through heater core. ( did you pull hose off heatcore return, good coolant flow?) Without being there my first easy idea is cap or thermostant failed open or no thermostant, resulting in no temp control. But that conflicts with no heat. That brings you back to similar but separate problems. Time to work on sons school commuter POS. Good luck.
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So found out today when it overheated the top radiator hose
Is stiff as hell
Is stiff as hell
ivin74
05 NBS Nali
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I just replaced the thermostat again so I guess the pump is all that’s left was worried my head gasket was leaking because I just did the dod delet 8 months ago
You can rule that out with a leakdown test. I have lots of experience with head gasket issues in other makes of cars. The symptoms you're describing are classic when the breach is between the combustion chamber and the water jacket. It's worth performing the test before you replace the water pump.
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