So my car is at the shop again...

"BlazinAce - Doctor of Internal Combustion" (pbs) 09/22/2014 at 19:36 • Filed to: None

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For overheating issues. Or rather, future overheating issues. I'm not ruling out simple paranoia on my part, but the truth is that my car's been running a little hotter than usual, not close to overheating, but still hotter, so I took it in for a checkup. I have a strong feeling it's the fan that isn't working properly, or maybe I blew a head gasket somehow. Oddly enough, I was expecting my parents to give me shit for sendind the car in again (third time in 16 months, that's not a lot!), but I think they're starting to understand that these minor headaches are nothing compared to actually owning that car. So, that's a win.

Sweet Trav > BlazinAce - Doctor of Internal Combustion 09/22/2014 at 19:37

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Could also be scale build up in the Radiator. That can slowly raise temps.

BlazinAce - Doctor of Internal Combustion > Sweet Trav 09/22/2014 at 19:49

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It's possible. Likely even, but I'm not sure the people at the shop will look for it even though I specifically told them to. I suspect the fan isn't working because even when I let the engine run with the car parked, it doesn't turn on. I also noticed that sometimes, when driving, as the temperature gets to 90° C, the fan will come on, the temperature will drop, but when it gets to 90 again, nothing happens, it keeps going up.

Sweet Trav > BlazinAce - Doctor of Internal Combustion 09/22/2014 at 19:51

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I mean 210-220F isnt crazy for a modern car. My Monte Carlo is roughtly 190F going down the highway

BlazinAce - Doctor of Internal Combustion > Sweet Trav 09/22/2014 at 19:54

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True. The oil usually stays at 100° C, even the water gets hotter, but i'm a bit worried because it's a change of behavior, it didn't run that hot before...

Sweet Trav > BlazinAce - Doctor of Internal Combustion 09/22/2014 at 19:55

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What about atmospheric conditions? also maybe a radiator leak or hose leak? perhaps a heater hose? any loss of pressure in a cooling system leads to higher temps.

BlazinAce - Doctor of Internal Combustion > Sweet Trav 09/22/2014 at 19:57

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Hum, I don't think so, the water level is normal, and there's no water under the car when I move it.

Sweet Trav > BlazinAce - Doctor of Internal Combustion 09/22/2014 at 19:58

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could evap during driving.

JGrabowMSt > BlazinAce - Doctor of Internal Combustion 09/22/2014 at 20:11

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My friend with a serious street machine was seeing his temps start to run up, couldn't find the problem for a while, finally found that it was the wiring for the fans.

Have you ever had a reason to pull the water pump? If it's old enough and the coolant has never really been changed, it's entirely possible that the impeller is basically non-existent.

Could also just be a stuck thermostat. I have that problem with my SL, I just don't have the time at the moment to tear it into it, or the money to order a Mercedes Benz thermostat right now. Soon enough though.

BlazinAce - Doctor of Internal Combustion > JGrabowMSt 09/22/2014 at 20:47

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Wiring issues is one of my theories. Wouldn't be the first time I've had bad wiring, hahahaha... As for the water pump, I just swapped a new one in a couple months ago, so it should be good.

Axial > BlazinAce - Doctor of Internal Combustion 09/22/2014 at 22:54

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Thermostat also possible. Pain in the butt.

BlazinAce - Doctor of Internal Combustion > Axial 09/22/2014 at 23:20

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That's one of the two biggest possibilities I guess. Thermostat and electrical relay. Could also be faulty wiring, fan switch, radiator buildup, blown gasket...

Axial > BlazinAce - Doctor of Internal Combustion 09/22/2014 at 23:31

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Blown gasket also usually entails coolant leaking into your oil; that's an easy check with a dipstick and paper towel. Oil chocolate-milk colored? Gasket is dead.