Join Date: Apr 2018
Location: Southern California, USA
Vehicle: 2001 SLK 320
Other Toys: 1997 Audi A4
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Random Overheating, What’s The Issue??
Hi all, happy weekend to everybody.
A day or two ago I posted about my coolant light coming on and blinking randomly throughout my drives despite being topped off with the correct fluid. Yesterday as I was driving, A/C full blast in this So Cal weather, I noticed my temp needle creeping upwards.
I gave it 2-3 seconds to come back down but it didn’t, went over 100c and I immediately pulled over, coolant gushing all over the place. Mind you, I have replaced the radiator, thermostat, coolant temp sensor, coolant level sensor and even the belt so this was a surprise.
The past few days I have noticed a weird whistling/winding noise coming from the engine bay that has come on 2-3 times during my drives. The noise will probably last 3-4 seconds but I have never heard it before, even with the noise the car felt and drove fine.
As soon as I pulled over I let it cool down for about 30 mins, then drove to the closest Autozone to buy Blue’s European Coolant. Filled up the reservoir and drove again, however the temps went up high again so I pulled over and let it rest for another 30-45 mins. Topped off again and made it home. (Damn So Cal weather ad traffic doesn’t help). I also drove it later that night, for an hour or two, it was probably 75 degrees outside and the engine temp was perfect, no coolant light or overheating but then again I wasn’t in traffic like earlier, didn’t have A/C on and was much cooler than earlier.
I suspect it is my water pump and bought one online yesterday just because it wouldn’t hurt to replace it. But does anyone have any guesses as to what it may be? Any personal experiences with water pumps? I would love to hear what other have to say.