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Old 09-24-2019, 11:14 AM   #11
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Should the hoses feel pressurized like on a normal vehicle? Does anyone know anything about the garbage cooling system on these damn cars?


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Old 09-24-2019, 04:07 PM   #12
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So the cooling system doesn't have a bunch of parts. Radiator, Thermostat, water pump, heater core, hoses. Shouldn't be too bad to troubleshoot. I would start with a good flush. Most people just put tap water in the cooling system. I don't know about you... but here in the city I won't even drink that crap. There is a ton a solids and organic material floating around in it. It will eventually clog your cooling system. (ONLY USE DISTILLED WATER IN YOUR COOLING SYSTEM). How did the coolant look when you replaced the thermostat? I would completely remove my Thermostat and flush and flush and flush. Reinstall without the thermostat and see how she cools. Leave the cap off and check to ensure you have good water movement. That should let you know If the thermostat or water pump is the issue. You already know your fan works. 18 years for a radiator is a LONG time. It might be time to get you another one.


Could be faulty thermostat sticking. I know you just replaced it... but sometimes parts come broken from the manufacturer.


You also could have a air bubble trapped in the system.

https://www.instructables.com/id/How...ooling-system/
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Old 09-24-2019, 06:07 PM   #13
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My wife's car is doing the same thing. A/C off and fast revs make it hot. A/C and low rpms and it slowly cools down. Im blaming the plastic impeller water pump. Ordering a metal one soon.
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Old 09-24-2019, 11:46 PM   #14
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Honestly, I gave up. Itís an $800 car. Iím going to drive it till it blows up. Already talking with a few dealers on new cars. Iím not doing the pos beater car crap anymore. Thanks though.


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Old 09-25-2019, 07:59 PM   #15
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I don't blame you one bit I work too hard to drive a piece of shit car like a crackhead.
Let us know what your new ride is when you get one.


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Old 09-25-2019, 11:50 PM   #16
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Can you hear the fan work in low and high speed. If it only kicks on on high speed it will over heat at random. There is a wired plug right behind the radiator that goes bad. I soldered mine, no more random over heating.
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Old 09-26-2019, 01:44 PM   #17
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And how most Focus cars get into the scrapyards. They change literally everything but never look at the simple fan electrical.

If the first post pic is as hot as it overheats then the low fans are not coming on, the high kick in later to stop a full overheat into the red and buried needle. Rad fan resistor or low relay. Had it happen once then fixed to never happen again on mine. People would rather burn a car to the ground than change a simple relay.
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Old 09-28-2019, 06:01 AM   #18
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Well, I got pissed off. It happens. Dealing with the va and a now rotating work schedule, which is bs and screws up any hope of a solid sleep schedule. The pic isnít as hot as it gets, that was just a pic on flat ground. I believe I said earlier it was getting to 120c. Which is ungodly hot.

I pulled the thermostat in the shop at work and have been driving without it. No heat, but it runs cooler than it should. After boiling the t-stat, I found it opens at 210, and only about 1/16-1/8 of an inch when it does open.

Guess Iíll buy a new thermostat. And at highway speeds, the low fan coming on shouldnít matter, at 65mph even on high, there is so much air coming through that Iím sure it exceeds the fans capability.


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Old 09-28-2019, 06:03 AM   #19
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And the fans do work. Ish. Low speed only comes on if it idles up to the temp, high speed comes on at cruise and stays on until it cools down.


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Old 09-30-2019, 07:25 PM   #20
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If the heater doesnt blow hot, when it should, it's usually, due to a lack of coolant. But if low coolant is not your problem, then I would imagine a lack of circulation, in effect a bad water pump. Anyone else think this is the case?
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