System which removes excess heat from liquid cooled internal combustion engine. It also helps maintain the engine temperature at a consistent level. The cooling system encompasses the radiator, water pump, thermostat, hoses, heater core, overflow reservoir, and anti-freeze (or coolant).

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10 views

1996 mazda 626 leaking coolant

My mazda 626 was leaking coolant. I replaced the radiator for there is clearly a hole on it. It worked fine for about a month. Then I see some leakage again. And this time it is around the right side ...
8
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4answers
29k views

Oil in the radiator, but no coolant in the oil

The car is a '98 Buick Lesabre with the 3800 engine and about 170k miles. It appears as though some oil was in the radiator, but I haven't seen any signs of coolant in the oil. The water pump recently ...
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3answers
46 views

The mysterious overheating honda civic

This is a tale that goes back about a year when I found my very first car. I needed it to commute back and forth to school. When I bought the car it worked great, everything I could have wanted. ...
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0answers
20 views

Car is heating while Coolant Temp Sensor is normal

I bought a BMW 318i and the car heated twice so far while the coolant temperature sensor is normal. If we exclude the possibility that the sensor is malfunctioning, what problem would cause the ...
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5answers
51k views

Can I drive a car with only water and no coolant if it has a leak?

Recently, I was informed that a car I share ('02 Nissan Sentra) was close to overheating. I was told it gets close to the upper limit very quickly upon running the car. When I inspected the vehicle, I ...
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1answer
23 views

Engine temperature increases when idling though thermo fan is working

I am trying to diagnose an issue with my Mk1 Golf. The engine heats up when the car is idling or in traffic but cools down almost instantly when I start moving again. I would presume this is the ...
2
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4answers
420 views

engine has too much cooling especially when driving hard

I'm trying to figure out why my engine temp is always very low. I do know for a fact that my gauges work. My car is a 4-afe toyota with a stock radiator and a modified fan. I also installed 2 ...
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3answers
39 views

Replaced water pump two days ago…today antifreeze filling up parking space

I have a 1998 Jeep Wrangler. A few days ago, I noticed the engine temp getting higher than usual. I'd checked fluids about a week prior. When I got home and checked fluids, the coolant reservoir was ...
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1answer
22 views

Camry 01 loosing coolant

I've camry 2001 LE, with 149K on it. Recently, I noticed coolant leak from the radiator and replaced the radiator. I still was loosing coolant little bit, so performed coolant pressure test. The upper ...
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3answers
36 views

Drove up a curb in my '94 525i bmw and took a chunk out of the sidewalk

Immediately after going up the curb i put the car into reverse, and then park where i then turned the engine off as quickly as possible. Four of the fan's blade broke off, front right blinker popped ...
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1answer
24 views

Does my BMW e36 320i 1992 have a Gearbox cooler

Does the BMW e36 come equipped with gearbox coolers, if not, can I install one. Thanks
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1answer
232 views

Honda hybrid fan on after engine off

What is the reason my honda civic 2005 (manual) hybrid turns the fan on, after I turn the engine off? A mechanic told me that is meant to cool the engine down. Why does Honda need to have the engine ...
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2answers
128 views

Golf mk3 TDI has pressure in the cooling system

I have an interesting problem on my VW Golf MK3 TDI. Basically, sometimes the pressure cap on the coolant reservoir lets out some coolant. Here's what I know: It happens when the car is under ...
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0answers
16 views

2005 Chevy Impala Overheating

My 2005 Impala is overheating again. It had a leak in the radiator, so got new one. Now it's leaking from the metal hose pipe that's connected to the radiator and runs under the engine and around ...
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0answers
33 views

volkswagen golf ABU loosing too much coolant

I have a volkswagen golf ABU why does too much coolant overflow from behind the bolt head that holds on the outlet flange on the head?
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6answers
8k views

My car's coolant temperature reaches almost 100 C / 212 F in a fast pace

Today, after a very hot day, I saw that my coolant was almost reaching 100C/212, I pulled over, stopped and took a look over the hood. The very little water that remained in the coolant tank was all ...
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2answers
70 views

Can you drive a 1999 Dodge Ram 1500 when the heater core is bad?

I am thinking of purchasing an older Dodge Ram; the listing on craigslist says that the vehicle is in good condition but the heater core is busted. I'm willing to go without heat/AC till I get around ...
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2answers
59 views

Engine temperature light always on

On my Volvo 440 (1992 1.8 LI with single point injection) the engine temperature warning light is always on. The gauge seems to work okay and fluctuates between low and middle (although it does seem ...
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5answers
22k views

What can cause a vehicle to run hot, but not overheat?

Anyway, I have a Grand Am 2003 V6. It only has 80k miles. My car ran great when I got it(used), but at some point it began to have minor temperature problems. It would always run a little bit hotter ...
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2answers
83 views

How does the heater core work?

How does the heater core work? What are the inputs to the system? What are the outputs of the system? What are some common ways that it can fail?
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2answers
39 views

What items are in the cooling system loop?

What items are in the cooling system loop? I know there's the Radiator, and the Block, but what else?
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1answer
55 views

In the -20F temperatures last week my temperature gauge was stuck under the 1/4 mark. Heating was also affected

Now that it has warmed up, things are back to normal. Even my heat is back. I think that my thermostat was stuck, but can they get "unstuck"?
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1answer
66 views

Blazer overheating in cold temperatures

Sorry, this is going to be a bit wordy. I have lots of details... A few weeks ago, the temperature was in the single digits with a negative wind chill. I started up my 96 Blazer and let it run for 10 ...
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4answers
44k views

What happens if I drive without antifreeze in my car?

What happens if I drive without antifreeze in my car (no water / no antifreeze)? This is my main question. I've added some follow up questions that are specific to my situation but for the main ...
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votes
3answers
1k views

Are there any disadvantages to using a “Radiator Stop Leak” product?

I have had a slow leak form the coolant system for a few months, if I drive the car every day I have to top up every few weeks. The car has 200K on the clock and is a VW Passat TDI, I only drive ...
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1answer
10k views

Getting the best results sealing head gasket leak with Blue Devil

The 1998 Subaru Outback I've been having cooling system problems with turns out to have a combustion gas leak into the coolant. I suspected this but couldn't get a test to turn up anything; taking it ...
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3answers
145 views

VW Golf TDI 2007 Coolant Leak

Had waterpump replaced and belts, but the reservoir keeps running out of water in traffic but seems okay on open road, mechanic has had a look and no visible leaks and checked gaskets and all okay. ...
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votes
2answers
177 views

OVERHEATING 07 grand prix

My car has been overheating bad I took it to auto zone and hooked it up to the check engine thing and they said it was getting to 207 withing 10 secounds. It get hot fast and my heat doesnt work ...
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4answers
2k views

F-150, heater will blow hot, then cold

F-150, heater will blow hot, then cold and then heat gauge will rise to extreme high, will boil over then gauge will drop to normal. Just had it flushed and no change. After driving for about 10-15 ...
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votes
1answer
140 views

Washing coolant system with dish soap to remove oil residue

Someone mentioned it is a good idea to wash the coolant system with dish soap to remove residue oil. I was wondering if that is true or can it have any side effects?
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3answers
15k views

Cooling fans not running

My 2000 Pontiac Grand Am GT (6 cy/3.4L) has been having cooling issues. I started by replacing the thermostat and performing a flush & fill on the radiator. This didn't seem to resolve the issue ...
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1answer
63 views

Overflow tank's lid has been opened for a long time

I've just found that overflow tank's lid has been opened by itself. I dont know how long maybe four months since I bought it. Coolant level is now above the full mark. Does it cause any damage to the ...
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votes
3answers
121 views

Should I get a second opinion from a different mechanic?

Previous question for context TL;DR: My 2001 Pontiac Grand Am SE had a flashing check engine light and I found oil in the coolant. A family member took the car to a mechanic this week. He checked ...
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votes
3answers
246 views

Oil in my radiator fluid tank?

I have a 97 Ford F350 with the 7.3l powerstroke diesel engine. There's oil where my radiator fluid should be. Do I have a blown head gasket?
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1answer
879 views

What is Honda Coolant?

My 2000 Honda Civic 1.6 Aerodeck is getting a little low on coolant, and so needs a top-up. The question is - what do I put in? The manual rather unhelpfully says "use Honda coolant", but doesn't ...
4
votes
2answers
243 views

Strange cooling circuit problems in a 1997 vw golf mk3 tdi

Driving across Europe, i noticed the car was using water. I drove slowly and got to the destination. Since then, the symptoms have been getting stranger. The water loss is caused by excess pressure ...
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2answers
95 views

Why doesn't the engine coolant dry up while the engine is running?

Why can't coolant dry inside the engine during engine operation?
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1answer
107 views

What causes grey engine corrosion?

I recently had my oil light come on in my 2004 Chevy Malibu. This resulted in a visit to a mechanic (after putting 3 QTS of oil in it) to see if there might be something more serious than a leak ...
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2answers
92 views

2003 Acura TLS running hotter than usual

I'm having some concerns with my car's engine temperature. Last weekend after being stopped at an intersection, the engine temperature went up higher than usual, about 75% of the way to the red line. ...
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votes
1answer
238 views

Ford Explorer overheating

2003 ford exp xlt overheating. replaced t-stat and dumped & refilled coolant. Still over heating bad when on the highway at about 65 mph.
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2answers
489 views

95 geo metro 1.0L pushing coolant out of overflow

I have a 95 geo metro. Car runs good and has normal power. When car is idling it runs fine with no overheating or coolant being pushed out of the overflow. I was told to replace the water pump, ...
4
votes
3answers
340 views

94' Honda Civic Cooling issues

Here's what's going on: The temperature remains constant on the highway. The temperature remains constant for short trips. The temperature generally remains constant when the car is not moving. (It ...
3
votes
3answers
2k views

What is the Magic ON temperature for Electric Fans?

I want to wire up my old truck to turn an electric fan ON to keep the radiator cool. The ECM has an engine coolant temperature sensor mounted in the engine that alters the resistance to determine ...
2
votes
3answers
422 views

Clear water in coolant reservoir

Over the weekend I took my 2000 Toyota 4Runner to a local shop to get the oil changed. While there they told me I needed to flush the coolant, pulling clear water out of the coolant reservoir. They ...
4
votes
2answers
1k views

Overheating & coolant loss in 1998 Subaru Outback

I'm having trouble with this vehicle overheating, presumably from losing coolant. The problem is very similar to what's described here: ...
7
votes
6answers
3k views

Can radiator cool down a car too much?

Recently they replaced my stock radiator with aftermarket one (at dealership, so I hope they knew what they were doing), and since then I feel that a car is not warming up enough. Even if I warm it ...
2
votes
1answer
271 views

What happens when under-filled coolant overheats?

I have a bmw k1200s motorcycle. You suppose to fill in the coolant using vacuum. I usually fill it in at home, drive to a dealer and let them deal with the vacuum stuff. it didn't work out this time. ...
5
votes
2answers
665 views

Changed radiator, now have misfiring?

I have a 1996 Nissan Altima. I had to change my radiator recently because it developed some cracks on the top of the tank and I would have to refill the tank every few days. When I changed the ...
2
votes
2answers
281 views

How to know if a radiator is getting sufficient airflow

I have recently purchased a dune buggy as displayed in the photo below. Note the position of the radiator located above the seats. What I am wanting to do is install some clear perspex in the window ...
4
votes
1answer
684 views

2005 Subaru Forester XS overheating

While on a roadtrip, the car started overheating with coolant boiling out. We refilled the radiator with coolant, but it kept occurring. We managed to make it back home by having the heater on high ...