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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1answer
41 views

MK 1 citi sport temp gauge fault

I own a MK 1 Citi Golf Sport 1.6 Carb that has 523220 km and recently flushed cooling system and changed coolant. after flush the temp showed above normal despite changing EVERYTHING! I also replaced ...
8
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5answers
60k 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 ...
0
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0answers
22 views

Honda civic 2002 overheating fast

I just drove my civic 2002 for about 15 mins @ 40mph. The temperature went up to the max. Hot coolant blew out my reservoir cap. Help me diagnose please?
0
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0answers
16 views

2003 Pontiac Montana - overheating issue

My vehicle tends to run hotter than normal all the time. My mechanic said it is common for Montana's to run hotter during slower, in-town driving. The smell of antifreeze is constant.
1
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1answer
58 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 ...
1
vote
2answers
54 views

car over heating and white smoke coming out of the hood

I have a 98 Honda civic that I bought a few months ago. It has an after market fan that i have to turn on when I'm driving to keep it from over heating. In the winter time it wansnt a big deal to turn ...
4
votes
1answer
260 views

2015 STI White smoke

My 2015 Subaru WRX Sti is emitting white smoke from the exhaust. The smoke smells like burning electronics. When I pull over and open up the hood, I also see white smoke in the engine bay. The smoke ...
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6answers
5k 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. ...
3
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5answers
24k views

Cooling fans not running

Update This question seems to be attracting a lot of views, so I guess a lot of people are having the same problem. Just to be clear, the problem with MY fans specifically seemed to be caused by my ...
4
votes
2answers
37 views

Bad Dashboard Coolant Temp Sensor?

In addition to the coolant temp sensor hooked up to the ECU, I have a second, single wire coolant temp sensor which is hooked up to the dashboard display. When the coolant temp is around 85C, right ...
4
votes
1answer
47 views

Engine's Normal Operating Temperature

I read in the Motor Oil University article on Bob the Oil Guy's websites that: The automotive designers usually call for their engines to run at 212°F ( 100°C ) oil and water temperature with an ...
4
votes
2answers
4k views

Engine never warms up (actually: it cools down) at highway speeds

I have a 1997 Caravan (base model) and normally on my drive to work and my highway drives in rush-hour, the engine warms up just fine. I took a road trip for work, about an hour and fifteen minutes ...
2
votes
1answer
21k 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 ...
3
votes
0answers
15 views

Ford Expidition Eddie Bauer 4.0 v8 2003 automatic rpm goes high

When driving, sometimes when I want stop the vehicle, I go to press the brakes, but that time engine rpm goes high, keeping brakes pressed hard, after 5 second engine becomes normal. It goes high when ...
4
votes
4answers
8k 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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1answer
17 views

After car runs with temp normal it drops to tempature reading cold

My car temp reads normal but after warming up the tempature drops showing on the gauge engine is cold and the heat in the car gets cool
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1answer
40 views

When pouring in anti-freeze why does choking the hose allow it flow better

Just wondering what exactly is going on there. When I pour in antifreeze and choke the the hose the antifreeze flows a lot better through. Any idea why this is? Thanks
2
votes
6answers
34k 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 ...
1
vote
1answer
120 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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0answers
26 views

Low Pressure with New Coolant System

I recently had my head gasket, radiator, thermostat, and hoses replaced on my BMW 318i, but the water pressure is still showing there is a leak somewhere; any idea what is going on?
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vote
1answer
114 views

Dodge Ram 1500 SLT 4.7 Losing Coolant

I have a 2003 Dodge Ram 1500 with a 4.7 magnum, and I have replaced the radiator, thermostat and water pump. I keep having to fill the reservoir every couple of days. Fluid keeps coming out of the ...
1
vote
1answer
39 views

Oil in the cooling system

I have a 2003 Chrysler GT, PT Cruiser with less then 60000 miles. It is a four cylinder 2.4L, that is turbo charged, and is automatic. I had a hole in the over flow tank and had it replaced with a new ...
2
votes
1answer
109 views

Changed thermostat but now constant leak around thermostat housing

I went to flush my cooling system and change the thermostat on my Mk1 Golf. All went fine until I put the new coolant in. There is a pretty steady leak from the thermostat housing. I've tightened ...
0
votes
1answer
77 views

Motor Oil in Coolant Reserve [duplicate]

2004 Mercedes E500 - Yes, I am sure of it. In a moment of stupidity, I added about 8oz of motor oil to the coolant reserve. I have heard nothing will happen and I've also heard it can mess up the ...
4
votes
2answers
493 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 ...
0
votes
0answers
81 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 ...
9
votes
4answers
75k 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 ...
2
votes
1answer
129 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
votes
4answers
554 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 ...
4
votes
3answers
133 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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votes
3answers
56 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 ...
0
votes
1answer
48 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
1
vote
1answer
448 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 ...
0
votes
0answers
51 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 ...
0
votes
0answers
39 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?
11
votes
6answers
13k 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 ...
0
votes
2answers
538 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 ...
2
votes
2answers
79 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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votes
2answers
269 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?
0
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2answers
40 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?
0
votes
1answer
81 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"?
5
votes
1answer
146 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 ...
7
votes
4answers
76k 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 ...
3
votes
3answers
3k 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 ...
1
vote
3answers
239 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. ...
3
votes
2answers
385 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 ...
3
votes
1answer
306 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?
1
vote
1answer
74 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 ...
3
votes
3answers
133 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 ...
3
votes
3answers
490 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?