An alcohol based fluid that is miscible in water and used to remove heat from the engine. Also see [tag:cooling-system] for related components such as the radiator and water-pump.

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2010 Mini Cooper S - Coolant leak from thermostat housing

For more than a month, I have been noticing coolant leaking from the thermostat housing. This was identified by the dealer and another Mini specialist mechanic. The dealer wanted the housing to be ...
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31 views

2000 Chrysler LHS coolant tank is giving off a bubbling sound when I park the car.

I recently had my thermostat replaced due to hearing bubbling in my coolant tank once I turn the car off I also noticed on the opposite side other coolant tank there was leaking on the ground not a ...
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417 views

1996 Rav4 not warming up properly when driving and heat not hot

I have a weird problem. I recently changed the radiator and flushed the whole coolant system during replacing the radiator. I also flushed the heating core by itself. The thermostat was recently ...
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2answers
65 views

No radiator fluid in resevoir

Obviously you shouldn't drive with no coolant, because in most cases obviously your car will overheat, blow a head gasket and all that fun stuff. I drive a 4cyl 2.5L Ford Ranger. One time I realized ...
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112 views

Coolant light is on even after topping off

2000 Pontiac Grand Prix Gte - My low coolant light came on so I parked let it cool down went to auto store n got the Dexcool antifreeze and filled it past the hot marker. Drove it on the interstate ...
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381 views

How does the coolant disappear?

If there is no leak? So how does the coolant level decreases as time passes? Does it get pressurized so it's level decreases? Or what happens? Since it keeps circulating to the engine and coming back ...
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50 views

Is there a way to guage when a 2015 Honda Civic reaches its normal coolant operating temperature?

Just bought a 2015 Honda Civic and then noticed that the coolant temperature gauge is not in the instrument panel. There are only two instrument cluster panel idiot lights dedicated to coolant over or ...
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2k views

Should overflow tank be filled when replacing coolant?

I have recently fully rebuilt my engine, minus the block and pistons. All the gaskets were replaced, valves lapped, valve lashes tuned etc. I did it because I had an overheating problem and a head ...
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84 views

Not using antifreeze in warm climates [duplicate]

I am just curious if antifreeze has any purpose in climates where freezing temperatures are guaranteed not to happen. Can 100% distilled water be used just as effectively to cool the engine just like ...
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How to dispose of engine coolant?

This question is pretty straight forward... How to properly dispose of engine coolant? Should it be taken to a treatment facility like used engine oil or is it safe to pour down the drain?
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235 views

The coolant is boiling when I shut off engine

I have a 2000 Chrysler 300m. A few days ago out of the blue my car cut off on its own and I was unable to start it for a few hours. I left it sit in the grocery store parking lot. Went back 3 hours ...
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134 views

What is the 2000 civic SIR coolant temperature sensor thread size?

I'm installing an Auto Meter water temp gauge and didn't receive an adapter with it. Anyone know the thread size of the stock coolant temp sender on a B16A2 engine? (Single wire)... I was going to do ...
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157 views

Honda Accord 1997 - Steam coming from small part of radiator, leaking coolant

After working fine all day, this afternoon I noticed my engine had heated up so hot the needle was above the red. I pulled over and there was steam coming from a small space on the radiator and it ...
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77 views

Do I have battery or engine problems?

Yesterday, I used my car to drive literally 2mins. Away from my dorm building to get to my class building and back because of bad weather. 30+mins. Later I come back outside and use my remote to ...
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232 views

Maruti Suzuki Swift Check Engine Light On And Engine Coolant Temperature Needle stay at 'C'

My Swift VXI has developed a condition. I have started to see the check-engine light on and the Engine Coolant Temperature Needle stays at 'C' after starting the engine. Engine gives a growling sound. ...
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43 views

oil in my radiator

I have a 95 f150. pretty much everything is original on it. I now have oil in my radiator but. looks like thick poo when I took the cap off. but when I checked my oil other than being a quart low the ...
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337 views

STEAM coming from under the hood?

This is my car ->(1990 Honda Accord EX Sedan 4 door 5 speed manual) Ok this is the first time I have ever seen a leak from my car. I bought it in Primo condition & I only use it for errands ...
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330 views

Motor oil going into the radiator and reservoir- Chrysler 300

I got the motor heads modified (think thats what you call it), timing belt and water pump replaced in March 2014. The last few months I've been having problems with my car over heating. It turns out ...
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328 views

Where is the engine temperature sensor located on a Mazda 323?

2003 Mazda 323 Astina, 1.8l, I am trying to figure where the engine temperature sensor is located in the car. How can I tell if it's faulty? I am only guessing it is because the car overheats, the ...
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358 views

04 Tahoe “Engine Coolant Hot” message

I am out of town with my Tahoe and getting the message "Engine Coolant Hot" on my dash message system. When it pops up I notice that the temp gauge goes up almost to the red line. Also the air ...
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299 views

How, and why, do you test coolant concentration?

In the owner's manual for my 2001 Ford F-150 (5.4L), in the section on "Adding engine coolant", it specifies the type of coolant to be used, and says it should be mixed 50/50 with distilled water. It ...
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148 views

Audi A4 1.6 2000 Coolant level sensor flashing

I have a problem with the coolant level sensor. After a minute of driving the temperature sensor on the car starts flashing and also alerts with beeping. Of course the coolant tank level is normal. ...
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262 views

95 Corolla overheats, probable coolant leak or maybe thermostat, need more advice.

Vehicle is a '95 Toyota Corolla. Was driving yesterday for about 5 minutes and glanced at the temperature gauge which I noticed was running pretty high (weather has been around 90 degrees f ...
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5k views

Flushing built up Rust and Mineral Deposits in Cooling System

The previous owner ran tap water in the cooling system for few years, and we have very heavy, mineral rich water locally. When I bought the car about six months ago, I drained the water, and put a ...
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210 views

Flushing coolant after driving only with water in

If I drive my truck for 30 min with just water in my system, would it be equivalent to just flushing it stationary (the proper way to flush it)? IOW, if I just drive around with a clean water refill ...
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5k views

Pros and cons of using straight antifreeze

I've heard from some people that they use straight antifreeze in their cooling systems and not 50/50. What are the pros and cons of doing that? E.g. does it reduce exposure to corrosion?
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234 views

How to test for radiator leaks?

There is coolant leaking from my 2007 Tacoma's radiator SOMEWHERE because there is leakage dripping from the lower right corner. I saw it when I took the skid plate off to replace the serpentine ...
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1answer
113 views

ISUZU CUBIC mixing oil in coolant

ISUZU CUBIC - CITIBUS ENGINE - 6hh1, 8300cc, 6 Cylinder, No Turbo I have this Isuzu with the above description. It is mixing oil and water coolant. I did not find water in the crankcase but found oil ...
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294 views

Ditch water in radiator

I lost a coolant hose going down the road and all my antifreeze was gone. I found a puddle along the road and filled my radiator back up after I fixed the hose. Will this cause electrolysis in my ...
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1answer
404 views

2008 Toyota Corolla - Overheated while idling, coolant full or very slightly low

My car decided to overheat yesterday. It was noticed while we were waiting to pick someone up from the airport. We shut the car off until they arrived. (15 minutes or so) We then drove home with the ...
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2answers
37 views

1997 1.8t Audi Quattro - using coolant

I have an issue with my 97 1.8T Quattro using coolant. I've checked for external leaks and can't find any. The engine oil is still clean. Has anybody had this issue before? Is it possible for it ...
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1answer
103 views

Coolant leak - 4g63 sohc 2.0L non turbo

Recently I was experiencing coolant leaks in between the engine block and the wheel on the passenger side. This only occurs after the car has been driven aggressively and once the car slightly ...
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149 views

1994 LT1 350 in a Caprice wagon. Oil getting pumped into the coolant and flowing past the coolant reservoir cap

The engine runs well and the transmission shifts well. The only indication was the oil gauge dropping at a stop light. I immediately put 3 quarts in. There was nothing visible at this time. When I ...
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54 views

radiator stop leak

I woke to find antifreeze all over the driveway. My reservoir was empty. I took it to the radiator shop and they said I had to leaks. Then I remembered I had the warranty so I took it to the ...
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847 views

oily sludge in coolant reservoir

I have Chev Cruze 2010. There was a heatup and I noticed thick creamy sludge overflowing from the coolant reservoir lid. Mechanic diagnosed issue with engine oil coolant and repaired it. Later he also ...
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237 views

added too much oil [closed]

I added too much oil to my 97 civic lx, drove it about 30 miles. It started to overheat and antifreeze started to leak from somewhere. I drained the excess oil, which looked brown, and started it and ...
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20k views

Coolant level is below “low” in the expansion tank, dealership service says this is normal?

I took my car to the dealership for an oil change and inspection, which includes the fluids being checked and topped off. After the service, I took a look at the fluids in the car. There is a tank ...
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9k 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 ...
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236 views

Renault/Dacia Logan 2014+ engine temperature indicator?

the Renault/Dacia Logan 2014 and above have indicators like this: As you can see, the dial at the right has the total mileage and the fuel indicator only. I'm wondering if there is an indicator for ...
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171 views

2003 Toyota Rav4 ECT Too Low for Readiness Monitor Drive Pattern

I recently failed an emissions test because my CAT and EVAP readiness monitors were "Not Ready" following a reset check engine light a few weeks back, which told me that the engine coolant wasn't ...
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2k views

What causes a low coolent temp light to come on a 2012 Honda civic

My 2012 Honda civic with 19,000 miles has a blue temp light on dash and it seems to be running fine?
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1k views

how to temporarily fix a gasket leak?

My thermostat gasket is leaking on my 00 Ford ka. Is there I sealant I can put around it as a temporary fix for a week or two before I can get it fixed?
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1answer
194 views

03 Ford Escape V6 Oil/Coolant/check fuel cap lights

I just had my oil changed and had coolant put into my car a few days before Christmas. Also, bought a new fuel cap the same day. All of these lights are still on and I have no idea how to make them go ...
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915 views

Is it necessary to run the engine after adding radiator coolant or only when draining?

I recently did a timing belt/water pump change on my own. When I changed the water pump i drained the coolant, and according to my mechanic, I blew my radiator by not running the engine with the cap ...
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2answers
210 views

Overfilled my Insight 2010 coolant reserve tank. How can lower the fluid level back without a pump?

I noticed my coolant level was down to the min line on the reserve tank. So I decided to raise the level up between the two lines. I got the proper coolant for the car and started filling. I did not ...
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1answer
504 views

2002 Mercury Sable with wrong coolant in it

My wife's 2002 Mercury Sable we purchased a year ago has red coolant in it. I found the owner's manual online and it recommends Ford Green or Ford Yellow. Will this coolant damage her vehicle? Can it ...
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546 views

Coolant below minimum every 6 weeks - Mk4 VW Polo

This is about my VW Polo (mk4). It's been a cat C in the past after taking a knock to the front bumper. It needs the coolant topping up every six weeks (ish). I've been carrying a bottle of water in ...
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503 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 ...
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333 views

Oil in coolent on my volkswagen Touareg

The coolant light came on so I took it to a mechanic he flushed it and put knew coolant some special g-12 coolant but the light came on again so I took a look at it and found oil in it . So I looked ...
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137 views

What is this (cooling-system related) part?

A while back I stopped my 2000 Ford Ranger (V6 4WD) and all of a sudden there was white smoke pouring out from under the hood, indicating that something was leaking radiator fluid. When I opened the ...