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Questions tagged [coolant]

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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Why would a coolant reservoir be full to the top when the engine is cold?

I’ve got a 2004 Honda Civic DX that has been acting up lately. It started with the inside of the car started blowing cold air when driving at low speeds or in park, and I thought it was maybe the ...
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Cyclinder 2 misfire error code - 11 Dodge Journey 3.6L V6

2011 Dodge Journey Mainstreet 2wd 3.6L V6 100k miles Check Engine Light on, first read Low Voltage replaced Battery Check Engine Light came back on, 2nd read Cylinder 2 misfire, & Thermostat ...
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oil is mixing into coolant water

i have an opel astra twintop 1.6 2009. oil is mixing into coolant system. there is oil in expantion tank. almost all the oil goes into expantion tank. Can you show me the way how to solve it? we ...
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Full coolant expansion reservoir when cool but low in the radiator

My 98 buick century limited has a overfull coolant expansion reservoir when it's cool but the radiator light is on and the radiator is low on fluid. I'll fill the radiator, light goes off, drive it a ...
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Low coolant level and high engine oil in VW

I have a 1.5 year old (mileage ~7000km) Volkswagen Vento with 1.6 MPI Petrol engine. Recently I noticed that my coolant level was below minimum and my engine oil level was higher than the max on the ...
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Just had engine rebuilt, since that i had to replace fuel pump, now heater is blowing and no hot air. Could this be due to the rebuild done?

i just had an engine rebuild and since have had several minor but potentially expensive issues. Can a heater be affected by an engine rebuild? I picked it up 3 weeks ago and was informed that if my ...
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radiator removed – is it still possible to flush system?

I'm replacing radiator and a/c condenser on my car. After hitting a deer, they both bent inward and most of the coolant leaked out of the car. I got both of them off the car and realized I forgot to ...
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89 Hiace, Coolant full but when I open the radiator cap its empty? Is this normal?

recently bought a 1989 hiace an im worried if it is overheating. Check coolant level and it is perfect, but when the radiator cap is opened it is dry inside. Very little driving experience. Is this ...
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2003 Honda Overheating issue

Okay...I have read all other posts and while some are exactly what I am experiencing it is slightly different. My car will overheat after 30 plus minutes on the freeway. I can turn the heater on and ...
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Liquid noise after opening coolant cap while warm

Today I got the message the coolant level is low, checked when cold, it was below the minimum. I made the mistake of partially opening the coolant cap while engine temp was halfway to its operating ...
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What makes this coolant brownish looking?

When removing the radiaor cap I beleive the coolant should be a clear colour, in my case a clear pink colour. However looking under the radiator cap, as you can see in the picture, I can see a kind ...
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133 views

Did the shop use the wrong coolant in my car?

02 Honda Civic EP3/SiR I noticed the coolant was a bit low, asked the shop to top it up while it was in the other day. The manual indicates to use Honda Coolant/Anti-Freeze Type 2 part # OL999-9011 ...
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Just noticed my coolant is a bit low. Could this have caused any damage?

02 Civic SiR. I just noticed the coolant is about an inch below the "low" mark on the reservoir. There are no operational problems, runs normally, doesn't overheat. Is this low enough to have ...
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No heat in my car

My front windshield would fog up from time to time whenever I left the car which says that there's water causing moisture somewhere, I also had to put quite a bit of coolant in with in a few months ...
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Coolant Level Drop

I have a 2013 VW CC 2.0 TSI. I have noticed a slight and continuous drop in the Coolant Level within the expansion tank, unfortunately no trace is found on the floor. I happened to go underneath the ...
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Distilled or deionized water for Audi G13 coolant?

The back of the Audi G13 coolant concentrate bottle I have specifies "use with distilled water ONLY", is it OK to use deionized water instead, or any other kind of water? I’ve read a great deal of ...
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2004 Chrysler Sebring Coolant Overflow

So my dad and I replaced the thermostat, outlet housing, and radiator within the past month (all went bad at once) So ever since replacing the system, we have been noticing that as we put coolant in ...
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What is the safest approach to deciding what coolant to use when you have no spec?

On a modern automotive engine, if the system is flushed with water, is it safe to use regular non-OAT ethylene glycol coolant and then continue to replace it at the defined interval (2 years for ...
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Why Vw tdi taureg losing coolant quickly?

After 5 years VW taureg tdi needs coolant added in 4 weeks and car functions fine with no signs of leakage, why?
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39 views

reduce coolant consumption

I am confident that my COOLANT consumption is normal but I would like to reduce it. It seems to me that coolant overflow systems are less than ideal. The air space above the coolant in the bottle must ...
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How often should we change Coolant Temperature Sensor, and is it life time long?

I drive Nissan Sunny 2010 N16, it has 225000 KM, I am experiencing extra fuel consumption, for 45 Ltr it makes only 350 KM in average (high way/city) driving, one week back I changed the oxygen sensor ...
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Using lots of coolant, suspect head gasket

1998 Subaru Forrester, 4 cyl. I don't remember the exact specs of the engine. It's using what seems to be a lot of coolant -- probably 2 qts in a 30 day time span. There's no leak (I've left ...
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Prestone yellow bottle coolant vs old green coolant

98 civic ex has always had “green” coolant. Now not sure if that’s original used stuff or what. However I noticed you can’t really find regular old green coolant that uses silicates and had to be ...
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Can you have coolant in the resevoir tank while the radiator is low on coolant?

Suppose my coolant reservoir has gone low and but is still showing a little coolant. I was under the impression that the rest of the system is still full (even when leaking) since if the radiator was ...
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Was I right to drive with leaking radiator given these assumptions?

I noticed coolant was leaking and drived home slowly. By the time I got home I noticed there was no more leaking so could be all coolant gone. It seems to be from the radiator however I could be wrong....
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How to prevent nut falling off ring wrench?

I have minimal space to work with on a BMW X3. I am changing the coolant. I am following these instructions: https://www.newtis.info/tisv2/a/en/e83-x3-2.0d-sav/repair-manuals/17-cooling/17-00-...
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Does the coolant gauge go up or down when there is no coolant?

My car nearly overheated where temp gauge just touched max temp. Does this mean engine damage? I thought that maybe the thermostat broke so i shut it down and drove later, but it turns out the ...
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The gas pedal stops responding after a problem with car heat

So the other day I noticed the car was getting hot and I knew it the coolant needed to be refilled. But the coolant cap was stuck so I thought I would just finish my errands and then take it to the ...
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583 views

Car suddenly stops accelerating and overheat indicator comes on

Vehicle: Skoda Fabia TDI 1.2L diesel While driving back home, the car suddenly stopped accelerating and the RPM was stuck at 1000, even when I applied more gas. Immediately after, the overheat ...
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block test positive but leak down doesn't find any issue

My Jeep has been losing coolant before and after replacing a leaky radiator. block test proved positive for combustion gases but the dealer doesn't find an issue with leak down test. there is not ...
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Coolant fluid being consumed up fast (1.5 liters in just two to three days)

My friend owns a VW Golf Mk4 1.6 SR year 1998. Recently he is having issues with the coolant fluid being consumed up really fast, approximately 1.5 liters in just two to three days. The first thing ...
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Car running hot - bottom radiator hose cold

Have a 2009 Subaru Forester XT 5 speed manual. The cars temps are running high. 98c while driving at about 100km/h. Temps will drop to 80c very quickly if the car gets into higher rpms. Ie 4000rpm. ...
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Left car running, coolant gone, engine overheated

Car: Hyundai Sonata Hybrid Yesterday, before going into work I forgot to shut my car off. That was at 9am. Around 1pm, I received and email that my car was running so I went out to shut it off. Once ...
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chevy trail blazer 2005

I have just been putting water int he radiator (there is a leak) and ignoring the dex cool - so you put water in the radiator in the front of the engine and then put coolant in the other one (back ...
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2000 Oldsmobile Intrigue disconnected coolant hose

We got this car really cheap from a friend since it leaks coolant (it runs out in about ten minutes of driving). My wife noticed the other day this hose that is not connected to anything (shown below) ...
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Should I flush cooling system before or after water pump replacement

I recently replaced the water pump on my car as part of a restoration project. The old pump is still good and now that I want to conduct a cooling system flush I understand that I should reinstall ...
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Would pressure testing indicate leaks from the coolant hoses?

If you do a pressure check, would bad coolant / radiator hoses cause the test to fail? I have had 2 mechanics trying to figure out why I am losing cooling fluid. Pressure test didn't turn out any ...
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1k views

Topping up Coolant bottle with Distilled water only or pre-diluted coolant?

I am using pre-diluted (50:50) coolant in my car. I have observed that with passage of time and use (around 4 month), coolant quantity in reservoir bottle decreases to middle of MIN and MAX. I have a ...
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When doing an “Engine Coolant” and “Inverter Coolant” change. Do you use the same coolant type for both?

Well I got my 2011 Toyota Prius oil changed and the dealer wants me to pay $500+ to get both the Inverter and Engine coolant changed. However I feel I'm up to the task for a fraction of the price. ...
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Mixing antifreeze and coolant

My son bought coolant instead of antifreeze and put it in his vehicle it was the same color, will this cause is problem?
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What are some effects of higher than usual cooling system pressure?

This is a follow on to this question where I asked how A/C could be causing coolant loss. The answer was that using the A/C can cause higher than usual cooling system pressure, which could result in ...
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How can an A/C system consume coolant when in use?

I drive a 2007 Subaru Outback. Recently, I've noticed that when I use the air conditioning, my coolant level drops ever so slightly. The rate of loss seems to be related to the amount of time the A/C ...
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Water instead of engine coolant? [duplicate]

Currently own a Vauxall Corsa (diesel), that is seemingly leaking engine coolant. Having bought over 3 bottles of coolant this week, and having to fill it up constantly, I will be taking it into a ...
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How often and how thorough should a coolant flush be?

I have a 2005 Mazda Bounty UTE. How often should it have a coolant flush? I have since seen videos which suggests a flush should be a number of cycles of empty, new water, empty, new water, empty etc ...
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463 views

Why did changing my coolant break my water pump

Many years ago I changed the coolant in my 1994 Mazda Lantis. I had no idea what I was doing, and the result was my water pump broke and started leaking. The mechanic replaced it and all was good. ...
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Hi I’ve got a 2013 insignia 2.0CDTI coolant problems

Coolant warning message keeps coming up on dash checked level ok replaced sensor but message keeps coming up help
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492 views

Coolant leak passenger side on floor

2009 Journey has coolant on floor of garage on passenger side. Car doesn’t overheat but had to add coolant to the reservoir. Mechanic can’t find leak.
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Will driving with less coolant cause any problems?

Let's say the capacity of the cooling system is 7 liters. Lets say you have 1 liter in there. Besides the fact that if you have a leak or it evaporates you will have less time, is there anything ...
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Why do you people run distilled water on cooling system and flush it, is it neccesary?

I'm trying to change coolant on my car. I saw a video of my car where they drained the existing coolant, added and ran distilled water, drained it and then finally added coolant. Why are they doing ...
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Light White water vapour like smoke from exhaust continues throughout the journey

I have a Make:Vauxhall/Opel Model:Corsa EngineSize: 1.4 Registered in year: 2012 FuelType = Petrol A day before I noticed a light white smoke from the rear view mirrors and I was already an hour ...