Questions tagged [coolant]

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

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133 views

In Columbus, Ohio. 28 degrees out for last 9 hrs. Only water in radiator.Can I start and drive safely?

99 Ford Windstar. I kept water in all summer or else it ran hot. Been trying to get antifreeze in through the top because I had no money to pay to find and fix problem, now since cooler outside, water ...
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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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5k views

What deteriorates engine coolant, Milage, age or both?

Basically what is said in the title, what is a bigger factor on the life of engine coolant? Is it mileage or age? Say someone were to cover around 30,000 miles a year however only changed his/her ...
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Astra H Oil found in coolant

What should I check/replace now? I already replaced a set of gaskets in the oil cooler. It did no help. Engine Z18-XER. Year - 2008. Nothing else happening. No white smoke, no external oil leaking, ...
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1answer
95 views

1999 Ford Ranger - Removing head gasket and found mystery coolant line (?) coming out of firewall. What is this?

I bought this truck broken and I don't know any of its history other than it has a blown head gasket. I've tried to be diligent about labeling things and it's possible I labeled this but the tape ...
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357 views

What is commonly used nanofluid coolant for automobile radiator

What is commonly used nanofluid coolant for automobile radiator ? And any specific reason for that coolant ?
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101 views

I put oil in the coolant by mistake in Chrysler 300c Hemi

I put a quart of oil in the coolant compartment in my 300c Hemi Chrysler engine. Can I drive it about 50 miles without hurting my engine to get my engine flushed?
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2k 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 lately)....
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3k 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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1answer
2k views

1994 Ford Escort won't start

I have a 1994 Ford Escort that was bought used 2 years ago. When we bought it, it would barely run, and we had to replace the engine head. As a result of that and other repairs, it has been losing ...
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1answer
50 views

Coolant flows straighr from rad to muffler?

Had my 2008 pathfinder towed last week it broke down and I thought it was a starting issue due to corroded post clamps, replaced those and it runs, but... now filling the rad the fluid runs straight ...
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6k views

Can a long road trip cause a loss of engine coolant?

I went on a long road trip not long ago and just recently my car told me to check the coolant level. I checked the level and it was low, however I can't find any signs of a leak. Could the level be ...
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9k views

50/50 Coolant mixing

I just replaced my radiator today and decided to refill it with coolant concentrate and mix in water myself. Instead of mixing the stuff properly before hand, I poured in 1/2 gal. of water directly ...
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1answer
11k views

Determining root cause for cracked BMW coolant reservoir?

Some BMW models are notorious with getting cracked coolant reservoirs. Yesterday I did a UV dye test to locate my leak and it appears that in my case coolant reservoir has one of these small hairline ...
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Should I flush coolant after using UV dye in coolant system?

While the O'Reilly Auto Parts salesman said that I don't have to flush coolant system after using Interdynamics 375CS Radiator/Coolant Dye I would still like to have second opinion on that here in ...
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1k views

Fixing vs replacing a radiator?

I have an 06 Impala LT that looks like it's leaking coolant near the front passenger door. I noticed it this morning when I saw a wet spot on my driveway. I didn't see any oil/transmission leaks but I ...
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7k views

Dominar 400 engine coolant level

I just bought the new Bajaj Dominar 400. When I got my bike the engine coolant level was almost half. After riding 200 plus Km the coolant level is just above the minimum marker and it has not lowered ...
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1answer
2k views

Could oily sludge in cooling system affect engine temprature?

I have a BMW 530i 2007, the engine gets hot up o 115 degree of celcius, it actually fluctuate between 95 to 115(which is a little bit higher than normal specially when the outside temperature is 5 c) ...
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1answer
2k views

Range Rover Overheating

I bought a 2006 LR Range Rover HSE 4.4 liter with 75K (no turbo). At the time of purchase, I had no overheating issues and just nominal tire fixes and some garnish enhancements that I decided to do. ...
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2answers
700 views

Coolant has oil residue

What is the probable cause of engine oil in the coolant? There are no performance issues but when I checked the coolant level, I noticed oil residue.
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1answer
409 views

1996 Mercury Sable overheating while idling

My car is overheating while idling at light. I have been driving it without a thermostat for about 6 months. I have had the water pump replaced and the reservoir. I have also replaced the reservoir ...
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1answer
2k views

Temperature gauge between half and 3 quarters?

I have a '98 Oldsmobile Intrigue and after about 20 minutes of driving the temperature gauge is between one half and 3 quarters. I was wondering if is this a problem? The coolant is at the right level,...
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1answer
822 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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14k views

What causes mud in my radiator?

Ive changed my oil about one month ago but just recently my check oil light has started coming on and I started losing my heat. I thought I might just have low antifreeze but when I opened my radiator ...
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1answer
36 views

Is it safe to flush it?

I've got a 1989 Chevy Cavalier sedan. 78,000 k. Previous owner let it sit for 7 years. I've drained and replaced the oil, fuel filter, hoses and such. But my coolant tank is completely encrusted in ...
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364 views

Honda Accord 03-07 CDTi leaking coolant, no drips, no steam, no mayo

My car is a UK Diesel Honda Accord 2.2 CDTi So I've had a problem with my car for about a week, it started overheating and not accelerating when I put my foot down on the accelerator (losing power) ...
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169 views

Car engine coolant system (radiator cap) air

I have only one question! So what I've heard, it's bad to have air left in the coolant system! So my question is, can air get inside the coolant system if I just take off the radiator cap to check ...
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1answer
117 views

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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1k views

Coolant water keeps boiling off every day

A mechanic worked on the compressor and he flushed out the coolant system and only filled it up with water. Afterwards, the coolant water keep drying up and I had to top it up with 2 liters of water ...
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2answers
131 views

Few questions regarding coolant

Checked my coolant level today and noticed in the reservoir it was lower than the “Low” line so I added 100% antifreeze which brought it up between the “L” and “H” marks as I couldn’t see properly ...
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3answers
3k views

Coolant temperature in truck does not get to operating temp

I bought a Ford with an unknown amount of miles. A 94 Ford ranger 2.3. runs better then you would expect, accept the coolant temperature. The first thing I did to fix the problem was flush the system, ...
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13k views

Coolant reservoir empty

2006 Subaru Outback, 2.5l NA, ~110k Had the timing belt, including water pump and some old, corroded hoses replaced about 3 months ago since it seemed overdue. Which I would assume if not a full ...
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1answer
279 views

Coolant heat storage system: can this be retrofitted?

Some cars (like the Toyota Prius) have a system where hot engine coolant is pumped into an insulated storage bottle. This can be used to heat the interior when the ICE is not running. I seem to ...
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7k views

What kind of coolant can I use for my 2006 Subaru Forester? Does color matter?

The coolant levels in my 2006 Subaru Forester seemed low so I was going to pick up Prestone pre-mix from the store and top it off. The coolant in my car is blue. The manual says SUBARU coolant or an ...
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1answer
3k views

What could be causing loss of coolant - crystals forming around expansion chamber

Vehicle is <12 months old Merc S350 diesel. Suffering constant loss of coolant. Clear signs of 'pink' crystals in area of water filler and associated pipe work. It is as if the coolant is being ...
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1answer
425 views

2003 Buick Rendezvous overheating without steam, coolant overflow at normal temperature [closed]

My car overheats to the max, the heater will not heat even in full blast. When the car overheats there is no steam or boiling coolant. The radiator has antifreeze and the reservoir is overflowing. I ...
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3k views

E46 rough idle with coolant light on

The car is 2001 BMW 330i. I have changed ignition coil, spark and IAC. Last week, my car experienced rough idle. Then I changed the coolant temp sensor today. After adding coolant and bleeding, the ...
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1answer
677 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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1answer
743 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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1answer
117 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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1answer
2k views

Mechanic Troubles And A Small Watery Oil Leak

My car is a 2005 BMW 525i E60 with about 180,000km on the clock. It has been well looked after and serviced. I don't get dealer services, but go to a mechanic who has always been good and uses the ...
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2answers
3k views

Where to add coolant in a 2003 BMW 325i?

I have a 325I 2003. I wanted to put coolant in my car and I started putting it in the reservoir. But I wasn't sure if that is where i put it so I stopped. Will it hurt if I put a little in the ...
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1answer
1k views

1995 Chevy s-10 4 cylinder running hot but not overheating

I am having an issue with my s-10. It runs hot but is not overheating. It started when I replaced the temperature sending unit and thermostat. I put in an additional thermostat to make sure the first ...
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0answers
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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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488 views

Why is my car overheating in the winter?

I am a novice when it comes to cars but I am trying to learn. Here is what is going on. Car 97 Acura Cl I replaced the radiator in the summertime and forgot to put coolant back in the system. After ...
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1answer
197 views

Rebuilt engine: cranks but lots of white/grayish fumes

So today I cranked the engine I was rebuilding (Skoda Estelle/120 '72, RWD, rear mounted engine) and while it started, yes, but not without some struggling, I got a lot of white or light grayish fumes....
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38 views

can antifreeze concentrate or get stronger in a vehicle with out loss of fluid level?

My wife recently went to get the oil changed in our 2012 Subaru Outback, when she went to pick it up the clerk recommended a radiator flush and refill as the coolant level tested at -65 degree's. Is ...
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1answer
161 views

2000 Honda prelude radiator issue

I was driving my Honda prelude and all of a sudden it shut down and wouldn't start again. I pushed the vehicle to the side of the street and opened the hood. The radiator frame where the hose ...
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0answers
946 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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1answer
11k views

Flat / collapsed upper radiator hose!

I have changed my radiator cap couple of months ago with an original OEM one. The older one had a broken sealant which caused engine over heating. Now, i have no heating problems but after the engine ...

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