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Questions tagged [cooling-system]

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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Is it okay to add straight anti freeze to an engine?

I was reading online and found a few people saying you should never add concentrated anti-freeze to a cooling system. you should only dilute what you already have in there with water and only add anti-...
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My toyota vios 2008 green temp light keeps blinking when switch on and car won't start. How to fix this?

My toyota vios green temp.light came on and the car won't start. The cooling fan keeps on running . But everything seems to be ok. I replaces the etc sensor but stil it won't start. Any idee what the ...
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1answer
29 views

How to flush a cooling system after head gasket failure?

I recently replaced the head gasket in my Renault K9K (700) 1.5 DCi, due to a cylinder/cooling system type failure. As such, the cooling system is full of partially burned diesel. Despite having ...
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Consequences of adding Blue Devil headgasket sealer to a car with no obvious problem?

I was doing some general internet browsing and stumbled across Blue Devil head gasket sealer which advertises permanent fix to any head gasket leak. The reviews on the internet also seem to be quite ...
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32 views

Engine coolant not hot

Recently bought a 85 bronco ll with a 2.8 motor. Engine coolant won't reach normal temp. Changed the thermostat, flushed and refilled coolant, but still had the same problem. Replaced radiator cap, ...
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17 views

2006 Hyundai Trajet G4GC engine not getting hot enough

This is a 2.0 petrol engine. Already had the t'stat replaced twice. When the car is stationary in the P gear, the coolant temperature gauge will slowly reach 40-45% of the scale and stays like that. ...
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2answers
206 views

Pontiac Grand Prix 2007

I noticed lately that on my dash engine heat goes close to hot but never really gets there. That usually happens when i am in idle. When i start driving it goes back to normal and only sometimes goes ...
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3answers
122k 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 ...
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2answers
47k views

Temperature gauge needle is on Hot, but engine is not overheating

car is a 1996 Honda Civic EK hatchback. B16A2 DOHC VTEC engine. Currently has 204,000 kilometres (127,000 miles) When the car is on a stop and idling, the temp gauge needle goes up steadily, and when ...
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1answer
2k views

Honda civic 03 overheating, checking the cylinder head and block for cracks?

I have 150k on my 03 Civic it has overheated several times. I can drive the car around town without it overheating, but when I drive it on the highway for an hour and it will overheat. I thought I had ...
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1answer
87 views

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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1answer
26 views

2011 Chevy Silverado Engine Temp Fluctuates when cabin temp set high

I have a 2011 Chevy Silverado 2500 with a 6.0 L. I never noticed this before because I was living in the south and never really had to increase my cab temp too much. Well I just moved to northern MI. ...
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1answer
44 views

What actually happens when there is no Thermostat ( bypass thermostat)in coolant system?

What actually happens when there is no thermostat (bypass thermostat) in coolant system?
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1answer
421 views

Overheating 2009 Nissan Cube

I have a 2009 Nissan Cube. A few weeks ago the car overheated and I realized that it was out of coolant. I added coolant and a week later it overheated again. I realized that the Radiator was leaking ...
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3answers
23k views

Overheating at idle - mechanic says head gasket

My car has been overheating at idle after a long period of time - perhaps 20-30 minutes in traffic. If I drive, it immediately starts to cool down again. I don't drive often so it hasn't been an issue ...
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0answers
14 views

Coolant smell outside of car

I have a 2010 Nissan Murano. Last summer (2018) I started smelling coolant when I get out of the vehicle or am at a drive thru with my window down. There is never any coolant on my garage floor. The ...
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1answer
110 views

How should I flush out a head gasket sealer?

I purchased a 2002 Ford Taurus, little knowing that it had a head gasket leak. After it was driven for a week or so it started overheating. I am assuming that the person that I bought it from put ...
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1answer
28 views

Car over heating when idle

My Mazda 6 started overheating during a heavy traffic day. Ever since, I noticed it would only start over heating only when the car is idle at a light, traffic, or parked for about 5 minutes and then ...
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6answers
311k 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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3answers
759 views

VW Polo strange issue of overheating

can I kindly ask your opinion on my car issue? I'm not deep in field of engines and this problem is causing my serious headache and a total waste of cash without any results. I've a 2015 VW Polo TDI. ...
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1answer
7k views

Coolant pressure issue

I am in need of some assistance. I am having a coolant pressure on my 1.8 16v clio. (Renault), coolant, cooling-system, overheating (car maintenance) In that when left to idle and engine gets up to ...
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1answer
281 views

Blown head gasket? (Decent compression numbers but cooling system doesn't hold pressure, no external leak)

I have a Mazda MX-5 and it was overheated due to the water pump belt failure. I replaced the belt afterwards and the car drove fine. I brought the car to the shop and they told me it has head gasket ...
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1answer
16 views

2007 nissan pathfinder

-I've went down the list,basically a process of elimination,ive changed water pump,thermosatat,flushed system, changed hoses,camshaft senser,flushed heater core,changed heater core sending unit,and it ...
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0answers
74 views

Why may heating gradually stop after some time driving (and doesn't work in passenger side at all)?

This is a somewhat strange problem. Heating (in driver side) seems to work normal - after somewhere between 15-25 mins. driving or so, it gradually stops working. The warming in passenger side doesn't ...
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0answers
13 views

Mini cooper 2003

Hi I have an issue with my 2003 mini. Temp is only running at quarter and after a while if I am stationary it will go up to half way and no further, but when it his halfway it will make a farting ...
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1answer
2k views

How to diagnose low water temp on Mini Cooper

My coolant temp looks like this: It fluctuates, but never really goes much higher than the first bar. It's not really been a big issue for me, better cold than hot, however the cabin heater has ...
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2answers
46 views

1990 Honda Accord Overheating

First let me state I've been an Auto Tech since about 1967, so this is kicking my butt. I've replaced the water pump, radiator, lower hose, thermostat, fan sensor, coolant sender, engine temperature ...
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3answers
2k views

Radiator has a leak and the upper hose is clogged, car does not overheat. White smoke from upper hose

My car is a 2003 Buick Century and it has been leaking for the past few months (puddles of coolant under the car). Now the car begins to have white smoke coming from the engine and it has a sweet ...
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0answers
16 views

Air Bubbles In Radiator Geely LCX 1.3

we have a Geely LCX 1.3. The radiator blew a few months ago and we immediately stopped driving it. First we had the head skimmed and pressure tested and replaced the gasket and also had the radiator ...
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3answers
7k views

Consistently losing coolant, but no overheating

Hi I’m new on here and I could use some help. I have a 2006 Nissan Maxima and I can’t figure out what is up with my coolant system. To start I replaced my motor with a good used JDM but before ...
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2answers
34 views

2000 Ford Expedition XLT 5.4, Possible Toast Heater Core?

I recently just flushed my heater core on my 2000 Expedition. I did a full flush, then a reverse, then another flush. Filled heater core with anti-freeze to insure air didn't get trapped in the core. ...
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1answer
53 views

Mazda 3 SP leaking coolant

I have a Mazda 3 SP 23 2005 _ manual _ 2.0 Liter unleaded. I have noticed that some cooling liquid started leaking on my parking spot a week ago. The leaking stains are becoming bigger day after day. ...
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5answers
139k views

Why would there be transmission fluid in the water overflow reservoir?

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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1answer
24 views

99 Alero overheated due to low coolant, coolant light stays on after filling coolant

I was driving my 99 Alero and it started to overheat quickly like went from normal temp to red line in about 90 seconds. I shut the heat off and it dropped back down. Then the coolant light went on. I ...
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0answers
12 views

Heat Indicator Light

Hi I have a 2004 Mazda 3 its been really cold the past couple of days so I don't know if that could be the reason for it but whenever I turn my car on the past couple days the engine overheating light ...
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2answers
200 views

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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0answers
24 views

Drove exactly a mile on water in the reservoir. Overheating after coolant added. What could be the problem?

So I drove to the gas station to put air in my tire when I realized I forgot to clamp down a coolant hose going to radiator after working on swapping the alternator. My hood was steaming and there was ...
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1answer
23 views

2008 equinox doesn't have heat on idle and very little driving

getting very little heat while driving and idle if i turn up fan inside car goes cold, temp gauge goes to half and stops, also getting a noise like a loose belt but once the car is warm noise stops?
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4answers
81k 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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2answers
38k views

Will a radiator suck fluid out of the overflow tank if I didn't fill the radiator completely?

I recently changed the engine coolant in my 2006 Prius. The system is the type which has the radiator cap on the radiator and a separate overflow tank. The whole system yielded about 1.5 gallons of ...
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1answer
41 views

Poor heat inside of car and loosing coolant from reservoir and radiator

2008 Subaru forester. I have to add coolant to reservoir every 50 miles or so. I get very little heat from inside the cars vents. I don't have any oil loss or any water in the oil. I have not been ...
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0answers
16 views

Mazda 323 Lantis

Good Morning Mazda 323 when cold dosnt start unless you keep swinging the engine and giving it gas, after it is warm up, u can start at anytime, as long as it is warm, why is this?
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4answers
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Should I use the heater while warming up my car?

I know that you should drive off immediately to warm up your car as your entire car will warm up faster this way. However, the common practice to defrost the inside of your windshield is to blast the ...
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3answers
843 views

Why is antifreeze mixture not as stated?

To keep things short I poured 200ml of concentrated genuine ford super plus premium antifreeze (Ethylene glycol based) within a bowl. Then added 200ml of water to dilute the solution to a 50/50 ...
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0answers
24 views

94 Chevy k1500 5.7L coolant gushing

I have coolant gushing out of the bell by the firewall. I replaced the heater core (luckily very easy in this truck). There are no leaks other than from that peep hole. Not on the floor boards and not ...
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2answers
16k views

Bent radiator fins — how many is too many?

Hi I thought I fixed some previous overheating problems but I only helped them. My car was running fine when it was 95F or so over the weekend but now it's 110F outside and my cars cooling system isn'...
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3answers
764 views

How to remove the rear heater on an Econoline

So I'm currently in the process of gutting a 2005 E350 (a former wheelchair van with a raised roof) to turn it into a camper van. As part of this process, I went about removing the back heater. In ...
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1answer
27 views

2008 Pontiac Vibe

I replaced my thermostat a week ago and it’s been fine now there’s no heat and my temperature goes up and down my heat will work for a minute or two then back cold do I need a water pump or what
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0answers
21 views

Fan not working and overheating for my Saturn

I currently have a 2003 Saturn lw200 2.2l and recently discovered it overheating and found that fan has not kicked on. I was conflicted and did some research and found out about troubleshooting the ...
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1answer
323 views

Can the weep hole of a water pump face upwards?

I've noticed a hole on the top of my water pump, and it looks like the pump's weep hole, since it also has some dried up coolant residue inside (but it isn't leaking any coolant, since the area around ...