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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1answer
28 views

What damage could cause by broken coolant resovoir cap?

My Honda jazz coolent resovoir cap broken. I'm planning to replace just the cap by myself. What damage could cause by broken cap besides overheating ? Do I need to do coolent replace ? Is air could ...
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1answer
593 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
24 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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Will an electrical cable tie secure a rad hose for 20 kms?

In an emergency to get one home etc, would electrical ties hold a rad hose on, if one of the hose clamps broke? Cheers
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22k views

Coolant boiling and smoke coming out of engine bay

I have a 1995 Toyota Camry SE that has 195,000+ miles that has started to develop some serious problems. Aside from what I believe to be an issue with the transmission, the car had been running ...
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1answer
54 views

Rubber pieces found in engine coolant

ISSUE: I found small pieces of rubber debris in the coolant. They are a little smaller than part of a fingernail clipping. The rubber hoses have flaking rubber when inspecting them on the inside. ...
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3answers
18k views

Car temperature drops to a little less than 1/4 at highway speeds. Any reason to be concerned?

Car is a Mk1 Golf. Driving around town the temperature behaves normally - it sits at the middle of the gauge, sometimes goes a little higher if I'm sitting in traffic but not much. However, on the ...
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2answers
47k 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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3answers
3k 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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1answer
58 views

Why did my temperature go down when I turned on A/C?

My car has been running hot and I'm going to be putting in a Thermostat to fix this. However, I have noticed that when I turn on my Air Conditioning, the temperature goes down. I would expect ...
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51 views

What's this loose o-ring in radiator neck?

2002 Toyota Corolla. Changed out the coolant on our friends car to find a beat up square rubber o-ring loose in the radiator neck. Photo below with it resting on the radiator. Please advise if this ...
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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
56 views

How can I tell if my radiator is bad?

I have a problem with overheating (1988 Honda Accord CA/LXi). I've replaced the water pump, radiator cap and thermostat, with no change. I've flushed the system and the coolant came out clean. There ...
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1answer
51 views

Are some engines produced without coolant overflow containers?

I bought a used mini excavator (Terex HR1.6). I followed the overflow hose from the radiator. It ends in free air – i.e. no overflow tank or valve or anything. I have the machine's manual, and I can'...
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302 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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3k views

What is causing Mazda 3 overheating and cold heater?

I have a 2006 Mazda 3 s with 167,000 miles. The engine is overheating and the heater stops blowing warm air soon after starting the car. I replaced the thermostat to no avail. I took it to a radiator ...
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1answer
237 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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5answers
6k views

Oil vs Coolant Temperature

Could an engine be run dry, as is the case with solid blocks, meaning no coolant, if a sufficient oil cooler were to be installed? Essentially, if we could keep the oil temperature between 210 and ...
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2answers
65 views

Solution to hot water coming from radiator to the coolant tank

I have a Toyota Noah 2005 and after driving,hot water fills the coolant tank form the radiator hence always emptying the coolant tank and adding more to the radiator.Would like to know the solution to ...
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1answer
40 views

What is the chemical difference between various brands of coolant additives (SCAs) for the cooling system?

In the manual of my vehicle, CAT recommends using their SCA over others. Is this just marketing or do different brands create different SCAs that affect longevity/chemical interaction/etc?
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1answer
734 views

Loss of water in the radiator

The air conditioning in my vehicle began running hot at intervals, then I noticed that the temperature gauge began bouncing between the hot and middle mark. I was advised to change the thermostat and ...
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1answer
28 views

coolant query bmw

i know this can be a pretty generic question and would apply to all cars but I'm no mechanic so here it goes. i have a bmw 318 2007. I have recently topped the coolant up correctly so the float rises ...
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5answers
104k views

How to test if head gaskets are blown?

Is there a definitive way to test whether head gaskets in most engines are blown, without actually reaching for the gaskets themselves (at which point you might as well go ahead and replace them) ...
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0answers
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Coolant cycling too high and low after (motorcycle) accident

A number of months ago, I hit a deer while riding a 2018 Triumph Street Triple R (motorcycle). Since then, the motorcycle frequently drops a significant amount of coolant out the coolant waste tube, ...
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1answer
41 views

What are the effects of using sulfamic acid to clean a radiator that is plugged up about 75%?

I've got a 1991 school bus with a CAT 3116 that gets a little hot on the highway and the stop engine light comes on. Only the top 25% of the radiator gets hot while the bottom remains very cold. I've ...
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3answers
8k views

Why are the blades of car radiator fans unevenly spaced?

Fans that look like this: Is it to somehow help the balance of the engine?
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1answer
42 views

Audi 100 1990 Sedan,cooler hose bulging = distaster waiting to happen, right?

I must admit I haven't really paid attention to the coolant hoses, but today I noticed something. That coolant hose leading to the radiator doesn't look healthy with that bulge and there is also a ...
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3answers
10k views

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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1answer
44 views

Trouble shooting cooling system

Is this the water pump, or what? I have a 2008 Lincoln MKX and have been experiencing a leak from one of the hoses from the coolant tank or radiator for several months according to one mechanic. It ...
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2answers
2k views

Will an engine overheat if it has no coolant recovery tank?

My wife's Mini has a leak in the coolant recovery tank, and she has been told by the dealer that her car is at risk of overheating without the coolant recovery tank.Frankly, I don't believe it. Cars ...
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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
207 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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3answers
34k views

Why is coolant in the reservoir boiling?

This is a 2011 Chevy Cruze 1.4 L Eco with 116xxx miles on it. The other night I made it home from driving about 30 minutes from work and when I turned the car off I heard some noises. I looked under ...
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1answer
33 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
690 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
14k views

Coolant disappears from coolant reservoir but no leak observed

I just replaced the water pump in my 2005 Ford Escape V6. I discovered that each time I fill the coolant reservoir with coolant and drive the car, by my next stop the coolant reservoir will be ...
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1answer
3k views

How do you clean out blue devil (sodium silicate/liquid glass) out of your cooling system?

I poured blue devil engine sealant into my engine as a quick fix for my head gasket problem. It's made the issues worse now there is what looks to be white rock salt in my radiator and heater core and ...
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1answer
529 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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3answers
10k views

Should you change a thermostat when changing your water pump

Just got my water pump changed. Now my thermostat is trying to edge up. Should you change your thermostat when you change your water pump?
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1answer
63 views

Why does car get hot when at a stop light

Vehicle vibrates a little when at a stop and starts to overheat , once I get going the temperature starts dropping back to middle. What do you think the problem is?
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3answers
981 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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1answer
36 views

Can I use a lower ratio of coolant to water in a hot climate? (N. Texas)

I'm looking at a fluid flush for my 2010 Nissan Altima. I want to ask if there are concerns or benefits to using a lower coolant ratio. I travel to Kansas for the holidays, where it's quite a bit ...
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3answers
3k views

2002 Dodge Ram 1500 overheating

I have a 2002 Dodge Ram 1500 two wheel drive with a 4.7 liter engine. It's been overheating so I replaced the whole cooling system: I replaced the condenser cooling fan because its not coming on ...
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0answers
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Nissan Versa 2007 Coolant Change Problem

So I changed my coolant, online it said I need 6 ltr but it only took 5 and that was including filling the overflow tank to the max level, I had it jacked one side high and tried to burp it. I took it ...
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0answers
30 views

Does coolant have a shelf life? [duplicate]

I have found some old opened bottles of coolant (green, undiluted, aluminum safe) in my garage, they've been opened and partially used. The remaining coolant has been there for somewhere between 5 ...
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0answers
20 views

Elite i20 AC problem

My Hyundai Elite i20(2017 model) was running fine till I gave service in one of the hyundai showroom. Last week I gave my vehicle to service at authorised Hyundai showroom(odometer - 33000km). After ...
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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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3answers
3k views

If coolant evaporates, does the anti-freeze portion evaporate as well?

If it does evaporate, then how much in comparison to the water? If it does not evaporate, can I be safe to assume I only need to add water when replenishing lost coolant? Edit #1 I just want to ...
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7answers
49k views

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 ...