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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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2003 Honda civic engine overheat mystery

Car runs fine. No over heating until I turn up the passenger heater control then Engine temp gauge goes up. I Turn off heater, engine temp goes down. Heater works fine. There are no leaks. No lose of ...
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2k views

How long should I wait for engine to cool down before I can check coolant?

I know engine temperature should go down to "C" mark before opening radiator cap. However I'm finding that the temp just stays on normal for a long time. I think I've read people say you need to give ...
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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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38 views

Am I losing coolant during driving?

I have a 2007 Mazda6 with 3.0L V6. I had coolant changed while in for routine maintenance two months ago. Since then I have noticed the radiator fans running under conditions that they never did ...
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2answers
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Mazda6 radiator fan runs after car turned off

I have a 2007 Mazda6 with the 3.0L V6 that I have owned since new. This (extraordinarily hot) summer I noticed for the first time that the radiator fan runs for 5-10 seconds after I turn the car off, ...
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What would cause radiator fluid to leak from the front of the car but not drip on the ground when part?

Slewed is on the front grill of the car and I can see it when I shine a flashlight by the radiator cap but it is not dripping on the ground.
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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
49 views

Driving Subarus without coolant [duplicate]

Years ago I decided to drive a Brat from Wyoming to Indiana. It started losing coolant climbing the Bighorns. I kept on driving. By the time I left Wyoming their was no coolant in the system. It didn'...
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2answers
108 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
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1967 f100 water not flowing through radiator

Water isn't flowing through radiator unless you press the gas pedal, acts like its running hot but temperature gauge never shows it going above normal . Thermostat is new and temperature sensor is new ...
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Vibrate with humming sound

I recently notice there is vibration with humming sound coming from my 2017 Nissan Pathfinder. When I start the car and leave it idle I don't hear any vibration with humming sound from front driver ...
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Faulty cooling system but not overheating

I've got a Peugeot 2.0L HDI 2003 over the past several months I've had issues with the cooling system, it hasn't overheated until recently but has had other issues. It first started showing signs ...
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3answers
109 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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0answers
60 views

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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2answers
83 views

Is it possible for air to flow too fast through the radiator? My engine runs hot at 75 mph but not a 60 mph

My vehicle is a '97 Jeep Cherokee XJ with the 4.0L straight-six. I'll try to keep this as short as possible, so I'll just ask that you please assume that there is nothing wrong with the cooling ...
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Question and history on a 07 pt cruiser

Having trouble with cooling on my 07 pt cruiser. Had the water pump, radiator, thermostat and radiator cap replaced. When my wife drives it, it will heat up and fill the overflow reservoir up to the ...
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1answer
54 views

Resting a radiator on metal brackets

I have recently replaced the radiator in my 2006 Pontiac g6 GTP 3.9L. While installing the new unit I neglected to install the rubber feet between the rad and the frames lower bracket, which the rad ...
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1answer
148 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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0answers
37 views

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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1answer
198 views

What happens with excess coolant after performing BMW electrical cooling system bleed?

I replaced a leaking hose on my BMW X3 2008 and attempted to bleed the cooling system according to these instructions. Do not open the coolant expansion tank cap during the venting procedure. ...
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0answers
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Cooling system blockage in block or heads?

Hot water is entering the passenger side of the radiator, but no hot water is entering the inlet side of the radiator. I've replaced the radiator, water pump, and thermostat. The truck is a 1994 ...
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2answers
61 views

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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2answers
1k views

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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2answers
120 views

Why does my Honds Fit Sport overheat?

I have a 2007 Honda Fit Sport. The car has been overheating. I have taken it to all the good mechanics, yet the problem persists. When on a highway at speed up to 100 (kph?), the car starts to ...
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29 views

Why does my automobile air conditioning stink when I turn it on [duplicate]

I read all over that the problem is mildew or antifreeze, but why doesnt it stink when I'm just blowing fresh air and the compressor isn't on? Seems to me that if it's the air ducts, for lack of a ...
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Possible Refrigerant leak on 05 Honda Accord EX

I just added Refrigerant and after adding it I’ve noticed a mist coming out in front of the radiator. I’m thinking it’s very possible that I have a serious leak. I guess I’ll find out soon enough when ...
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1answer
49 views

Disconnected sensor harness and car is now leaking coolant. Related?

A mechanic replaced BMW X3 2008 cracked coolant reservoir. Car was running fine for several months. Recently "low coolant level" light came back on. I refilled it with more coolant. However, now it ...
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1answer
112 views

Sign of blown head gasket

I just replaced the water pump new and took out the thermostat because it was stuck closed and didn't have the 40 bucks for a new one yet. When I had the van engine running and normal temp between 185 ...
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3answers
57 views

No thermostat, but still running hot

Have a 2001 Mitsubishi eclipse. The thermostat was taken out but the car is still running hot. I've checked the coolant level and it's full. Don't know what else to do.
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1answer
60 views

Part no: coolant flange/elbow

I have an '04 1.2L 16v Renault Clio Dynamique with a leaking coolant flange/elbow where the lower coolant line connects to the water pump. You can see where flange is in relation to the pump and ...
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3answers
3k 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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What could cause these warning lights and smoke?

This is a 2006 Toyota Avalon. The charging system warning light and automatic headlight leveling system warning came on. I made it home and there was clear smoking on the left side. What do you ...
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1answer
199 views

Cooling fan comes/stays on when not needed

Car is a 2012 Mitsubishi Galant. Went to drive it one day and the battery was dead. Totally dead. Car fob wouldn't work, lights didn't come on, and turning the key didn't even make clicking sounds. ...
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1answer
1k views

Diagnosing a blown head gasket - can I use a compression gauge?

My '97 Jeep XJ Cherokee w/ 4.0L inline-6 engine runs a little hot and it overheats when driving on the highway for longer then an hour. The coolant temp slowly creeps up until it boils over. I've seen ...
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2answers
51 views

Can a year-old oil-in-coolant situation fix itself?

So a year ago I took my 2003 Buick Century Custom to get an oil change. The mechanic there told me he found oil in my cooling system and that I should start looking for a new car. I moved out of town ...
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2answers
2k views

Engine coolant hot, but oil temperature normal

This afternoon, I left my 2012 VW Beetle 2.0T idle for a few minutes at a gas station, and it showed a hot coolant temperature warning; the sensor was reading 195F. It was an unusually warm day for ...
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1answer
47 views

Leaking water hose 99 mazda 626

What hose is this? Leaking water 99 Mazda 626
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1answer
693 views

Bubbles in radiator despite several cylinder head overhauls

I have a Nissan FB13 Supersaloon. The car started having radiator problems when the radiator was blocked. After repairing the radiator the engine started building pressure and you could see bubbles ...
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1answer
43 views

Does the coolant shorten the life of radiator? [duplicate]

My car is running on pure distilled water in its radiator. No winter here, so freezing the coolant wouldn't be a problem. It is running on pure water because I'm the 2nd owner and by the time I bought ...
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1answer
27 views

Throttling valve speed in a refrigeration cycle

I'm trying to understand the general refrigeration cycle which includes a throttling valve for the freon that is controlled by a stepper motor which is done by a temperature control. I was wondering ...
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0answers
100 views

oil in my cooling system liquid is my TURBO damaged

I have a kia forte 5 sx 2016 with about 31000 miles on it. Last week the 4 spark plugs broke. I've got them changed under my guarantee. I knew something was wrong but the dealer didn't want to look ...
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0answers
11 views

Jeep temp sensor

I have a 2005jeep wrangler TJ What type and size wrench do I need to remove the engine coolant temp sensor. I blew a P0128 code. Thanks,Bob
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1answer
323 views

Should I open the radiator cap in extreme cold

I have a 1.6L petrol Peugeot 307 (2001) that normally is driven in the south of Sweden where temperatures are typically greater than -10 degrees Celsius, but am now in the north where temperatures can ...
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4answers
2k 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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1answer
48 views

I have a broken impeller on a water pump 2002 Mitsubishi Galant

When I took out the water pump I seen that the impeller was broken and it was no peaces that fell out what should I do
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2answers
154 views

Crud in Coolant Expansion Tank

I have all this brown/orangish mineral crud in my coolant expansion tank. I've flaked some of the more substantial deposits off as you can see in the last image below. Is it something I should be ...
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1answer
97 views

Trouble with overheating - coolant boiling while trying to burp system

I've got a 95 Acura legend with cooling issues. I recently replaced a cracked radiator and the thermostat while i was at it, but the coolant is boiling before the thermostat opens so I can't burp the ...
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33 views

Mitsubishi eclipse spyder

My car did not have a thermostat and would get slightly hot when stopped. I just bought a new thermostat and installed it. Now the temp is higher and will not drop even when in motion. Also found out ...
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0answers
247 views

Problems in Radiator of Mahindra Bolero

It is noticing every morning when I am going to start the engine of my Mahindra Bolero, that the radiator is producing air when I used to open the cap of radiator and throws coolant. What is the ...