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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2004 Saturn Ion Quick Connect from OEM

I've purchased a new radiator for 2004 Saturn ION and it came with quick connect fittings. My oil cooler lines require thread connect. Is there a way to switch them to quick connect, or is there a ...
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Why do so many diesel engines have problems with aluminum oxide in the cooling systems?

I have a bad case of aluminum oxide contamination in my 98 Mazda 626's cooling system. While researching the subject, and filtration solutions, I noticed that this type of problem is very common ...
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2005 Pontiac Grand Prix overheating

I have recently bought a 2005 Grand Prix V6 non supercharged. It overheats at idle and in park. I have had my head gasket and head resurfaced at Pepboys and replaced my radiator with a larger 1 inch ...
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147 views

Honda Civic 2002 Coolant sprinkles back from Rad cap

I am having issues with this car, so I am reaching out to masses out there who could share some of their wisdom to help me understand the actual issue with this car. It has 262K miles on it. Issue ...
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172 views

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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1998 Grand Cherokee 318 V8 losing coolant

I am constantly having to add coolant to my 1998 Grand Cherokee (318 V8); about 1L every couple of months or few thousand km. Exhaust is clear, consistently passes emissions tests, no puddles where ...
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2k views

Blue Devil affect on water pumps

I used Blue Devil Head Gasket Sealer on my 2006 Ford Explorer about 6 months ago, and it's worked. However, I am now noticing some antifreeze dripping on my garage floor, which seems to be coming from ...
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28 views

Coolant loss out of overflow of an 1980 c-10

I have an 1980s Chevy 305 engine. Was out for early morning breakfast and noticed coolant was coming out of overflow tank. The motor had not gotten warm yet. What could be causing it to overflow???
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420 views

Changing Freeze Plugs on a Mazda 626

On a 98 Mazda 626 4 cylinder 2L engine where are the freeze plugs and how hard is it to replace them?
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88 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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28 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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30 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
483 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
1k 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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110 views

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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1answer
895 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
864 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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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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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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Cooling fans only work normally with cabin fans on

2003 civic EX 1.7L automatic Hello, I am trying to help my friend with a really weird cooling fan issue. The cooling fans were not coming on and while sitting in traffic the car would overheat. ...
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109 views

Can a bad coolant temperature sensor or a bad wheel bearing hub cause my check transmission light to come on?

I have an 05 Ford Explorer Eddie Bauer. The check transmission light will come on and the o/d light will flash after driving it for a while. I know my rear hub needs to be replaced, but recently was ...
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coolant fans on 93 cadillac seville are not working

i tested the fans , they work ok, 50 amp fuse is ok and tested for power to it. ok, digital display is showing temperature as it rises, hit 220 and the fans do not come on....is there a relay ...
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1k 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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15 views

03 Blazer 130,000 miles

Hey guys in need for some serious help. After spending 2000 on repairing my 6 MO. Old truck (and not to an acceptable standard), i have a crack down the plastic part that holds in my radiator and im ...
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39 views

1976 Leyland Mini engine block coolant is blocked

Was doing routine radiator flush after engine overheated while on longer trip. Hasn't overheated on around town trips. Radiator coolant was clear green with no lumps or other material coming from ...
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32 views

temperature gauge on my Ford Focus keeps dropping to 1/4 when temperatures outside at below freezing

I have had my car into a mechanics shop under warranty numerous times over a 3 week span. My first initial problem was that my temperature gauge went from sitting in the normal spot (half way on the ...
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34 views

Car not staying warm in gear

I have a crystler 2013 town and country van. I changed out the thermostat and flushed the coolant. It will start to heat up in park but when you put in gear to drive only maintains heat for 10 miles ...
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1answer
32 views

Jeep Renegade 2015, engine temperature light

This might be very stupid but I only have this car since 2 weeks (bought used). Today I noticed, that one of the red lights on the spectrum of the cooler temperature measure is on. It is the one ...
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90 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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38 views

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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1answer
513 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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2answers
53 views

Reservior keeps blowing the cap and coolant

I have a 98 Volvo S70 T5 2.3L Turbo. I've replaced my thermostat, I know may head gasket is good because I've done the checks to see if its bad and the oil isn't Milkey, the cylinders when I replaced ...
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1answer
42 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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36 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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2answers
104 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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0answers
99 views

Overheating 2008 Subaru Outback

I have a 2008 Subaru Outback it started overheating and we change the thermostat and it continued to overheat even after burping it so we changed the radiator and all of the hoses got a new radiator ...
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398 views

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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54 views

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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93 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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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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0answers
729 views

Help! Too much pressure in cooling system

So I have a 1980 Buick regal with a Pontiac 265 v8 mated to a th200.. I am having issues with the cooling system. I have replaced a dozen thermostats and 3 radiators. and 3 aftermarket coolant temp ...
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0answers
74 views

Radiator Fan On to Off Ratios by Temperature and Humidity

In an answer to another question, @FredWilson made the following comment: At idle expect to see the fans off much longer than they are on in a normal system. The ratio of off to on depends on ...
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58 views

Engine Runs Cold Nevers warms up above 1/4 way. 1995 Chevrolet G20 4.3L V6

1995 Chevrolet G20 3/4 ton Van 4.3L V6. The van never runs any warmer than 1/4 on the instrument panel. I have replaced the thermostat twice. Same issues. I have replaced the temperature control ...
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53 views

97 Suburban overheating

Lower radiator hose is hot upper radiator hose is cold and thermostat has been removed but it still overheats, water boils out when the radiator cap is removed. It overheats while not moving, as well ...
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639 views

Found a cut hose

My 1992 Lexus ES300 has been leaking fluids really bad lately, which it never did. I believed some foul play was involved due to certain individual whom I live with. Anyhow yesterday I was just ...
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153 views

2005 Subaru Legacy Outback 3LR g H6

Tried burping radiator with no success. Water boils out but temp gauge reads normal??? 2005 Subaru Outback 3.0 H6.
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28 views

On cars with 2 Thermostats, how exactly does coolant flow through the block?

How does the coolant flow in each of the following 3 cases: 1) both stats closed, 2) stat at the water inlet open (nissan calls this stat the thermostat) 3) both stats open (nissan calls the stat at ...
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10 views

95 Integra Temperature dashboard gauge

A mothballed Integra was started after 12 months of hibernation with a new battery. Vehicle was allowed to idle 3 minutes before taking a short run to the gas station (4 miles). When returning, the ...
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18 views

Toyota Prius 2013 (XW30) Coolant Expansion Tank Black Plug

Recently a friend of mine got used Toyota Prius 2013. And after driving it for a few days he noticed that the coolant is below the minimum. Topped it up but few days later it's gone again. It seems ...
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24 views

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, ...