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Questions tagged [thermostat]

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11 votes
5 answers
138k views

Car won't reach operating temperature

Here's a seemingly simple problem - I noticed that the temperature gauge of my mother's 2004 Opel Meriva 1.7CDTI won't ever climb above minimum. I checked the OBD readings to see if it was a defective ...
I have no idea what I'm doing's user avatar
8 votes
2 answers
20k views

How does the thermostat work?

What happens when the thermostat is stuck open or closed? How does it work?
George's user avatar
  • 6,545
7 votes
2 answers
1k views

Thermostat behavior and failure modes

If Zaid's excellent How can I test my thermostat? is "Thermostats 101" then this might be the beginning of "Thermostats 201"… My VW Jetta TDI (diesel) has been running cold (about one or two marks on ...
dlu's user avatar
  • 14.5k
6 votes
4 answers
16k 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?
user23699's user avatar
6 votes
2 answers
36k views

How can I test my thermostat?

How can I tell whether a mechanical thermostat works as it should? Is there a test that can definitively tell me if a thermostat is good or bad?
Zaid's user avatar
  • 39.2k
6 votes
3 answers
10k views

Does overheating that goes away under high RPMs indicate a sticky thermostat?

Sitting in traffic, my car's thermostat goes up to the red. If I put it in neutral and rev it, it goes up a tiny bit, then suddenly drops back to normal. Is that the thermostat sticking, or something ...
user avatar
6 votes
3 answers
18k views

How to know when thermostat is open?

Is there a way in modern vehicles to know when the thermostat is on vs off? Is it possible to tell when you don't have access to under the hood, IOW when you're driving?
amphibient's user avatar
  • 6,663
6 votes
2 answers
37k views

Should I use both gasket and silicone sealer or only one on thermostat?

Sorry If this is a stupid question but I'm a noob with mechanic work. I am replacing the thermostat on my 98 Nissan 200SX. I bought both a gasket and blue rtv silicone made to make or seal your own ...
Cam Jones's user avatar
  • 165
6 votes
1 answer
13k views

Cooling system flush procedure questions

I am going to do a cooling system flush and after some reading and watching some YouTube videos I noticed that people take different approaches. So I have the following questions: I understand that ...
Viriato's user avatar
  • 243
5 votes
2 answers
203 views

Why don't thermostats have a sensor?

One of the more common reasons of overheating is a stuck thermostat. One of the most common reasons for blown head gaskets is overheating. One of the most expensive vehicle repair procedures is head ...
amphibient's user avatar
  • 6,663
5 votes
1 answer
1k views

what in the thermostat opens when it reaches a certain temperature?

what actually opens when it reaches the certain temperature, is it the spring or is it the copper, or does the heat of the engine make the spring softer allowing it to come up and let coolant start ...
Caden Green's user avatar
5 votes
2 answers
6k views

Vauxhall Corsa 1.3 CDTI Thermostat replacement?

My Vauxhall Corsa 1.3 CDTi 2011's thermostat is stuck open so I am going to have to buy a new thermostat, the problem is I have no experience with car maintenance or repair, I haven't been able to ...
Kieron606's user avatar
  • 195
4 votes
2 answers
3k views

Rhythmic clunking sound somehow connected to the thermostat I just had replaced

I Bought a 1996 GMC Sonoma Oct. 2014. that winter when I was not getting heat I had the thermostat replaced which brought on a loud rhythmic clunking sound. Seems to be most noticeable when braking to ...
Mark's user avatar
  • 41
4 votes
1 answer
2k views

Suzuki Swift running cold - replaced thermostat and the issue persists

My 1994 Suzuki Swift Sedan 1.3L with 280,0000 miles has been running cold for a while now. I can't get my self warm with the heater in the mornings when there is frost. It surges climbing up a ...
Tiger Blood's user avatar
4 votes
1 answer
1k views

Thermocouple vs Thermostat

Why don't modern engines use a thermocouple (electronic temperature sensor) instead of a (wax element) thermostat?
voices's user avatar
  • 366
4 votes
1 answer
283 views

Saturn ion 2007 Temperature gauge

My car temperature suddenly drops down while driving and won't move until I remove the battery and put it back... What could be the cause pls? I have change the engine coolant temperature sensor or do ...
Habeeb Adewale Ajiboye's user avatar
4 votes
2 answers
12k views

2002 Honda Civic Overheating -

So I have a 2002 Honda Civic Lx. I’m not really too shabby with this car thing. We have changed my thermostat. My dad has replaced one of the hose. The system has been flushed. I don't know what's ...
Monique Gibson's user avatar
4 votes
1 answer
3k views

Is a "coolant housing Ieak" coming from the housing or thermostat?

I have a 2010 Mini Cooper S and my coolant is leaking. Only way I know what it is is because you see a small liquid puddle under the car. There is no odor. When I took my car in for oil change I was ...
Benji7's user avatar
  • 41
4 votes
1 answer
101 views

1995 Pontiac Grand Am Over-Heating and Cold air from heater, why?

My grand am is over heating while idling, blowing cold air out from heater and bubbling in coolant resevoir. Replaced thermostat and water pump and bled the valves to get air out and still same thing. ...
James's user avatar
  • 41
4 votes
1 answer
8k views

'05 Accord - No heat; changed thermostat

Alright so here's my problem. My 2005 Accord does not have HOT heat coming from the blowers. Sometimes it blows warmish. I just changed my thermostat today, and when I drained my radiator, the ...
Josh's user avatar
  • 41
4 votes
1 answer
3k views

2004 Accord No Heat

My son has a 2004 Honda Accord EX 2.4L. The interior heat stopped working and he can't defrost his windows in the morning. Here are the things I've done to fix the problem: Replaced the thermostat ...
G. Mill's user avatar
  • 41
3 votes
2 answers
5k views

Effects of anti-freeze concentration on engine temperature

I am curious as to how useful the engine temperature sensor actually is. It tells you the coolants temperature obviously, but I have read that the engine actually operates hotter than the coolant. For ...
ceefax12's user avatar
  • 1,242
3 votes
2 answers
26k views

How to change a thermostat on a 2007 Pontiac G6

Is it difficult? How do I know the exact location? Just purchased a replacement but I want to make sure I'm opening up the right compartment. 3.5L V-6 This is a picture of what I believe it is.
munale's user avatar
  • 113
3 votes
1 answer
1k views

Changed thermostat but now constant leak around thermostat housing

I went to flush my cooling system and change the thermostat on my Mk1 Golf. All went fine until I put the new coolant in. There is a pretty steady leak from the thermostat housing. I've tightened ...
MeltingDog's user avatar
  • 3,736
3 votes
1 answer
4k views

Why can't I get my thermostat housing to seal?

I have a 2002 Nissan Almera 1.8L AT which I've been fixing up. The thermostat needed to be replaced. Unfortunately, I threw out the old thermostat after buying the new one, but I strongly suspect ...
Robert S. Barnes's user avatar
3 votes
1 answer
687 views

How to diagnose a P0125 on a 2001 Lincoln Navigator

I have a 2001 Lincoln Navigator that intermittently throws a P0125. From my research the most likely cause is Thermostat or Engine Temp Sensor. Is there a procedure to determine if the Thermostat is ...
jlo-gmail's user avatar
  • 170
3 votes
1 answer
429 views

No Heat No Clue

I have a 2001 Dodge Neon. I replaced the thermostat because the heater was blowing cold air. The heater is still blowing cold air… The car does not overheat. It doesn't feel like water is flowing ...
CDale S.'s user avatar
3 votes
1 answer
66 views

What component failure could cause this?

Despite the temperature here being +13°C today, this 2007 Vauxhall Corsa has started reporting anywhere from -37 to -40. My gut feel is that there must be an external thermostat that has failed, ...
Rory Alsop's user avatar
  • 18.6k
3 votes
3 answers
1k views

Changed thermostat but the need to top the coolant up every few days

I have a Nissan March (Micra) 2003 and I had a thermostat problem (was jammed) and my friend changed it for me almost 9 months ago. Ever since then, I need to top up the water every few days. If I'm ...
akam553's user avatar
  • 31
3 votes
1 answer
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) ...
Iman Nia's user avatar
  • 237
3 votes
1 answer
134 views

Thermostat Problem?

The temperature where I live is in the fifties Fahrenheit and it seems like its taking a very long time for the engine to warm up and exit open loop mode. I have a 97 Mazda Lantis 323 and I'm ...
Robert S. Barnes's user avatar
3 votes
1 answer
63 views

How do I move this loom temporarily?

Working on a 2013 Chevrolet Impala LS, 3.6L VVT Engine. I need to remove the thermostat housing in order to replace the thermostat. After much pushing, shoving and swearing I managed to get the ...
PeteCon's user avatar
  • 8,712
3 votes
2 answers
7k views

My system coolant for is overheating even after I've changed the thermostat

My car is a Honda Civic LX 2002, 4 cylinder. It is overheating after I've changed the thermostat, there are no cracks in the cylinder block and radiator, brand new gaskets.
Talita Helms-rodriguez's user avatar
3 votes
1 answer
2k views

opel corsa c 1.7 DTI won't reach engine temperature

I have a Corsa C 1.7 dti and I have a problem with it, I visited many garages to fix this problem but all of them suggested me to change the thermostat. I followed their advice, tried 4 thermostats by ...
h0feer's user avatar
  • 31
3 votes
2 answers
6k views

1.6 Petrol engine overheats intermittently

I have a Vauxhall Vectra 1.6 (2007). The cooling system operated perfectly (a few kms after starting the engine the needle was pointing to optimum temperature without the slightest waver). 2 weeks ago ...
Gergely Bacso's user avatar
2 votes
2 answers
2k views

How can I open my thermostat cover which is stuck due to using too much gasket maker material?

I have to replace my thermostat with a new one. I have removed all the bolts of thermostat cover in my car but the gasket maker material has caused the thermostat housing and thermostat cover to stick ...
LFY MP7.3's user avatar
  • 968
2 votes
2 answers
1k views

How do I choose the correct thermostat?

I want to change the thermostat in my 2001 Audi A3 8L1 1.9L myself, but I don't know which one to buy. I went on my local dealer's website, punched in my vehicle information, and I got a few ...
erikvimz's user avatar
  • 361
2 votes
1 answer
1k views

Thermostat or temperature sensor (2011 Town & Country)

My 2011 Town and Country is reporting P0128 intermittently. If I understand correctly, this error code points to either the thermostat, the ECT sensor, or a computer module. When driving normally, ...
Zack's user avatar
  • 131
2 votes
2 answers
396 views

Torque specs for a plastic thermostat flange

I recently replaced my thermostat flange which is made of plastic. Unfortunately, I didn't find any torque specs for its bolts in the manual. Since, plastic parts break easily, I'm afraid of over-...
LFY MP7.3's user avatar
  • 968
2 votes
1 answer
471 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 ...
Jonathan W Michels's user avatar
2 votes
2 answers
73 views

1998 Galant not starting, has no thermostat

The car has a new battery and new starter, but no thermostat. The battery seems to be drained - the headlights will not come on, there is no clicking sound when I try to start and it won't even crank....
jeff's user avatar
  • 21
2 votes
1 answer
8k views

How long it take for car engine to heat up to a normal range ? 2005 Toyota Camry 2.4L L4 FI DOHC 16V

I recently bought a used 2005 Camry with 157k miles on it. What I notice is that the thermostat gauge stays in the middle even while the car is running at 70mph. Today I noticed that it takes 3 ...
user2958481's user avatar
2 votes
1 answer
1k views

2002 Impala 3.8L V6 thermostat gauge starts below cold then creeps toward red

My 2002 Impala 3.8 has been running great. However, this summer the thermostat gauge stopped reading temperature right. To the point it wouldn't move even after it had been running for hours. It would ...
JacobWarren's user avatar
2 votes
0 answers
180 views

Car overheating + new thermostat

My Renault 25 has been having cooling problems for several weeks now, yet i cannot figue out the problem. It has a new thermostat and water pump. Without thermostat, I cannot install a gasket so it ...
Clint Wolfs's user avatar
1 vote
2 answers
105 views

What would be the long-term result of driving without a thermostat?

Would there any damage done to an engine if you run it without a thermostat permanently? Let's assume the vehicle is driven in a climate that is warm and temperatures never drop below freezing.
TheLegendaryCopyCoder's user avatar
1 vote
1 answer
2k 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?
Maheshwaran ramasamy's user avatar
1 vote
4 answers
339 views

Is it worth refurbishing a metal gasket for a thermostat housing?

The problem I have a leak in the upper half of this thermostat housing on this T5 engine of a Volvo between parts 28 and 27 of the diagram below. I disassembled things today and found a metal gasket (...
jxramos's user avatar
  • 1,860
1 vote
2 answers
282 views

Cooling system problem (Car gauge always at cold) 2006 Honda fit 1.3L IDSI

I have a 2006 Honda fit 1.3L IDSI and Im having a cooling system problem. Engine Coolant Temp gauge always at cold. can u guys help me narrow down the cause of this? I recorded some data with my ...
john natalis's user avatar
1 vote
2 answers
4k views

temperature gauge too low while the AC is on

I changed my radiator to double cell, after the single cell got leaking. I now noticed that the temperature gauge never goes up to normal gauge whenever I turn on the AC, and the Fan never idles. ...
Kodi's user avatar
  • 11
1 vote
2 answers
2k views

Can a water pump slowly fail?

Do water pumps generally fail all of a sudden, or can they slowly stop working effectively? My 99 Subaru Legacy recently started overheating on long-ish trips (> 25 min or so). I already replaced ...
Cullub's user avatar
  • 1,364