Questions tagged [thermostat]

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11
votes
5answers
86k 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 ...
8
votes
2answers
17k views

How does the thermostat work?

What happens when the thermostat is stuck open or closed? How does it work?
7
votes
2answers
897 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 ...
6
votes
3answers
9k 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?
6
votes
2answers
23k 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?
6
votes
3answers
3k 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 ...
6
votes
2answers
9k 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?
6
votes
1answer
6k 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 ...
5
votes
2answers
170 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 ...
5
votes
1answer
486 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 ...
5
votes
2answers
4k 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 ...
4
votes
2answers
1k 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 ...
4
votes
1answer
839 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 ...
4
votes
1answer
446 views

Thermocouple vs Thermostat

Why don't modern engines use a thermocouple (electronic temperature sensor) instead of a (wax element) thermostat?
4
votes
2answers
5k 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 ...
4
votes
2answers
4k 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 ...
4
votes
1answer
2k 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 ...
4
votes
1answer
75 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. ...
4
votes
1answer
4k 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 ...
4
votes
1answer
452 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 ...
3
votes
2answers
3k 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 ...
3
votes
2answers
19k 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.
3
votes
1answer
897 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 ...
3
votes
1answer
391 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 ...
3
votes
1answer
179 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 ...
3
votes
1answer
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) ...
3
votes
1answer
111 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 ...
3
votes
1answer
44 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 ...
3
votes
2answers
5k 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.
3
votes
1answer
828 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 ...
3
votes
2answers
5k 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 ...
2
votes
2answers
397 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 ...
2
votes
1answer
583 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, ...
2
votes
1answer
945 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 ...
2
votes
1answer
253 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 ...
2
votes
2answers
65 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....
2
votes
1answer
6k 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 ...
2
votes
1answer
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 ...
2
votes
2answers
37 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 ...
1
vote
1answer
83 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?
1
vote
2answers
109 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 ...
1
vote
3answers
295 views

Ran 2002 PT cruiser w/ out coolant/water, overheated but temp gauge showed normal.

I did a radiator flush, refilled the radiator with water and cleaner, and drove for about 10 minutes. Because I was trying to get my car to temp so the fans and water-pump would kick in I was keeping ...
1
vote
2answers
1k views

Where is the TVSV valve located in a Toyota Tercel 1987?

My car is a 1987 Toyota Tercel DX Wagon 1452cc 2bl manual driven car. It seems now it doesn't have a TVSV, Thermostatic Vacuum Switching Valve. I need it to activate the AAP Pump and the Choke Pull ...
1
vote
1answer
3k views

how to temporarily fix a gasket leak?

My thermostat gasket is leaking on my 00 Ford ka. Is there I sealant I can put around it as a temporary fix for a week or two before I can get it fixed?
1
vote
2answers
66 views

Which AC temperature gets rid of the fog

Today while driving in the rain, I was not able to get rid of the fog. Outside temperature was 21 degrees and I had set my AC to 23 degrees with front mode on. This tric works sometimes (Outside ...
1
vote
1answer
5k views

2010 Mini Cooper S - Coolant leak from thermostat housing

For more than a month, I have been noticing coolant leaking from the thermostat housing. This was identified by the dealer and another Mini specialist mechanic. The dealer wanted the housing to be ...
1
vote
2answers
1k views

temperature guage 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 guage never goes up to normal guage whenever i turn on the AC, and the Fan never idles. ...
1
vote
1answer
394 views

Why my Fiat Palio 1.6 2005 is overheating only after 5 min of drive?

I have a Fiat Palio 2005 which I bought few days ago. I was driving it for last complete week and it was very smooth there was no problem at all. Yesterday , suddenly on a highway the temprature ...
1
vote
1answer
61 views

Fan running the battery dead on a 96 Acura

Alright, my 1996 Acura 2.5TL is running the battery dead by running when not necessary. If it was continuously running after the engine shut off I would say stuck relay but it will both continue after ...
1
vote
0answers
141 views

Cyclinder 2 misfire error code - 11 Dodge Journey 3.6L V6

2011 Dodge Journey Mainstreet 2wd 3.6L V6 100k miles Check Engine Light on, first read Low Voltage replaced Battery Check Engine Light came back on, 2nd read Cylinder 2 misfire, & Thermostat ...