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Why is my temperature gauge always near the bottom?

The temperature gauge always looks to be right at the bottom, It is always on low instead of half way which is where it would be in summer. is it just because it is cold and winter?

My fan blows hot air so apparently it is not the head gasket, Could it be the thermostat? haven't heard the cooling fan kick in for ages either?? perhaps that's to do with the cold as well?

any ideas plz ppl?

Reply 1

Camoxide

14

It'll take a couple or more miles to warm up during the winter.

Is it going up at all?

Reply 2

gbduo

15

Yeh could be the thermostat is stuck open, how many miles are you doing and what car is it?

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Reply 3

FXX

19

Running the heater on full blast takes a lot heat away from the engine. If it's only when the heater is on high and the air temperature is very low, that could explain it.

Reply 4

lazyboi

because of the winter and it's totally fine. Just keep driving. the only gauge you should worried about when driving is the fuel gauge :biggrin:

Reply 5

Sol1dShot

Original post by lazyboi

because of the winter and it's totally fine. Just keep driving. the only gauge you should worried about when driving is the fuel gauge :biggrin:

or the revs. 8000 RPM you say? :smile:

Reply 6

JC.

19

Does it even have a thermostat in it?

Reply 7

lazyboi

Original post by Sol1dShot

or the revs. 8000 RPM you say? :smile:

No need of that. 8000 rpm might **** it up in the long run if it's a small engine. After you start the car, just wait for a minute and you'll be good to go. high rev on a cool engine is not a good idea. it's ok if the temp gauge is low. nothing to worry about

Reply 8

matt123roll

Original post by lazyboi

because of the winter and it's totally fine. Just keep driving. the only gauge you should worried about when driving is the fuel gauge :biggrin:

What a ridiculous thing to say, certain cars are prone to blow HG's and more so if it's an old engine.

As people have said in winter it can take longer to warm the engine as the air entering the engine is much colder and you'll more than likely have your heaters on in the car which draws heat away from the engine. Drive the car for a good 30 minutes and then see if the stat moves to where it should.

Depending on the car could be a thermostat, wiring fault, coolant temp sensor etc

Reply 9

Sol1dShot

Original post by lazyboi

No need of that. 8000 rpm might **** it up in the long run if it's a small engine. After you start the car, just wait for a minute and you'll be good to go. high rev on a cool engine is not a good idea. it's ok if the temp gauge is low. nothing to worry about

Maybe for you, but (when i get it) my lambo will laugh at 8k revs!

Reply 10

gbduo

15

My S2000 laughs at 8k revs, as do most Honda and Toyota vvi engines, nothing that special.

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Reply 11

Young & Ready

OP

Original post by gbduo

Yeh could be the thermostat is stuck open, how many miles are you doing and what car is it?

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Original post by Camoxide

It'll take a couple or more miles to warm up during the winter.

Is it going up at all?

Original post by FXX

Running the heater on full blast takes a lot heat away from the engine. If it's only when the heater is on high and the air temperature is very low, that could explain it.

Thanks everyone. Car is an Astra. Even after driving down the motorway it still remains on the low, though the other day it did move about an inch up and went back down again but has remained on low ever since?

Reply 12

Camoxide

14

Original post by Young & Ready

Thanks everyone. Car is an Astra. Even after driving down the motorway it still remains on the low, though the other day it did move about an inch up and went back down again but has remained on low ever since?

Yeah definitely a problem there. Hopefully only cosmetic because if the ecu thinks the engine is cold you'll be constantly running rich.

Reply 13

gbduo

15

Thermostat is cheap and consumable so I would start there.

You can do your tests, but when a new part is less than £10 I would just replace.

Reply 14

username234673

17

Original post by gbduo

My S2000 laughs at 8k revs, as do most Honda and Toyota vvi engines, nothing that special.

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Even my 125cc Yamaha engine will do 8,000 rpm happily...

Reply 15

username492312

Original post by Young & Ready

Thanks everyone. Car is an Astra. Even after driving down the motorway it still remains on the low, though the other day it did move about an inch up and went back down again but has remained on low ever since?

What Astra is it? I've got an mk4 (or G) And the engines are massively over cooled and the thermostats aren't brilliant.

Mine gets warmed up to the middle of the gauge. But if you do any driving where air is getting pushed into the car like motorway or dual carriageway the gauge always drops down to near 80 until you slow down again.

Reply 16

Beau168

As others have said it's most likely the thermostat.It's not much of a problem and your car will be fine, it's just the engine works more efficient when it's warm. Depending on where the thermo is located it can be a DIY Job.

You can just run it like that though, shouldn't be any harm done to the engine. It's still hot, just not enough to push the indicator up.

Reply 17

gbduo

15

Er...that is not strictly true, having cold cylinder liners causes corrosion from dew forming in the block which then mixes with the sulphur in the fuel and forms sulphuric acid.

Reply 18

Young & Ready

OP

Original post by gbduo

Er...that is not strictly true, having cold cylinder liners causes corrosion from dew forming in the block which then mixes with the sulphur in the fuel and forms sulphuric acid.

Who are you replying to here?

Original post by Arron17

What Astra is it? I've got an mk4 (or G) And the engines are massively over cooled and the thermostats aren't brilliant.

Mine gets warmed up to the middle of the gauge. But if you do any driving where air is getting pushed into the car like motorway or dual carriageway the gauge always drops down to near 80 until you slow down again.