Temparature needle - Thermostat?

[_Tom]

My temperature needle starting waving between min and half yesterday. today its not going much about the first notch. Would that be the thermostat do you think?

 

[_Tom]

Also, should a 182 limit at 6800ish revs?

 

[davo172]

Stat mate yes andrev limit will change if it thinks its cold.

change coolant sensor also at same time

 

[_Tom]

Thanks mate. Thought as much. What do they normally limit at? 7?

I'll get them changed.

 

[davo172]

Thanks mate. Thought as much. What do they normally limit at? 7?

I'll get them changed.

Yes mate . and swopping them will sort it

 

[E11OOT]

does anyone have the part numbers for these?

 

[koi]

Also interested, seems quite a few people are having this problem

 

[mark123]

I'd just change the thermostat to start with, that fixed a similar problem on mine.

Should limit at 7200 when warm.

 

[Djw John]

When you say it was swinging between the two do you mean rapidly? If so just change the sensor just now. And when cold the rev limit is 6.8k and 7.2k warm.

 

[_Tom]

Yeah i guess you could say rapid. I just drove it then and it didnt get to warm, turned it off then back on again. It shot up to warm then dropped to 1/4. Then back to warm again..haha

It also limits at 6.8k.

 

[Ian_s]

Thats CTS rather than thermostat, no way an engine will change temp that fast. Give the loom a wiggle first, I've got a loose connection on mine that plays silly buggers with the temp.

 

[Djw John]

Defo the cts then mate easy and fairly cheap.

 

[Bluebeard]

Coolant Temp sensor.

It thinks the cars cold so sets the limiter to 6800.

 

[Djw John]

Also c***s up the fuel mixture and runs rich

 

[_Tom]

Ahh rich you say.. Mine doesnt seem to have as good mpg at the mo so could make sense. Thanks gents. Where is the coolent temp sensor? Also, where's best to get one? GSF?

 

[_Tom]

Is it the one below the throttle body?

 

[Munson]

I was told by my dealer that it's not actually the sensor, but dodgy wiring. Either way, get it looked at fast.

It may seem quite innocent, but it massively over fuels the engine. Caused mine to break down. Get it sorted as soon as possible.

 

[_Tom]

Ah right. So who am i best to take it too? If its just a sensor i'll swap it as soon as i know which one it is. If its wiring it needs to go to someone..

 

[Djw John]

Yeah below the throttle body. Just changing the sensor worked for me so can't comment on the wiring.

 

[Dan519]

sensors are known to be a little prone to breaking. Thermostat is still well worth replacing, should be done every couple of years really, yet most have never been touched from new

 

[_Tom]

Thanks again. So it this the CTS?

 

[Dan519]

thats the one. Actually looks like a new sensor already (very clean)

 

[_Tom]

Thanks mate. Thats a bit worrying. So should i just change the sensor and cross my fingers? Another worrying thing is today its being absolutely fine. Where best to take it in the SW if a new sensor doesnt sort it? Will it need rewiring?

 

[koi]

Is this the right part? http://www.eurocarparts.com/car-thermostat

Is it just a case of taking the old one out and putting the new one in?

 

[Ian_s]

Is this the right part? http://www.eurocarparts.com/car-thermostat

Is it just a case of taking the old one out and putting the new one in?

The right part for what? We're talking about the coolant temp sensor. Your problem may be the thermostat.

 

[koi]

The right part for what? We're talking about the coolant temp sensor. Your problem may be the thermostat.

Ah wrong part then guessing I need the coolant temp sensor as the gauge is reading 1 block lower than the middle

 

[Dan519]

Ah wrong part then guessing I need the coolant temp sensor as the gauge is reading 1 block lower than the middle

you only need to worry about the sensor if the gauge is erratic (or non functioning). consistently low temperature will be down to a lazy thermostat

 

[koi]

you only need to worry about the sensor if the gauge is erratic (or non functioning). consistently low temperature will be down to a lazy thermostat

Thanks, will change the thermostat and see if it fixes it then. Easy job?

 

[_Tom]

Got a genuine CTS from Renault for £22.00. All issues sorted and i've seen the highest mpg figures i have since i had the car. It was on 44 earlier on the trip to work?! Also i have my 7.2k limiter back..

Thanks gents.

 

[Djw John]

Good stuff mate