new thermostat and cts still wont get up to middle temp on dash

[ADS_V6]

as above had new thermostat.coolant and thought that would sort problem,had cts fitted 3 months ago car will still not get up to middle on temp gauge help please

 

[not normal dan]

What car?

 

[ADS_V6]

172 cup

 

[not normal dan]

Have you logged the actually reading from the cts using live data diagnostics?

What stat did you fit genuine? Or after market?

 

[ADS_V6]

renault stat coolant waterpump is new renault very odd

 

[MicKPM]

Did you check and test the thermostat operation before fitting it?

 

[ADS_V6]

hi Mick garage fitted it along with new pump,coolant etc was a new renault stat the cts sensor was euro parts so maybe its a crap sensor,the car has been like this previously engine lacks power until driving for ages lol

 

[MicKPM]

Well there's only one way to tell and that's to test the lot. I always test my thermostats now before they go in to stock as I've had a few from Renault not open or seal closed correctly.

Type-D isn't expensive but it's the customer having to return unhappy I don't like.

 

[ADS_V6]

thanks i popped up garage euro car parts is going to give me a new sensor they checked the stat in garage so it must be a new dodgy sensor cant see what else it can be the heater works but its not red hot and the fan takes long time to cut in

 

[MicKPM]

I'd check its temp readings physically and electronically to rule out an electronic vs mechanical fault.

 

[ADS_V6]

many thanks im not much of a mechanic,what could be wrong other than stat or sensor,are there any other things to look at cheers

 

[MicKPM]

Water pump, coolant circuit, expansion cap, stat faulty... Just a few examples

 

[ADS_V6]

hi is there a seprerate sender unit for the dash?

 

[MicKPM]

Nope, it's a single sensor now that feeds the ECU which is shared via CAN

 

[ADS_V6]

thanks for the replies,getting a new cts tomz renault one ive left car idle on the drive the gauge goes to 4 bars thats it,the rad hose is very warm but the one that goes into the front of the expansion tank is not very warm peeing me off now this cup bloody nightmare,can this affect the performance Mick cause it seems lumpy and spluttery lol

 

[MicKPM]

Yeah, the CTS data stream is a very important baseline which the ECU uses to determine how the engine will run. It can cause over fuelling and misfires along with some other nasty things on turbocharged vehicles.

If it's hitting the half way mark when stood but dropping when driving it's almost certainly a poor stat imo

 

[ADS_V6]

hi thats the thing its perm stuck on 4 bars not even reading the middle,wont even rise on 4 bars left idling for 10 mins

 

[172Ben]

mine never went right into the middle

 

[ADS_V6]

i never even hear the fan cutting in in traffic very odd,sat on drive it eventually comes on,bleeding potluck these cars wish i was closer to a specialist

 

[MicKPM]

Right, in that case I'd want to see a reliable data stream value vs a physical measurement to see if the sensor is lying

 

[ADS_V6]

hi can my garage do that easy enough Mick

 

[MicKPM]

They *should* be able to yes. They will need access to some ODBII compliant equipment and an IR thermometer/pyro

 

[ADS_V6]

thanks again maybe for the cost of them checking i could just buy another sensor i have another stat aswell but its a euro car parts one so might swap the renault one and sensor its in garage thursday so i will post update,if no change match and a clio bonfire i think

 

[MicKPM]

When it comes to stats and sensors you really should stick with genuine parts. I personally won't use anything but genuine parts because every time I've used something else it's bitten me in the ass.

 

[ADS_V6]

ouch yes that bleeding new stat was from renault cardiff bought last week lol,thats why im thinking it should be ok the cts was 20 quid from ecp,i changed the cts in may as the car wasnt starting when hot,but i also changed the battery and wollah all sorted now thinking maybe the battery was the cause and i bought a new duff shi**y ecparts sensor Mick

 

[ADS_V6]

Mick hi got new cts from renault will be fitted tomz,the car is lacking in performance and car is only on 32k,can the low temp issue make car less powerful it feels like its running lean

 

[MicKPM]

Yep

 

[ADS_V6]

i wish i was closer to some1 who knows these cars thankyou again

 

[ADS_V6]

just had another coolant sensor changed,thermostat changed still gauge not i n middle sits on 3 bars im stuck now

 

[ADS_V6]

fitted another stat,still stuck on 3 bleedin bars done the stalk test gauge goes fully up,what else could it be

 

[callum_bell]

looking through these posts and spotting things like,

1 - the heating not being red hot
2 - one pipe hot the other pipe not so hot

that would lead me to suggest there is an airlock within the cooling system.

I would run the car for a while till it heats up and check how hot all the cooling pipes are. if there are any that are noticably colder than others this would suggest air in the system.

 

[ADS_V6]

thankyou i cant think of anything else to do 2 new stats,cts sensors the 2nd pipe under expansion tank isnt as hot as the others

 

[callum_bell]

thankyou i cant think of anything else to do 2 new stats,cts sensors the 2nd pipe under expansion tank isnt as hot as the others

Im guessing this means the two pipes under the bottle that go through the bulkhead?

If it is, would usually mean an air lock at the heater matrix one pipe is the feed and one is the return

 

[ADS_V6]

thanks how can i get to the matrix

 

[callum_bell]

thanks how can i get to the matrix

you don't need to get to the matrix you just need to bleed the sytem