Hello all. As you all know winter is coming and this will be my first winter with this car. I have a temp/boost gauge fitted because the car is mapped to 150hp.  Anyway with the colder temps my coolant temp sits at about 72*c on the motorway and will never go above 80*c even with sustained WOT. The car only gets to 90*c when doing a normal regen in traffic. 

 

The odd issue ;

 

When the coolant temp drops to 68*c the car starts doing a regen but as soon as the temp gets above 70*c it stops. Only drops this low when doing 30 mph with the heaters on. Would we suggest that the car wants a thermostat and that it only regens to try keep the engine temp up ?

 

 

I do frequent long journeys and In the summer the car used to regen about every 300 miles depending on the sort of driving I did.

Edited 20 November, 20223 yr by Benturner166

Has it ever had a thermostat, while not the same engine I had this cool running issue on my 1.4TDI Greenline which I resolved by swapping the stat out. Also you mention a "fitted" temp gauge - the Greenline relies on the blue light that goes out at about 45 deg.C so have to use Torque to monitor this - if this is non standard where is the reading taken from. Unsure of the strange regen issue, I know it has to be above a certain temp to regen, where yours is stopping the regen when it goes over a certain temp.

5 minutes ago, KeithCheetham said:

Has it ever had a thermostat, while not the same engine I had this cool running issue on my 1.4TDI Greenline which I resolved by swapping the stat out. Also you mention a "fitted" temp gauge - the Greenline relies on the blue light that goes out at about 45 deg.C so have to use Torque to monitor this - if this is non standard where is the reading taken from. Unsure of the strange regen issue, I know it has to be above a certain temp to regen, where yours is stopping the regen when it goes over a certain temp.

Hello thanks for your reply. Im not sure on the history so it probably has never had a thermostat.  Im using a multifunctional obd2 plugin gauge ( Autool x60) to read the temperature as I also have the blue dummy light and the engine is cooked light lol . I do believe these have multiple coolant sensors so would be unsure on which one. But it reads all the way from cold so I would assume its one on the block and not the one on the radiator exit. 

 

I think im going to bite the bullet and do a thermostat on it. Apparently its a pain in the arse crammed right under the intake and fuel pump so looking forward to that 😂  If anyone has ever done one a link to a youtube vid or pictures on how to do it would be appreciated.

 

Its going to have to wait a couple weeks but ill get round to it

Hello all

 

Its a couple weeks later and I have changed the thermostat. Its a **** job to be plain and honest. Took me 3 hours in the end but I am a HGV technician and do not touch cars unless mine needs work.  If you have limited mechanical experience I recommend chucking it into the garage rather than attempting this on the driveway. 

 

Either way the car now sits happily at 90*c and my heater is able to melt my face off.   The odd regens have stopped aswell which is a bonus. 

 

 

I think the thermostat lives between where the battery and the engine is next to the throttle body. Fuel pump is on the belt side.

36 minutes ago, Bertie90 said:

I think the thermostat lives between where the battery and the engine is next to the throttle body. Fuel pump is on the belt side.

Its behind the alternator and below the fuel pump on the left of the intake manifold.  Its a ****er to do...

My friend how did you connected the boost gauge. From where did you take boost pressure?

X60 manual - AUTOOL (autooltech.com) As you will see they are connected with a cable to the cars OBD2 port taking an ECU read value. On my car, I have a 7" Android head unit running the Torque app which reads from the OBD2 port via a bluetooth dongle, with the "vacuum" gauge actually indicating boost. The Autool route is the cheaper option for the same results and can probably be placed in a better position for viewing. 

Edited 7 March, 20233 yr by KeithCheetham
Torque App

i dont want an obd gauge because i dont trust it.

1 hour ago, DeadlyGunGR said:

i dont want an obd gauge because i dont trust it.

 

Haha, a boost gauge isn't exactly essential so trust issues are a moot point!