For sebcustom

[tranmx2]

I've read some post where you mention that your van is running with coolant temp around 70-75°C (using Forscan of course).
But it isn't the normal operating temperature, it should be around 80-88°C, regulating by the thermostat opening ?

My question is: do you have the original thermostat, and did you change your coolant since you have your van ?

On my 2.2 custom 2013, I have recently changed the egr valve that was stucked, also the thermostat + temp sensor, and a coolant change.
And since then, coolant temp is 70-75 in town or country road, on the motorway a bit more but I rarely reach more than 80°C, even when I try to put the van at 3500rpm (oil however is reaching a little more than 90°C).
Before the thermostat and coolant change, I think my coolant temp reading were higher (around 80-85°C), but I'm not sure since I didn't payed too much attention...

I have problems with my DPF (since the egr problem I think). It was blocked so I had to cleaned it with DPF cleaner, and tried to solve the issues that created the problem, but now it is doing regens a lot (every 100km, maybe even less). and so the low coolant temp seems to be an issue for me as the regen can only start if the coolant temp is above 80°C.

I have not found information that shows what the recommended coolant temp is.
The thermostate and sensor and the coolant have been changed.
The thermostat has 88 C stamped on it.
The gauge if divided could indicate 90 C when the needle is verticle.
The condition of the coolant and coolants system has an affect on the temperature of the coolant.
The operation of the cab heater can affect the coolant temperature.
The EGR and EGR cooler were removed from the engine.
The consul gauge needles show an aproximate amount.
Older engines were considered to operate at 70 C. The 30 year old A6 coolant temperature is shown as 90 C on the gauge it has two sensors one for the gauge and one for the ECU.

DPF see ORiley on youtube. He shows what the D DPF (differential pressure needs to be).
The D DPF pressure is important, differential pressure, the difference of the pressure at the front and back of the DPF.
The DPF can be blocked by ash. Cleaning the DPF may not remove the ash.
I have not read that the coolant needs to be 80 C for the regen to occur.
I have not checked the coolant system pipe temperatures relative to what is shown on Forscan or on the gauge.
Forscan could take a reading from the sensor or via a module or modules.
Forscan may or may not show the correct temperature.

oil however is reaching a little more than 90°C. I don't know where the temp of the oil is taken from - there are two sensors re the oil that I know off one is pressure located on the oil cooler housing and one is the oil level which is below the turbo. There is a red light on the consul for oil pressure it goes off just after starting the engine when the oil pressure is sufficient.

Could not attach on the other reply.

Coolant syst likely was txt.png

The dwg shows how the system likely was.
The system on my van is no longer like the dwg.

[metalworker0]

Well for £6.99 is this worth a try ..point it anywhere and you get a reading

https://www.ebay.co.uk/itm/405904873524?


for £1.99
You can have one of these ..this only has a 1 meter wire on it though ..sure you can find longer ..just bluetack the probe to somewhere on the engine ..you can then monitor as you drive.
https://www.ebay.co.uk/itm/254980728107?_

or if you are like me and go to car boot sales you've got 3 or 4 of the quality ones
plus some mulimeters have a K type socket on them ..then you only have to buy the wire

Not sure what accuracy you are going to get for that cheap price above ,...but worth a go ..perhaps.

otherwise ---- perhaps you have cheap chinese thermostat housing with cheap Chinese thermostat

Your own quote from a few days ago

The thermostat on mine opens at 88 C. Forscan usually shows 70 to 75 C

How mine runs - if temperature gauge calibrated same as yours, the temperature needle will only be strait up and vertical (which you say is 90) on the hottest days of the year ...plus 25c

These engines are overcooled...you have a big block of cast iron sitting in the wind... if that's loosing heat then your thermostat will be bypassed.

Newer vehicles now have temperature controlled louvered shutters in front of the radiator

all the best.mark