Increased volume DSG cooler

[Cog Head]

Evening all,

Has any one fitted the larger variant “C” DSG oil cooler?
While i have the bumper off sorting front mounted engine cooler, I thought I might change the DSG cooler for the larger genuine VW cooler used on the Audi TTS / RS

The van is mostly used for towing out twin axle 2T caravan, while reversing, the gearbox gets quite hot, I’m hoping this will help.

STR Performance Link
Dark side Developments Link

 

[RobertO2023]

What temperature do you measure as “quite hot”? The cooler relies on air flow so when reversing it will not be as efficient. I too do a lot of towing with a laden car transporter circa 2430kg but I can’t say I’ve ever thought of an excessive gearbox oil temp when reversing. I suppose it depends on how long you are reversing for.

 

[manfrotto]

As Robert says, Unless you are reversing for a long time/distance (and uphill) I can't see why the DSG would get excessively hot compared with traveling at high speed forwards.
Is the fan coming on while reversing as well?

 

[Dellmassive]

that cooler is water cooled.

the pipes you see are the water circuit.

the DSG oil in/out is at the bottom where it bolts to the top of the DSG box..




edit:

VW Transporter T6 T6.1 7 speed DSG gearbox oil cooler 0BT317019B

Part Number 0BT317019B Gearbox oil cooler New genuine original VW part To fit 7 speed DSG gearboxes To Fit Volkswagen Transporter/Caravelle/California T6 T6.1 2016 >> 2023 **This part may not fit all variations of the above models. Please send us your UK reg number or 17 digit VIN/Chassis...

www.partshaus.co.uk

Description​

Part Number ​

• Gearbox oil cooler
• New genuine original VW part
• To fit 7 speed DSG gearboxes

To Fit​

Volkswagen

• Transporter/Caravelle/California T6 T6.1 2016 >> 2023

**This part may not fit all variations of the above models. Please send us your UK reg number or 17 digit VIN/Chassis number as we can quickly confirm if this is the correct part for your vehicle

 

[Robert]

Evening all,

Has only one fitted the larger variant “C” DSG oil cooler?
While i have the bumper off sorting front mounted engine cooler, I thought I might change the DSG cooler for the larger genuine VW cooler used on the Audi TTS / RS

The van is mostly used for towing out twin axle 2T caravan, while reversing, the gearbox gets quite hot, I’m hoping this will help.

STR Performance Link
Dark side Developments Link

The first link is a cooler for DQ250.
This is definitely not the best choice for a van with DQ500 gearbox.

 

[Dellmassive]

airflow plays a minimal part as the cooler is ontop of the DSG tucked way back behind all the engine EGR stuff

 

[RobertO2023]

Although the gearbox oil cooler has water cooling, airflow through the engine compartment when travelling forward at road speeds does play an important part in latent heat dispersion.

 

[Cog Head]

More than one occasion I’ve finished parking the caravan with the fans blowing flat out.

It’s most prominent when we turn off a national speed limit road into a campsite where we have to stop to be greeted with Marshalls or site people to book in, so the van has gone from high load with airflow, to a standstill with no airflow for a few minutes, then into slow speed manoeuvres, which is where the gearbox gets a bit jumpy, especially in reverse, you can hear and feel that it isn’t particularly happy.

I know it isn’t going to change the world, but while I’m in there, what’s wrong with improving the cooling ability of the DSG

My van is a big heavy beast, T32, LWB, 204, DSG, 4Motion, full camper conversion, plus a 2tonne lump attached to the back of it.

 

[RobertO2023]

I would say there is no harm in fitting a higher capacity cooler as used on other VAG DSG gearbox’s . I’m not doubting your concerns in any way, but have you tried attaching a temperature probe to the gearbox casing to verify your observations? I use an infrared temperature reader on a race car which works well for spot checks. The cooling fans running are probably not connected with the gearbox oil temp. More likely the fact you have a hot engine and then reversing with no air flow over the rads, causing the coolant temperature to rise and activating the electric fans.
As an aside when towing I constantly monitor the engine oil temp and adjust the engine load / speed to keep within parameters.

 

[Cog Head]

I’m probably going to be doing the “upgrade” blind, as the van is currently up on stands while I finish putting my front mounted oil cooler together, again to aid in the towing temps, max recorded was 142 C on the way back from our Easter bank holiday rally, up a hill, I had to slow down to 40mph in fear of a self destructing engine!
The oil temp is ALWAYS on the MFD, I watch it like a hawk, and will continue to once the oil cooler is completed.

I’ve been toying with buying a thermal imaging camera for “work” I think this may be my time to convince the accountant that it should shuffle upto the top of the purchase tree.

 

[Dellmassive]

142C engine oil temp. . !!!

thats not good, oil starts to degrade when its too hot.

regular oil changes will help out here.

 

[Cog Head]

Yup!
That’s why I’m going balls deep into the front mounted oil cooler.
The oil at the time was 4,000mi old, so by no means old.
Needless to say, once complete, the van will be getting a few oil changes in quick succession to ensure I’ve got any crap out of it that may remain.

One reason for the high oil temp was the DPF was fairly blocked up, meaning the turbos where pushing harder than that should, I’ve done a lot of work to free up as much cooling headroom as possible.
We’ll soon see the results.

 

[Dellmassive]

Yup!
That’s why I’m going balls deep into the front mounted oil cooler.
The oil at the time was 4,000mi old, so by no means old.
Needless to say, once complete, the van will be getting a few oil changes in quick succession to ensure I’ve got any crap out of it that may remain.

One reason for the high oil temp was the DPF was fairly blocked up, meaning the turbos where pushing harder than that should, I’ve done a lot of work to free up as much cooling headroom as possible.
We’ll soon see the results.

What was the dpf clogged caused by?.

If that resolved now?

 

[Cog Head]

I took it off and back flushed it twice, the first time didn’t really get anything out, the second time was a sea of black when I washed it out, it was fulfilling up with water quicker than it would drain out, it wasn’t til I added an airline to the flow and sealed the end that the much started to shift, I’ve not run it since then as the bumper come off to do the oil cooler works, if it still causes the temps to be high, it may or may not become damaged

 

[manfrotto]

Are you also monitoring your water temperature via VCDS (rather tha the guage on the dash)?

 

[Cog Head]

Not while I’m driving with family in the van, that would be a bit much.
Is there a phone base diagnostic app that I can set to monitor oil temp, water temp, DSG temp ect?
That would better to monitor while driving

 

[manfrotto]

I use VCDS, but I suspect something like OBDeleven or carista could probably do it.

My brother who tows a largish boat with his Toyota Hilux modified his temperature gauge to remove the zenor diode (which essentially allows the temperature guage to go to 90deg and staying there until the temperature is too high). With that mod the temperature guage reads the actual temperature, and can see it creep up going up hills etc.

I'm not sure if anyone has done something similar on the VW temperature guage, but it might be easier just to add another temperature gauge which reads correctly.

 

[manfrotto]

something like this perhaps...

Thread 'Coolant temperature readout obd2.'

7 Jun 2023

Hello everyone.
Does anyone know what temperature sensor the OBD2scan is reading from correctly?
I am driving a 2017 T6 110kw.

I noticed a few months ago that my gauge of my coolant was very slow to warm up and in some cases did not even reach 90.
My mechanic told me my thermostat was probably broken.
After a repair of almost 2k further with a replacement of the electronic thermostat, water pump, distribution and so on, I notice that there is definite improvement but it is still more sluggish to warm up than it was before the problems. If I don't do highways it takes almost half an hour...

• Chessbo
• coolant obd2 oil temperature warm
• Replies: 7
• Forum: Engine, Gearbox, Exhaust, Drivetrain

 

[mmi]

Is there a phone base diagnostic app that I can set to monitor oil temp, water temp, DSG temp ect?

Android app Torque does all that for me

Thread '[T6_measured] Monitoring DPF regeneration, DPF condition, EGR operation'

18 Dec 2022

Here's another approach for T6 DIY enthusiasts - taking advantage of very popular Carista OBDII-reader device - combined with an Android app.

Ingredients:​

• T6 EU6 engine: CXEB,CXEC,CXFA,CXGA,CXGB,CXGC,CXHA,CXHB.
• Carista OBDII device (also other generic OBDII (ELM327) devices will work)
  • for alternative (faster) dongles see post #15 ---> [T6_measured] Monitoring DPF regeneration, DPF condition, EGR operation
• Android phone or tab
• Torque Pro app from Google Play Store (by the way, a £5 software from the UK)
• A setup file for T6 (attached) -...

• mmi
• dpf egr t6_measured
• Replies: 92
• Forum: VCDS-VagCom / Carista / OBDeleven

• 
• 

EDIT -

Spoiler: Torque app

 

[Cog Head]

Which app will serve me better for displaying realtime data from engine coolant, oil, DSG temperatures?
I already have VCDS, so a little reluctant to buy another to do the same thing.
I already have an OBDLink MX if that makes any difference?