Diesel automatic oil cooler

AnderN · 14th October 2020, 10:12

Greetings,

I have a 2004 ZT (facelift) saloon diesel with JATCO automatic gearbox. At some point the car couldn't reach and keep the engine operating temperature so I changed the thermostat but unfortunately no change in behavior. Even after a long run the engine was still able to make only around 65°C (instead of ~90°C). I started to suspect the automatic transmission oil cooler that also includes one thermostat inside but I can't find it anywhere to buy (either the thermostat or the whole cooler). Other cars with the same engine/gearbox combination (such as LR Freelander) seem to use a different cooler for the gearbox oil.

As a workaround, I have added one more thermostat to the cooling circuit, this improved the operating temperature to ~80-85°C. It is definitely better than before and far better than experiencing some overheating problems but it's still not perfect.

Question -- do you know where to buy the transmission oil cooler for my car? It appears to no longer available at rimmers or anywhere else:
https://rimmerbros.com/Item--i-GRID001593

Or is there anyone in here who had the same problem? How did you solve it?

Thanks in advance!

14th October 2020, 10:12	#1
AnderN Newbie MG ZT Join Date: Sep 2009 Location: Brno Posts: 5 Thanks: 0 Thanked 1 Time in 1 Post	Diesel automatic oil cooler Greetings, I have a 2004 ZT (facelift) saloon diesel with JATCO automatic gearbox. At some point the car couldn't reach and keep the engine operating temperature so I changed the thermostat but unfortunately no change in behavior. Even after a long run the engine was still able to make only around 65°C (instead of ~90°C). I started to suspect the automatic transmission oil cooler that also includes one thermostat inside but I can't find it anywhere to buy (either the thermostat or the whole cooler). Other cars with the same engine/gearbox combination (such as LR Freelander) seem to use a different cooler for the gearbox oil. As a workaround, I have added one more thermostat to the cooling circuit, this improved the operating temperature to ~80-85°C. It is definitely better than before and far better than experiencing some overheating problems but it's still not perfect. Question -- do you know where to buy the transmission oil cooler for my car? It appears to no longer available at rimmers or anywhere else: https://rimmerbros.com/Item--i-GRID001593 Or is there anyone in here who had the same problem? How did you solve it? Thanks in advance!