Towing and overheating with Commander Diesel?

[08crd]

Now that's nice Clarky, where did you source that, I want one.lol
Does it fit the Merc box?

[Clarky]

Yep for the nag1
click on the amazon Link

Amazon

 

Amazon

[08crd]

You really are excelling, keep it up.

[multihull]

Ah but have you considered that more fluid means once it's hot it will take longer to cool down too.
Did you know the Commanders have 4 cooling radiators systems at the front of the car?
engine coolant; transmission cooling; turbo intercooler; Whats the 4th one for, power steering?

I haven't heard of anyone having engine temp problems in a Grand or Commander except when the radiator was blocked with bugs or mud.
Have there been problems with the transmissions over heating?

[keef_7]

Our camper only weighs about 1.2 and we have towed it up some scaly hills etc with out any issues but I have had transmission over temp warning a couple of times reversing it up our drive way which is reasonably steep.

[Clarky]

Originally Posted by multihull

Ah but have you considered that more fluid means once it's hot it will take longer to cool down too.
Did you know the Commanders have 4 cooling radiators systems at the front of the car?
engine coolant; transmission cooling; turbo intercooler; Whats the 4th one for, power steering?

I haven't heard of anyone having engine temp problems in a Grand or Commander except when the radiator was blocked with bugs or mud.
Have there been problems with the transmissions over heating?

Yes the 4th is the power steering/hydraulic fan cooler.
With the increased capacity also comes increased surface area, being alloy it should displace heat quite effectively.

Have there been problems with the transmissions over heating? Not that I am aware of, I think its the old caravan philosophy, that you should monitor all the temps to avoid expensive breakages, better safe then sorry.

This is all conjecture on my behalf as I haven't fitted it yet & I don't know what the current normal temp is. When fitted I will keep a log of the temp's to see if there is really any benefit or not.

[08crd]

Originally Posted by multihull

Ah but have you considered that more fluid means once it's hot it will take longer to cool down too.
Did you know the Commanders have 4 cooling radiators systems at the front of the car?
engine coolant; transmission cooling; turbo intercooler; Whats the 4th one for, power steering?

I haven't heard of anyone having engine temp problems in a Grand or Commander except when the radiator was blocked with bugs or mud.
Have there been problems with the transmissions over heating?

The transmission fluid gets hot from converting engine power into propulsion power.
The more fluid that is available to absorb the heat generated, the better.

If less fluid is used, it still has to absorb the same amount of generated heat, therefore it gets hotter.
The cooling system also copes better, as it has forced circulation, the oil is returned to a larger pan and its residence time is increased.
Therefore it sits for a longer time, before it is returned to the torque converter, where work(heat) is added.
Simple thermodynamics.
The standard NAG1 (merc 5G) has 12 or 13 litres of oil from memory, which is a lot, it was used behind the V12 Merc engines.
This gearbox was used even when a newer box the Merc 7G gearbox was introduced.
The reason for using the NAG1 it was rated to 1079NM the newer 7G was only rated to 735 NM.
The only possible downside to adding a further 3 litres would be the decreased ground clearance.
As for the towing situation, it would just further enhance an extremely strong gearbox.
Only my humble opinion.