Vehicle & Technical > Discovery

why is this

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muddyweb:
Just to echo what has been said....

The Tdi ought to be able to tow all day in the UK without problems...  

Some of the common causes :


Blocked or dirty radiator
Badly sealed cooling system (cap, hoses, etc)
Faulty Viscous Fan
Restricted Airflow because of accessories
Someone has "adjusted" the fuelling / turbo boost
Just trying to go too fast when towing ;-)
Low coolant levels
Weak anti-freeze mix (Anti-freeze improves the cooling efficiency)
Faulty Water Pump

My advice would be to check the condition of the cooling system and make sure it is clean and sealed properly.  A garage can do a pressure test on it.

Check and / or change the coolant and make sure you have the right concentration of anti-freeze

Make sure the viscous fan is doing its job.. it should be nice and stiff when hot.  (Check with the engine switched off ;-))

If the person towing is driving with their foot hard on the throttle all the time, then this will cause a lot more heat to be pumped into the engine, as the turbo is working hard all the time.  (This can also be caused if the turbo has been adjusted away from standard).   Backing off the throttle a bit can make the world of difference.

Assuming all of the above checks out a supplementary electric fan will help.

Porny:

--- Quote ---Assuming all of the above checks out a supplementary electric fan will help
--- End quote ---


But a good condtion 200Tdi shouldn't need one in this country....
If you fit a electric supplementary fan all you will be doing is masking a problem, not fixing it.

The Discovery has been tested by Land Rover in much hotter climates than here, if they'd found a need for an extra fan, they would have fitted one.

My 90, when it was a 200Tdi, would happily tow 2.5 - 3 tonne all day without getting too hot.... even at motorway speeds.
That was completely standard apart from a 'tweaked' pump and a higher turbo boost pressure.


Ian

muddyweb:

--- Quote from: "muddyweb" ---The Tdi ought to be able to tow all day in the UK without problems...  
--- End quote ---



 :-k   I just said that.

Porny:
oopps.... missed that bit  :roll:  #-o

Dave:
Thanks i will pass that on. The disco never goes off road purely for working on the road he bought it for towing so it does need sorting. Been trying to get him to join and ask him self.

 Thank's for the advice. :D

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