Thread: 300tdi over heating

radiator needs rodding and the thermostat probably wants replacing.

Also check that the fans at the front are working, they should engage if the a/c is on or the temp goes to high.

FIT AN ENGINE MONITOR!!
more accurate reading of temp then, the temp gauge is only that a gauge and it lies.
previous info of rodding radiator cant hurt and from what i have read here almost aperiodic maintenance item
info from this forum suggests that the temp gauge only moves to hot when it is over 100C which is getting to be too late

all of the above is right

getting your radiator "rodded" at a radiator specialist with tanks off is the first point

costs around $100 if you remove it and take it in

but if you take the vehicle in they can also flush the block for you - take whatever parts need replacing (thermostat, water pump, p gasket, hoses and belt) (because they probably won't know where to find them at a good price)........... all of this will put the cost well above the simple radiator cleaning cost - but it is all stuff you can do yourself

if you can cope mechanically with problems can arise (like corroded bolts securing the water pump to the housing) you'll be ok

and if it costs a bit look at it this way - you'll then have a cooling system that will be ok for the next 100,000km +


FWIW, my advice would be NOT to replace the water pump without also replacing the "p" gasket between the pump housing and the block

If it was ok before you put the trailer on, the viscous coupling sounds the problem. They do not last forever.

Checked if the fans were working, they are not, checked fuses all seems good though not sure any fuses I found are any thing to do with electric fans, If I was to guess I would think Relay, Air con works but fans not going on, where would i check for relay or other????
Also noticed new water leak from back of water pump down side of block, Dam.
I can do basic mecanical stuff on the landy but wouldnt know where to start for water pump, will get mechanic to do that but surly i could check for a relay that works or not if i knew were it is, Where do I start. i couldnt even find where to empty the radiator unless it is at the bottom hose?
Any help greatly appreciated.

G'day mate,
Yup cooling system draining on a 300tdi disco is a bottom hose job (did mine on the weekend after re-rego-ing the old girl)
The waterpump on these motors really isn't that scary, have done mine a few times in the last 11 years of ownership. Your new leak will almost certainly be the P gasket mentioned earlier in the thread (there's a housing which bolts to the side of the block, this is the gasket in question TBH I have had more of these fail than waterpumps!)
The most important fan is the mechanical one, so having the thermo clutch checked is worthwile, however given you have a leak the symptoms sound to me like the cooling system could do with a good bleeding.

Good luck!

Originally Posted by Brettsky64

Checked if the fans were working, they are not, checked fuses all seems good though not sure any fuses I found are any thing to do with electric fans, If I was to guess I would think Relay, Air con works but fans not going on, where would i check for relay or other????
Also noticed new water leak from back of water pump down side of block, Dam.
I can do basic mecanical stuff on the landy but wouldnt know where to start for water pump, will get mechanic to do that but surly i could check for a relay that works or not if i knew were it is, Where do I start. i couldnt even find where to empty the radiator unless it is at the bottom hose?
Any help greatly appreciated.

your water leak is most likely to come from the "p" gasket I referred to above (post #5 I think), can cause some of the mounting bolts to corrode and get stuck

whoever removes the water pump will potentially risk breaking the water pump through bolts - not a big issue for an equipped workshop but can be harder to deal with at home on your own

IMHO the time has come to do the lot (it would have come around sooner or later) and then you'll have a fully functioning reliable cooling system for ages to come

also... have a think about how close it is to timing belt replacement time - it can be simpler to do it all at once

where you are located I'm not sure about reliable LR mechanics (they do need to be reliable LR mechanics) but I have bought parts from MR Automotive in Redcliff and found them quite helpful; HTH