L322 Range Rover Low Coolant Warning

My 2002 L322 Range Rover keeps loosing engine coolant!!!

However there are no leaks under the car.

There is no engine oil contamination, congealing.

There is no steam coming from the exhausts.

I did see the other day after a hard drive that it had vented some water out of the header tank.

It doesnt do this all the time, sometimes you can drive a 1000 miles with no loss, other times you can drive it hard for 10 miles and get the low coolant light on.

Help required if you can

Petrol or diesel?

Datatek

It is the 4.0 petrol BMW engine.

4.0 petrol L322?? No such thing - if its 2002 then either its an early 4.4 L322 or its a one of the last 4.0 P38.

Id look for a pinhole in one of the hoses..

hows the state of the water pump area??

Definately not a P38, it is a 2002 L322 and all the documents state it is a 4.0 V8 petrol as well as DVLA documents.

Juiceyv8

All hoses dry, no leaks or drips around the engine and the pump area is dry.

Could it be anything to do with the thermosat not working correctly and it is venting water overboard when I drive it?
when it shows a low coolant warning sometimes I have to put a couple of litres of water into it other times no water is required.

stat could be sticking or hgf

fastjet45 said:

Definately not a P38, it is a 2002 L322 and all the documents state it is a 4.0 V8 petrol as well as DVLA documents.

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My 96 spares dog is an auto, the docs say it's a manual. No evidence that it has ever been changed from manual to auto and it has a full service history.

fanatic said:

stat could be sticking or hgf

Click to expand...

I'd second a faulty thermostat. They are controlled by the powertrain ECU but when they stop working properly, they don't throw a code or anything, so you need to watch Testbook live data.

Thank you for your replies I will try changing the thermosat and see if that cures the problem.

I'm having the same problem with my supercharged model.every three four months I have to fill the coolant with water or the actual coolant liquid. I have not noticed any leaks nor faulty messages. Wii take it for service in 2000 km and see what happens. I dont do large distances. By the way fastjet45 its good to know what kind of engine you carry man!!!!

Hi fastjet,

Did find what the problem was as I have the same issue with an 02 4.4V8 Petrol L322?

This thread is approaching 3 years old and the OP's last activity on the forum was August 2012!

Are you experiencing any witness marks of dried coolant or puddles anywhere?

They are prone to radiator leaks, expansion tank leaks and Water Pumps going pop.

Less common, but still well known is the Valley Pan gaskets leaking, Heater Valves leaking and the heater matrix leaking (although you'd notice this one inside the car).

Alternator housings have been known to leak, but reports are rare and hoses do perish...

I am due to replace one of mine that has developed a small weep around an electrical connection.

Get underneath, remove the undertray/splash guard and see if you can spot anything....it is wise to leave this off for a few days (but don't go puddle splashing), that way any drips will fall onto the ground making locating the potential leak easier!