Thread: What happened to your D3/D4 today?

Originally Posted by BradC

I looked at my D3 in the driveway today. It's been there since the tensioner went, and I've been driving dads LC200. After a weekend away with ~800KM on the clock it's pushed me to get the D3 going. The 200 is noisy and uncomfortable. Moreso as he had a "GVM Upgrade" done on it, so the back bounces like a pogo stick and the headlights point at the ground.

I can imagine at 80 with a 3T van on the back it's probably tolerable, but bare at 110 it's just bloody uncomfortable and tiring to drive.

Mine isn't D3 related.. but I had a trailer on the D2 the other day with some weight so I inflated the helper airbags. I haven't used them for ages and promptly forgot. I was out in it yesterday and couldn't work out what was wrong..

The winter has hit Tassie and it appears my Thermostat is stuck open. The Workshop Manual is indicating you can exchange the Thermostat without changing the housing. I cannot locate a Part Number for the Thermostat only which is installed in the housing LR009562. Is it a viable option to just replace the Thermostat and has anyone have a Part Number for it?

Originally Posted by Gravy

The winter has hit Tassie and it appears my Thermostat is stuck open. The Workshop Manual is indicating you can exchange the Thermostat without changing the housing. I cannot locate a Part Number for the Thermostat only which is installed in the housing LR009562. Is it a viable option to just replace the Thermostat and has anyone have a Part Number for it?

Thermostat is a big white blob at the bottom of the radiator accessible from below part of the radiator hose bundle. Sold separately.

Originally Posted by PerthDisco

Thermostat is a big white blob at the bottom of the radiator accessible from below part of the radiator hose bundle. Sold separately.

Maybe someone can remove the confusion. The Discovery 4 workshop manual has clear images depicting that the thermostat can be removed from its housing on a TDV6 3.0 Diesel. I have been advised that the housing is a sealed unit and the thermostat can not be exchanged, even more confusing is that listed for sale is the stand alone thermostat Gates Part Number TH4582G1 which is li stated as being correct for this model and year vehicle.

Appreciate if an owner of this vehicle who has exchanged the thermostat can confirm that the Workshop Manual is correct prior to me commencing to dismantle.

You might want to take the opportunity to replace the 10yo plastic housing which could be so brittle that it shatters if you try to dismantle it. I recently decided to replace all the cooling system hoses and plastic fittings on my 12yo L322 during a radiator replacement and I was very pleased that I did as several fittings broke during removal.

Originally Posted by Gravy

Maybe someone can remove the confusion. The Discovery 4 workshop manual has clear images depicting that the thermostat can be removed from its housing on a TDV6 3.0 Diesel. I have been advised that the housing is a sealed unit and the thermostat can not be exchanged, even more confusing is that listed for sale is the stand alone thermostat Gates Part Number TH4582G1 which is li stated as being correct for this model and year vehicle.

Appreciate if an owner of this vehicle who has exchanged the thermostat can confirm that the Workshop Manual is correct prior to me commencing to dismantle.

I can confirm it is possible and I have done it. I don’t remember much as it was seven years ago, but looking through my email I have the same part number purchased and I know I replaced it into the same housing, but that was at seven years of age. It’s now had its 14th birthday.

Originally Posted by DiscoJeffster

I can confirm it is possible and I have done it. I don’t remember much as it was seven years ago, but looking through my email I have the same part number purchased and I know I replaced it into the same housing, but that was at seven years of age. It’s now had its 14th birthday.

There must be a difference with the 3.0 maybe my mistake as on the 2.7 it sits independently in the tangle of radiator hoses with about 5 hose connections on it. You replace the whole unit.

I’ve also recently bought the full hose set (and new. radiator) which comes with new thermostat, temp sensor and top radiator hose I had previously replaced the thermostat only as a seperate part.

Like Graeme plastic seems to be giving up left right and centre. I recently bumped the return hose to the bottle which snapped off at the radiator fortunately leaving about 1cm of barb which is holding the fort currently. My temp sensor is restrained with a cable tie due to the locking mechanism cracking.

The trickiest part of the job is dealing with the pressure clamps where one of those extension removal gizmos is incredibly helpful.

Originally Posted by PerthDisco

There must be a difference with the 3.0 maybe my mistake as on the 2.7 it sits independently in the tangle of radiator hoses with about 5 hose connections on it. You replace the whole unit.

I’ve also recently bought the full hose set (and new. radiator) which comes with new thermostat, temp sensor and top radiator hose I had previously replaced the thermostat only as a seperate part.

Like Graeme plastic seems to be giving up left right and centre. I recently bumped the return hose to the bottle which snapped off fortunately leaving about 1cm of barb which is holding the fort currently. My temp sensor is restrained with a cable tie due to the locking mechanism cracking.

The trickiest part of the job is dealing with the pressure clamps where one of those extension removal gizmos is incredibly helpful.

Yes, they are different though no less a PITA to remove. And yes, hose clamp cable thing always comes in handy