What happened to your D3/D4 today?

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Originally Posted by gavinwibrow

Easy to take out? Looks like a snug fit.

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It is and light which is what I was aiming for, can remove it in 2 minutes.

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Originally Posted by BradC

The returned fuel only goes to the filter in the EU3 D3s (<2007 I suppose). The early filter was designed to return warmed fuel through the filter to try and reduce gelling in cold weather. This has a thermostatic bypass to prevent the filter from cooking and once warm the flow is diverted to the tank. That configuration was removed with the move to EU4 . EU4 D3s and all D4s return straight to the tank.

The Volume control valve is a component of the high pressure fuel pump. The fuel enters the pump via a vane feed pump, through the VCV which recirculates fuel when under light load. It then passes to the high pressure pump and the spill from the PCV on the pump output goes back to the return line along with a small low pressure flow that passes through the pump housing to cool and lubricate.

I don't have first hand experience with the early EU3 discos, so there may well be something there that's not in the manual, parts list or system descriptions. But there is certainly no significant back pressure in the return line on my EU4 D3. The 2.7 D4's use the same fuel configuration.

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Soooo, what is the purpose of this restrictor?
I'll try to confirm year/s of the two cars involved.

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Originally Posted by Discodicky

Soooo, what is the purpose of this restrictor?

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Given your mate machined up new ones he'll be able to tell you how long and what diameter the orifice is, and from that we can calculate the pressure drop at various flow rates, acknowledging that will vary significantly with the viscosity of the diesel (winter/summer blends and fluid temperature). That might give some more context with which to answer that question.

Oil change yesterday, park brake adjust rotation..

Walk in shed today. Coolant on floor, swear at car, prepare to set fire to car, pull guards off, realise I didn't push a coolant quick connect home fully about a month ago.. Lucky I didn't blow the car up.

Said sorry to car for swearing and threatening with fire.

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Originally Posted by josh.huber

Oil change yesterday, park brake adjust rotation..

Walk in shed today. Coolant on floor, swear at car, prepare to set fire to car, pull guards off, realise I didn't push a coolant quick connect home fully about a month ago.. Lucky I didn't blow the car up.

Said sorry to car for swearing and threatening with fire.

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One should never apologise. It’s a sign of weakness with Land Rover ownership. You now have invited months of mental anguish.

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Originally Posted by DiscoJeffster

One should never apologise. It’s a sign of weakness with Land Rover ownership. You now have invited months of mental anguish.

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Oh if it's called for I'll threaten to again. But this was on me.

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Originally Posted by Macadamia

oh so pretty important! haha [tonguewink]

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The ECM under the bonnet has an external factory "computer fan"!? OMG [bigsad]

Attachment 175566

For those discussing the fuel flow, this is the diagram i have .

Bulletman

After my 20yo GME TX3400 decided to give up just before my trip last Sunday i looked into problem solving it but got no where, found a drop-in replacement in the form of a TX3520. Fits the same bracket for the remote head so it was just plug n play, and its an 80 ch unit so now with the times.

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Originally Posted by loanrangie

After my 20yo GME TX3400 decided to give up just before my trip last Sunday i looked into problem solving it but got no where, found a drop-in replacement in the form of a TX3520. Fits the same bracket for the remote head so it was just plug n play, and its an 80 ch unit so now with the times.

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It’s great that GME form factor remains basically unchanged.

When I went from the earlier units to my full commercial ones only the power feeds needed upgrading.