Thread: Getting 2018 D5 SD4

A buddy of mine just had his D5 4cyl diesel replaced under extended warranty at low kms. Took 5 months off the road waiting to get a new motor.

I wouldn't have thought it was that hard to get DPF right. Mitsubishi have as a procedure that is undertaken by the vehicle and not having to introduce a switch as Toyota did. LR should be able to get it sort it. Cheers

Originally Posted by BradC

The DPF load is both calculated by an estimated soot value in the ECU and measured by a differential pressure sensor across the DPF. The DPF loads up and requires burn-off.

All DPFs require active regeneration (burn off). That requires a significant increase in exhaust temperature and there's 2 ways to do it. The first is a downstream injector that pumps diesel into the exhaust pre-dpf. I believe some GM units do that. The other is extra diesel injection on the exhaust stroke. That's also very common among other vehicles.

So while there may be a design issue with the algorithm on those LR engines, it's a very common method of regeneration, and in fact has been used on DPF equipped Discovery diesels since the EU4 D3.

DPF equipped vehicles are just not suitable for short trip shopping trolleys.

Just a follow up. It turns out that the SD4 motor fail at 45,000 km was caused by failure of cylinder one’s cooling oil jet. I understand that there were a couple of these failures in the early SD4 motors. Cylinder one and cylinder four were most vulnerable. The dealer informed that the issue is rectified with minor changes made in later motors.

I was wondering if anyone could provide some advice.

Our 2018 Discovery SD4 SE with 80,000km had a sudden catastrophic engine fail friday afternoon before Christmas. I was on the freeway before the car went limp and a warning immediately appeared on the dash saying 'critical oil required', so I pulled over and called roadside assistance to get towed.

Unfortunately we couldn't find a mechanic 'including the closest LR dealer' who would accept a towed vehicle so it is currently at our local mechanic who is closed until 15th January and is unable to repair it anyway.

We have had mechanics look at it and surmise that a pistons has broken through the cylinder wall.

The car has full service history with LR, had a blue slip and full service in the month prior with no indication there was potential for a sudden 'catastrophic engine failure'. I plan on getting a full diagnostic of the engine failure which I assume will require the engine needing to be removed, so it seems logical to get a new engine installed at the same time.

My question is if you were in my situation would you replace the engine and what with?

And where would you take it? My closest biggest service centre is Nowra so I'd preferably like someone to do the work local so I don't have to travel too far if anything goes wrong afterwards. Does it matter since it's out of warranty and requires a new engine who does the work as long as they are reliable?

I'd appreciate any advice.

Many thanks

Originally Posted by 80kmBomb

I was wondering if anyone could provide some advice.

Our 2018 Discovery SD4 SE with 80,000km had a sudden catastrophic engine fail friday afternoon before Christmas. I was on the freeway before the car went limp and a warning immediately appeared on the dash saying 'critical oil required', so I pulled over and called roadside assistance to get towed.

Unfortunately we couldn't find a mechanic 'including the closest LR dealer' who would accept a towed vehicle so it is currently at our local mechanic who is closed until 15th January and is unable to repair it anyway.

We have had mechanics look at it and surmise that a pistons has broken through the cylinder wall.

The car has full service history with LR, had a blue slip and full service in the month prior with no indication there was potential for a sudden 'catastrophic engine failure'. I plan on getting a full diagnostic of the engine failure which I assume will require the engine needing to be removed, so it seems logical to get a new engine installed at the same time.

My question is if you were in my situation would you replace the engine and what with?

And where would you take it? My closest biggest service centre is Nowra so I'd preferably like someone to do the work local so I don't have to travel too far if anything goes wrong afterwards. Does it matter since it's out of warranty and requires a new engine who does the work as long as they are reliable?

I'd appreciate any advice.

Many thanks

I would get it to a dealer,as a huge number of these engines have failed.
If it has good service records they may help,if it doesn't you may be on your own.

Good luck with it.

Originally Posted by ozscott

I wouldn't have thought it was that hard to get DPF right. Mitsubishi have as a procedure that is undertaken by the vehicle and not having to introduce a switch as Toyota did. LR should be able to get it sort it. Cheers

Toyota also have a DPF guage,so one can see how blocked the DPF is,and watch it cycle.

Never had to use the burn switch in any of our Tojos,and some are around 8 yrs old.
Or for that matter had a DPF issue.

We dodged the problematic models,which was just coincidence.

Originally Posted by 80kmBomb

I was wondering if anyone could provide some advice.

Our 2018 Discovery SD4 SE with 80,000km had a sudden catastrophic engine fail friday afternoon before Christmas. I was on the freeway before the car went limp and a warning immediately appeared on the dash saying 'critical oil required', so I pulled over and called roadside assistance to get towed.

Unfortunately we couldn't find a mechanic 'including the closest LR dealer' who would accept a towed vehicle so it is currently at our local mechanic who is closed until 15th January and is unable to repair it anyway.

We have had mechanics look at it and surmise that a pistons has broken through the cylinder wall.

The car has full service history with LR, had a blue slip and full service in the month prior with no indication there was potential for a sudden 'catastrophic engine failure'. I plan on getting a full diagnostic of the engine failure which I assume will require the engine needing to be removed, so it seems logical to get a new engine installed at the same time.

My question is if you were in my situation would you replace the engine and what with?

And where would you take it? My closest biggest service centre is Nowra so I'd preferably like someone to do the work local so I don't have to travel too far if anything goes wrong afterwards. Does it matter since it's out of warranty and requires a new engine who does the work as long as they are reliable?

I'd appreciate any advice.

Many thanks

Really your only economical choice ( yeah right ) is for a replacement SD4, hopefully JLR come to the party on a well known issue.