Diesel RR V8 turbo problems?
Discussion
My mate has had a 2008 V8 diesel Range Rover sport, 3.6 I think it is. Apparently he was having the occasional issue where it would go into limp mode but restart and it was fine again. Didn't happen that often.
A couple of weeks ago he had a full service by an independent RR garage, on the drive away from the service it went into limp mode and wouldn't come out of it, the garage took it back, hooked it up and diagnosed the EGR valve, changed it but it wasn't that and the fault is still there, they are now saying both turbos are faulty and want £5K to change them.
I've not seen the vehicle as its sat at the garage at the moment but is it not strange that this has happened right after the service, is there a common issue that happens to these engines? and why would both turbos need doing? It looks to me like the garage is just changing parts until they solve the problem.
It does quite a few short trips if that makes any difference.
A couple of weeks ago he had a full service by an independent RR garage, on the drive away from the service it went into limp mode and wouldn't come out of it, the garage took it back, hooked it up and diagnosed the EGR valve, changed it but it wasn't that and the fault is still there, they are now saying both turbos are faulty and want £5K to change them.
I've not seen the vehicle as its sat at the garage at the moment but is it not strange that this has happened right after the service, is there a common issue that happens to these engines? and why would both turbos need doing? It looks to me like the garage is just changing parts until they solve the problem.
It does quite a few short trips if that makes any difference.
Hmmmm. If it’s anything like the 6 cylinder in the Disco I’d be checking the hoses for splits. And I think my friend had an issue with a turbo actuator that just needed lubricting.
Edit: EGR valves on mine caused the engine fault light but certainly no limp mode issues.
Oh, and as the above post says, my Dad had issues with his MAF sensor putting it in limp mode but the AA man fixed that at the roadside, presumably by cleaning it.
Edit: EGR valves on mine caused the engine fault light but certainly no limp mode issues.
Oh, and as the above post says, my Dad had issues with his MAF sensor putting it in limp mode but the AA man fixed that at the roadside, presumably by cleaning it.
mickmcpaddy said:
I've not seen the vehicle as its sat at the garage at the moment but is it not strange that this has happened right after the service,
It looks to me like the garage is just changing parts until they solve the problem.
It does quite a few short trips if that makes any difference.
I've quoted 3 bits to comment on. The first part to me doesn't seem strange, it appears there's been plenty of advance evidence of there being an issue if some sort, it has been going into limp mode previously. Maybe it's more surprising it's lasted this long without becoming a proper issue. Had your mate attempted to diagnose the previous limp mode episodes or just ignored them as they went away? It's often the simple act of disturbing things during the service that can expose already present issues.It looks to me like the garage is just changing parts until they solve the problem.
It does quite a few short trips if that makes any difference.
2nd bit, probably fair. Is the garage a decent specialist or just a local garage? Might be worth seeking out recommendations for a specialist in the marque, can make a huge difference.
Short journeys, a hideously complicated RR diesel, don't think I could think of a less suited vehicle for doing short journeys exclusively. Wether it's the reason for this fault or not it's certainly not an ideal pattern of use, especially not for a modern diesel and particularly complicated one at that.
mickmcpaddy said:
I've not seen the vehicle as its sat at the garage at the moment but is it not strange that this has happened right after the service, is there a common issue that happens to these engines? and why would both turbos need doing? It looks to me like the garage is just changing parts until they solve the problem.
It does quite a few short trips if that makes any difference.
I would imagine that it has a variable geometry turbo and the actuators are bunged up with carbon crud, just like the EGR is. The issue is cause largely by short trips where it doesn't get hot enough for long enough to burn the crud off. I think, but will stand corrected, that they can often by cleaned up with oven cleaner, but it may have damaged the actuator if it's been trying to move the linkage against a lump of hard dirt. If it's gone into limp mode, it may well require a reset procedure. It does quite a few short trips if that makes any difference.
Tell the owner, to give it plenty of welly to get it hot to stop it happening again, or buy a more suitable car for the job.
Cheers for the replies, he did say the EGR's have been changed but I didn't know there were two, in fact he called them EDRs. so yess I think both have been changed.
He is the sort of bloke who always goes to a friend of a friend though, so he says Range Rover specialist, it may well be a backstreet mechanic that had worked on one once. I only found out about it last night when he said have you heard about my RR.
He is the sort of bloke who always goes to a friend of a friend though, so he says Range Rover specialist, it may well be a backstreet mechanic that had worked on one once. I only found out about it last night when he said have you heard about my RR.
mickmcpaddy said:
I've had a quick look on Europarts and the turbos are about £1500 each, I can't imagine they are easy to change. I will point him in the direction of that RR site but he's not really an internet type of person, he was in the pub when I met him last night.
When I had the two turbos replaced on my old TDV8 they were £1000 the pair off of Ebay. Fitting was another few hundred pounds. So not cheap, but not £5k either. The issue on that car that caused so much confusion was that the EGR valve head had snapped off in one of the EGR valves, Didn't trigger any error codes but certainly caused the car to run like a dog and leave a trail of black soot.
The specialist had never seen these symptons before, it was only when they physically stripped the EGR out and saw the snapped valve head did it add up. The EGRs had been replaced by the previous owner, with non-LR EGRs. The 'pattern/chinese' EGR valves had broken in a way the specialist had never seen before and the management systems were not able to detect it as the valve still moved as expected, but just didn't have any sealing head on it anymore!
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