Thread: Why do 2.7 cranks break?

Originally Posted by PerthDisco

2720cc vs 2993cc so 10%

Urgh. Always one.

10.0367647058824% if you want to be like that.

Is this the end? Complete engine failure - Land Rover Discovery 3 / LR3 - YouTube

Latest Blockbuster video

Synopsis of failure cause theory starts at 36:50

That video describes what happened to my TDV6 at about 275,000KM. It siezed solid and the crank was unable to be turned even with a 1m long extension bar. Didn't break the crank though. I suspect that either the oil had lost some of its lubrication capacity or it was cumulative wear that was the trigger. The vehicle had been serviced regularly and oil changes were done as per the manual (2007 D3). When It failed it was at the end of two 700KM journeys pulling a trailer load of sheep so high load conditions and nearing a scheduled oil change. The part in the video where he suggests that you could sense that there was an engine problem was not true in my case, the engine stopped completely and terminally at 100 KM/h with no oil pressure warning or drop in power.

Regards,
Tote

Originally Posted by PerthDisco

Is this the end? Complete engine failure - Land Rover Discovery 3 / LR3 - YouTube

Latest Blockbuster video

Synopsis of failure cause theory starts at 36:50

I'm very much looking forward to the bit where they get to try and source properly fitting bearings. That seems to be one of the real sticking points for rebuilds as the clearances are critical.

Originally Posted by PerthDisco

Is this the end? Complete engine failure - Land Rover Discovery 3 / LR3 - YouTube

Latest Blockbuster video

Synopsis of failure cause theory starts at 36:50

Those guys are the greatest, some of the repairs they do is pretty good for "non professionals" if that's a thing. I mean I get a tad bored of doing engine changes but I don't mind seeing others do it without the bull**** like the other video. (they also do it with body on, argh how unfun is that)

I also get bored of all the theories out there of what causes it. As I have said many times, it's Jaguar Land Rover and their poor quality control in either building them or sourcing the components to build them. They make this choice like so many other manufacturers so they get to wear the less than stella reliability badge.

For a mechanic regardless of experience or knowledge to speculate or worse to matter of fact say what causes a failure with regards to crankshafts is a load of ****.
Quite simple if your not a mechanical engineer that specialises in engine design and everything related to such then how could you know.

As plenty of others on AULRO have pointed out, good servicing every 10K has got to give you the best chance.
Also not taking your Disco to a dealer for servicing has got to be a positive thing (haha I gota throw that in as the dealers in Perth are total **** at long term servicing and maintenance).

And while I can at times poo poo a Discovery 4 3.0lt its got to be one of the best 4x4s on the road.

Originally Posted by DazzaTD5

And while I can at times poo poo a Discovery 4 3.0lt its got to be one of the best 4x4s on the road.

It's also one of the best 4x4s on a flat bed. Best of both worlds!

Originally Posted by DazzaTD5

.................

And while I can at times poo poo a Discovery 4 3.0lt its got to be one of the best 4x4s on the road.

And off road?

(Not having a dig), DL

Originally Posted by 350RRC

And off road?

(Not having a dig), DL

Dazza took my prior D4 2.7 into the hills near Kalamunda some time ago and was pleasantly surprised by the performance. I'll leave him to comment further if he chooses