Thread: Why do 2.7 cranks break?

Originally Posted by PerthDisco

And then you get Outback Discovery with his tensioner failure on a high miler early D3 with original oil pump. (The Russian video suggested early oil pumps had less pressure than updated pumps) I’ve asked him to strip the crank to see what his bearings look like after this time.

Do you know what KM’s Outback’s Discovery was at?

I would be gutted to have had asked the question and been assured the oil pump had been replaced and upgraded only to find out this was a lie.

Originally Posted by V8Ian

It certainly appears to be a minimalist design, possibly taken too far.

One now needs some minimalist Araldite to repair them. Job done.

So after 9 pages of coments,the OP still hasnt got a difinitive answer.

Originally Posted by scarry

So after 9 pages of coments,the OP still hasnt got a difinitive answer.

Quote

We received many comments on our last three videos about the major engine repair going on. We are thankful about every comment, even if the Toyota drives tell us that LR vehicles are no good and that we should buy a Toyota. That´s ok. I don´t think that any LR owner disagrees with the fact that Toyotas are more reliable. I mean more reliable than most cars out there. But cars are all about emotions for me and Vera. And a Toyota just triggers nothing in me, other than a bit of respect towards the reliability. Still, we try to attract as many Toyota drives to our channel as we hope that they like to see how crazy LR drivers are and what they will do to fix their vehicles (to their wallet or knuckles, lol) . Don´t we all shake sometimes our heads if people tell us how much the surgery of their dog was or their horse? See, it´s like this with a LR. The Toyota driver, focusing on reliability, tells the doctor: don´t waste your time, give it the shot. Remember, I am referring to vehicles which are 12-15 years old. A LR3 is at least 12 years old and up to 15 years. I am not referring to vehicles older or younger than this. Reliability is just not that important to a LR driver I think. And we love our dogs and horses, even if they limp a bit and may be blind on one eye. They became 15 years old! This puts them onto the map, right? Even on a Toyota scale. Now I actually wanted to write about the most asked question: What is the reason for the TDV6 and SDV6 crankshaft failure? There is endless material out there and lots to learn. One thing I found out is, that we are not talking about a single problem or a single solution to the problem. Like use this or that oil lor change it more often. I learned that the problem is much mor complex and there are many failure modes (this is how automotive engineers call this). Just on the top of my head, I list the most important contributing factors here - which will cause a TDV6 engine failure, in particular bearing failure, IN THE LONG RUN: 1. Poor oil, wrong oil 2. Insufficient oil change frequency 3. Long stand still times between starts 4. Starts at cold climate conditions (with low crank rpm) 5. Outdated oil pump 6. Other problems causing prolonged crank times or rough starts (like bad HPFP, bad glow plugs, etc.) The list is endless. Please add any reason you think is contributing to the problem in the comments section. Toyota drivers: Spare the comment "bad engine design" Lol. In the picture you see the start cycle of our TDV6 LR3 (2006 with 235t km). The red line is engine rpm. You can see how perfectly the starter motor gets the engine to speed. Once the engine kicks in, you see the rpm drop to idle. This is very good because the oil pump delivers pressure as quick as possible this way. Also note that the voltage (light blue) is not caving in by much. It´s not perfect but still good. Then note how quickly the HPFP delivers the required starting fuel pressure (purple). Also note that the glow plugs (dark blue) stay on even after ignition for many seconds. It was 5°C that day. They do not turn off right after start. I measured this with the GAP IID tool which we own now for a few weeks. Thank you all for your comments and watching our videos. Christian

I noticed there are "Upgraded" cranks available now as a preventative upgrade, cant be thicker but claim to be stronger i guess

RANGE ROVER LAND ROVER 3.0 TDV6 FORGED CRANKSHAFT + MAIN & BIG END BEARINGS SET | eBay

Also for anyone wondering, here is TDV6 vs TDV8 crank for comparison, much thicker !

DISCO3.CO.UK - View topic - Range Rover 3.6 TDV8 - anyone got a head gasket?

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V8 crank is a beast and when compared, the difference is stark.

Originally Posted by haydent

Also for anyone wondering, here is TDV6 vs TDV8 crank for comparison, much thicker !

DISCO3.CO.UK - View topic - Range Rover 3.6 TDV8 - anyone got a head gasket?

uuu.JPG

So, there is nothing wrong with the original design? I call bollocks. That one looks like a decent crankshaft should look & not one made from Tissue Paper.