Thread: 3.0 TDV6 broken crankshaft / engine rebuild

Originally Posted by PerthDisco

That tiny bit extra stroke increases the offset of the rod journal from the main crank journal compared to a 2.7 also just a few fractions without the room to beef up the metal in between.

Anyway, I think people generally have the mindset that manufacturers leave a huge amount of no risk untapped HP up their sleeve. I am not in this camp. It would be interesting if this engine was running a stock tune.

As far as I know stock tune.

Originally Posted by Fabsky

2010
200k

Thanks. My son who has a 2009 build at 290K was asking. He doesn't recall hearing about crankshaft issues with the very first 3.0 engines.

Originally Posted by disco gazza

Just shy of $11250 Aust.
Not bad..

DG

That's what I'm paying for my replacement engine - and then add labour to do the swap.

Hats off to the OP, thats a big job, but you look like you know what you are doing. I tried the same but i dont have the space, the time or the will to have a car out for that long.

Originally Posted by Graeme

Was it in Malaysia where LR tested all vehicles and replaced engines that failed the undisclosed test? Was it a test for vibration / balance?

No, it was in South Korea and China where all JLR vehicles with the 3.0ltr V6 diesel were ‘recalled’ for the ‘special inspection’.

Originally Posted by kelvo

No, it was in South Korea and China where all JLR vehicles with the 3.0ltr V6 diesel were ‘recalled’ for the ‘special inspection’.

So what did they "inspect",and how did they do it?

I didn't glean anything about the test at the time other than that the test was rather quick. I wondered if it was a vibration test, perhaps at specific revs and presumably with the serpentine belt and possibly the harmonic balancer removed.

Originally Posted by scarry

So what did they "inspect",and how did they do it?

Quote from someone who had theirs ‘inspected’ in China,
“The car was plugged into computer. There seemed to be a metal box with a pipe in and out about small shoe box size sitting on front cowl dont know what it was plugged into. Mine was also getting a new battery and a sport was parked next to mine getting test done. A lot of rev..idle etc they said mine would be next and would take 40 mins (mostly to get engine warm I suspect) as they were still changing battery i went for a light lunch expecting to return mid test but after 15 mins I returned it was all done.

They did add 500ml of oil(free) so i guess test required oil to max.

Not much else to say. I am sure some people can track the test code which was on the paper to find more info”

There was supposedly a 100% pass rate of the vehicles inspected.

Originally Posted by Fabsky

Yes that's right, it looks like none of the crankshaft shells have turned. On the other hand, it can be seen that one of the crankshaft support bearing shell is heavily worn. I think that it could be defective, which contributed to the beating of the shaft at both ends, which can be inferred from the visible worn outer shells. The crankshaft was subject to vibrations and due to material fatigue, it simply did not resist and cracked.

I would like to know the opinions of more experienced colleagues.

Can you see any obvious wear or damage to the engine harmonic balancer pulley?
I am wondering if this component should be a serviceable item at say, 100,000 to 150,000 klms.
Failure of this pulley could create sufficient vibration to cause the breakage, and I'd think the most likely break area would be pretty much where yours is because the front section of the shaft is satisfactorily supported by the front main bearing. The section between the front and second mains is where I'd expect some whip to develop if the balancer is playing up.
I'd suggest you get the broken shaft crack/fatigue tested out of interest as it will help you (and us!!) determine the cause.
.......and I still think you should discuss the situation with an engine race prep specialist who I'm sure would have a very strong opinion on the breakage when you show him the failed parts. These guys have seen all these problems on many occasions!