Thread: TDV6 crank and crank bearing failures

Originally Posted by Pippin

Does anyone know what the failure rate is? is it 1in100; 1in1,000 or greater.
Nick

From what i have read its around 1.5-2%.

Originally Posted by loanrangie

From what i have read its around 1.5-2%.

I've read that too but never with substantiation or any facts.
The UK forums and groups seem particularly bad for talking in endless circles about the subject.
Have you come across anything concrete?

Cheers,
Scott

Premature engine failure in one or two vehicles out of every 100 is terrible. Surely it can’t be that high a rate of failure.

Im sure this has been covered before...

From Wiki:Land Rover Discovery - Wikipedia scroll to the bottom to the table of total sales

(Taken with a bucket of salt of course)

Total Discovery 3 and 4 series sales since 2009: 353,614 taking off 2016 and 2015 models, where i believe the crank issue has been resolved, i guesstimate around 250,000 vehicles. 1.5% failure represents 3750 failures, 2% 5000 failures.

Both those values seem very unlikely IMHO.

My conservative estimate woul be around 200 failures globally, if that. This is then 0.08%. While still not acceptable for those that it happened to, this is perjaps more realistic. Even if 500 failures globally, this is 0.2%.

Note im not including the 2.7tdv6 in the Ford territory, as i am not aware of crank failures in those engines / cars (lighter duty??). As a rough estimate, assuming the same amount of 2.7s fitted to those, the failure rate is closer to 0.04%.

This is just my opinion, someone smarter than me has probably already tallied all the failures.

For me, ill just keep driving my 3.0, service it regularly using quality oils and filters, and hope for the best. Maybe im out of the danger zone?

Originally Posted by Eric SDV6SE

Im sure this has been covered before...

From Wiki:Land Rover Discovery - Wikipedia scroll to the bottom to the table of total sales

(Taken with a bucket of salt of course)

Total Discovery 3 and 4 series sales since 2009: 353,614 taking off 2016 and 2015 models, where i believe the crank issue has been resolved, i guesstimate around 250,000 vehicles. 1.5% failure represents 3750 failures, 2% 5000 failures.

Both those values seem very unlikely IMHO.

My conservative estimate woul be around 200 failures globally, if that. This is then 0.08%. While still not acceptable for those that it happened to, this is perjaps more realistic. Even if 500 failures globally, this is 0.2%.

Note im not including the 2.7tdv6 in the Ford territory, as i am not aware of crank failures in those engines / cars (lighter duty??). As a rough estimate, assuming the same amount of 2.7s fitted to those, the failure rate is closer to 0.04%.

This is just my opinion, someone smarter than me has probably already tallied all the failures.

For me, ill just keep driving my 3.0, service it regularly using quality oils and filters, and hope for the best. Maybe im out of the danger zone?

Where does the 200 worldwide come from? Only a very small fraction of D3 and D4 owners frequent and post on web sites.

Cheers

There’s a yes/no “has your engine blown up” survey on Disco3 and it reports a high percentage of yes recipients and looks pretty bad.

But - the total respondents to the survey is in the 100s whereas subscribers to Disco3 is like 43,000. There is a very large silent majority.

I did post the stats here somewhere.

Originally Posted by ozscott

Where does the 200 worldwide come from? Only a very small fraction of D3 and D4 owners frequent and post on web sites.

Cheers

Like i said, just my opinion / guesstimate.

What would be your estimate of engine failures related to crankshaft or main bearing failures for this engine series?

Considereing that, the proportion of engine failures because of that as a root cause as opposed to say, bent conrods from oil surge, failed piston rings, damaged valve train from oil pump tensioner failing, suddenly the percentage gets smaller again.

My point being that "1.5 -2%" seems to me unrealistic, my guess is its closer to 0.04% or even lower.

Originally Posted by Eric SDV6SE

Im sure this has been covered before...

From Wiki:Land Rover Discovery - Wikipedia scroll to the bottom to the table of total sales

(Taken with a bucket of salt of course)

Total Discovery 3 and 4 series sales since 2009: 353,614 taking off 2016 and 2015 models, where i believe the crank issue has been resolved, i guesstimate around 250,000 vehicles. 1.5% failure represents 3750 failures, 2% 5000 failures.

Both those values seem very unlikely IMHO.

My conservative estimate woul be around 200 failures globally, if that. This is then 0.08%. While still not acceptable for those that it happened to, this is perjaps more realistic. Even if 500 failures globally, this is 0.2%.

Note im not including the 2.7tdv6 in the Ford territory, as i am not aware of crank failures in those engines / cars (lighter duty??). As a rough estimate, assuming the same amount of 2.7s fitted to those, the failure rate is closer to 0.04%.

This is just my opinion, someone smarter than me has probably already tallied all the failures.

For me, ill just keep driving my 3.0, service it regularly using quality oils and filters, and hope for the best. Maybe im out of the danger zone?

Post 23 above is a 2015 MY with 25k approx and dead motor.

One would hope they fixed them before D5 but can see they had much incentive with the new model and all new engines coming out...

Cheers