Jaguar Land Rover recall TDV6 engined vehicles

The Achilles heel of the SDV6 is the single oil gallery to main bearing between banks 2-5 and 3-6. All the others have 2 oil ports. Add to this that the oil gallery is too small, the thin webs and the significant step in the crank at that point to the corresponding counterweight, and its a perfect storm. Long oil service intervals, high soot levels block up the oulnport, bearing is starved of oil, seizes and grabs crank. High inertia forvthe adjoining conrods and pistons, plus the weak point at the crank and its the crank that let's go.

Use an engine flush at every second oil change to get the soot out, change oil every 10000km or less, and let the engine warm up before taking off seems to help. Use a low ash full synthetic oil that is to spec and genuine filters

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Originally Posted by Eric SDV6SE

The Achilles heel of the SDV6 is the single oil gallery to main bearing between banks 2-5 and 3-6. All the others have 2 oil ports. Add to this that the oil gallery is too small, the thin webs and the significant step in the crank at that point to the corresponding counterweight, and its a perfect storm. Long oil service intervals, high soot levels block up the oulnport, bearing is starved of oil, seizes and grabs crank. High inertia forvthe adjoining conrods and pistons, plus the weak point at the crank and its the crank that let's go.

Use an engine flush at every second oil change to get the soot out, change oil every 10000km or less, and let the engine warm up before taking off seems to help. Use a low ash full synthetic oil that is to spec and genuine filters

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Eric, just to clarify "Achilles heel of the SDV6" please. So does this single oil gallery NOT include the TDV6?

My understanding is the SDV6 is a bored out and tuned version of the TDv6 with the same internals, so by that logic, yes, same crank.

However, less torque and power, no sequential turboes etc. to give a decent whack of power.

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Originally Posted by Eric SDV6SE

My understanding is the SDV6 is a bored out and tuned version of the TDv6 with the same internals, so by that logic, yes, same crank.

However, less torque and power, no sequential turboes etc. to give a decent whack of power.

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Cheers Eric, but now you have me completely confused (not hard to do) with "bored out"? Is that in reference to the crankshaft, rather than cylinder bore, or?

With Cambo's magic, my TDV6 has about 700 Nm (similar and a bit less than the Rangie Sport apparently), so maybe I have the best of both worlds?

Larger cylinder bores etc to increase the engines swept capacity to 3000cc up from 2700cc. Same crank.

My SDV6 also had a tune, towed regularly and it was not driven gently. I had no crank issues in the 120000km of ownership.

Maybe it is just a lottery...

Just a silly thought. If the 3l tdv6 does not have the same problems as the sdv6, it surely can't be because the tdv6 has a dpf it seems it must be the lower power rating, so if you tuned the sdv6 down to the lower rating and not have a dpf it should be better than both.[bigwhistle]

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Originally Posted by sharmy

Just a silly thought. If the 3l tdv6 does not have the same problems as the sdv6, it surely can't be because the tdv6 has a dpf it seems it must be the lower power rating, so if you tuned the sdv6 down to the lower rating and not have a dpf it should be better than both.[bigwhistle]

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Except that the TDV6 does have the same issue and does randomly break crank shafts, it’s a design issue for both not a tune issue

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Originally Posted by Eric SDV6SE

My understanding is the SDV6 is a bored out and tuned version of the TDv6

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I think the confusion here is Gav has the 3.0L TDV6 (which from my understanding is the same as an SDV6 with a different tune) however you are referring to the 2.7L TDV6.

The 2.7 isn't immune. Our MY08 (build late 07) snapped a crank at about 120,000km.

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Originally Posted by discomatt69

Except that the TDV6 does have the same issue and does randomly break crank shafts, it’s a design issue for both not a tune issue

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I did word it a bit wrong but I have read somewhere on this site that it is not as predominant in the tdv6 as the sdv6.