D4 specific questions

[Bulletman]

Gday All,
So I have a couple questions which relate to D4 , I did try to search this but read lots of threads with no real definitive answer .
So what is the difference between SDV6 and TDV6.? My original thought was it was the early D3 engine but it seems the TDV6 is twin turbo in the D4.
Also in relation to the deisel engine model , is the D4 suffering the HPFP issues in the later years say 2014 onwards..
The failing of the manifolds, was this fixed in later models,? From what I read I cant see anything to suggest so, but is there a km range they are failing in ?
Is the manifolds issue happening on both SDV6 and TDV6 engines.

Thanks and cheers Bulletman

[discomatt69]

Gday All,
So I have a couple questions which relate to D4 , I did try to search this but read lots of threads with no real definitive answer .
So what is the difference between SDV6 and TDV6.? My original thought was it was the early D3 engine but it seems the TDV6 is twin turbo in the D4.
Also in relation to the deisel engine model , is the D4 suffering the HPFP issues in the later years say 2014 onwards..
The failing of the manifolds, was this fixed in later models,? From what I read I cant see anything to suggest so, but is there a km range they are failing in ?
Is the manifolds issue happening on both SDV6 and TDV6 engines.

Thanks and cheers Bulletman

Engines are exactly the same, just the tune is different, both twin turbo, no idea on HPFP issues, manifolds have continual "upgrades " apparently but the later ones will more than likely still fail , after all its still the same basic design but maybe the changed ribbing on the later ones may make a difference. Whether it is enough of the difference to remove the failure all together I doubt that very much

[Bulletman]

Engines are exactly the same, just the tune is different, both twin turbo, no idea on HPFP issues, manifolds have continual "upgrades " apparently but the later ones will more than likely still fail , after all its still the same basic design but maybe the changed ribbing on the later ones may make a difference. Whether it is enough of the difference to remove the failure all together I doubt that very much
Thanks, interesting with the manifolds as its basically the same engine as the D3 and no failure that I can find, so obviously the extra HP and associated higher pressures from 2 turbos is enough to cause the failure so would be an interesting ratio of TDV6 to SDV6 failures.
Cheers Bulletman

[kelvo]

Gday All,
So I have a couple questions which relate to D4 , I did try to search this but read lots of threads with no real definitive answer .
So what is the difference between SDV6 and TDV6.? 3.0ltr engines are mechanical identical. My original thought was it was the early D3 engine but it seems the TDV6 is twin turbo in the D4.
Also in relation to the deisel engine model , is the D4 suffering the HPFP issues in the later years say 2014 onwards. Not that I’m aware of.
The failing of the manifolds, was this fixed in later models? The manifolds had various revisions, my MY14 TDV6 with 160,000Km is still currently on the factory manifolds. From what I read I cant see anything to suggest so, but is there a km range they are failing in ? No idea.
Is the manifolds issue happening on both SDV6 and TDV6 engines.Yes can happen to both engines.

Thanks and cheers Bulletman
See my answers in red

[Jpdv]

Yup, the lower state of tune is one of the reasons I 'seized' a late model 8 speed TDV6 - it's about as safe as you can get with respect to potential reliability, I hope - no guarantees, but it's the best combo of least stressed engine and bullet proof transmission, if you drive/service with care...

[discomatt69]

Yup, the lower state of tune is one of the reasons I 'seized' a late model 8 speed TDV6 - it's about as safe as you can get with respect to potential reliability, I hope - no guarantees, but it's the best combo of least stressed engine and bullet proof transmission, if you drive/service with care...

Ah yes but the SD tunes is sooooo nice, vroom vroom
After 6 years of ownership I still get a grin moving 3 ton as fast as it does when you blow out the cob webs

[Eric SDV6SE]

Ah yes but the SD tunes is sooooo nice, vroom vroom
After 6 years of ownership I still get a grin moving 3 ton as fast as it does when you blow out the cob webs

Exactly, and with a ecu flash tune and evc the grin just gets wider.... really want the manta 3" mandrel bent 409 stainless exhaust, but 3k is a bit steep

[Moggymitch]

I had the left manifold replaced in December and the right replaced in January on a 2012 SDV6 at just under 200k kms.

Both failed with cracking.

[southseas]

I'm replacing both sides inlet manifold this month after passenger side cracked - SDV6 160k km.

[101RRS]

When the D4 was released the SDV6 was the 3.0 engine and the TDV6 was the 2.7.

After the 2.7 TDV6 was dropped it was replaced by a lower tuned 3.0 called the TDV6.

As mentioned the 3.0 SDV6 and the 3.0 TDV6 are the same engine but with the TDV6 in a lower state of tune. Why LR did this never seemed logical to me - just go with the one state of tune.

[Bulletman]

When the D4 was released the SDV6 was the 3.0 engine and the TDV6 was the 2.7.

After the 2.7 TDV6 was dropped it was replaced by a lower tuned 3.0 called the TDV6.

As mentioned the 3.0 SDV6 and the 3.0 TDV6 are the same engine but with the TDV6 in a lower state of tune. Why LR did this never seemed logical to me - just go with the one state of tune.

It's called marketing and $$$ , sell 1 as more kw for more $$. If you read the specs as supplied to me by a fellow forum member the 2011 tdv6 is the same kw as the sdv6 and 2012 tdv6 is only 155kw instead of the previous 180kw.
Funny that.
Cheers Bulletman

[DiscoJeffster]

When the D4 was released the SDV6 was the 3.0 engine and the TDV6 was the 2.7.

After the 2.7 TDV6 was dropped it was replaced by a lower tuned 3.0 called the TDV6.

As mentioned the 3.0 SDV6 and the 3.0 TDV6 are the same engine but with the TDV6 in a lower state of tune. Why LR did this never seemed logical to me - just go with the one state of tune.

Not exactly. There was no SDV6 when it was released. It was badged as a 3.0 TDV6, but was 184kw. This is what I own.

When they dropped the 2.7 that when they went to the TDV6/SDV6 to differentiate the two in tuning.

[Eric SDV6SE]

I understood the TDV6 was available in 155kW low tune and 180kw high tune. The SDV6 i have started with 188kW.

[veebs]

I understood the TDV6 was available in 155kW low tune and 180kw high tune. The SDV6 i have started with 188kW.

I thought the same. 180/184/188kw all being a state of tune only though. Mine is perfectly happy at a little over 200kW now.

[DiscoJeffster]

I understood the TDV6 was available in 155kW low tune and 180kw high tune. The SDV6 i have started with 188kW.

You’re confusing things here. Read my post above. This only applied in the early model years. Once there was only a 3L engine in the family, TD/SD related to the tune low/high power. In the early years 2010/11 there was no SD variant, only 2.7L and 3L engines

[josh.huber]

You’re confusing things here. Read my post above. This only applied in the early model years. Once there was only a 3L engine in the family, TD/SD related to the tune low/high power. In the early years 2010/11 there was no SD variant, only 2.7L and 3L engines

I've got a my11 SDV6

[DiscoJeffster]

I've got a my11 SDV6

Ok maybe it was only 2010 year thing.

[scarry]

The SDV6 3.0L arrived in 2010,D4.

The TDV6 D4 was the 2.7L which ran 2010,until MY12,then was replaced with the TDV6 which was low tune 3.0L,and same time 8sp auto also arrived in both 3.0 L engine variants.

[DiscoJeffster]

The SDV6 3.0L arrived in 2010,D4.

The TDV6 D4 was the 2.7L which ran 2010,until MY12,then was replaced with the TDV6 which was low tune 3.0L,and same time 8sp auto also arrived in both 3.0 L engine variants.

My car is a 2010 TDV6 3.0L HSE with the 180kw tune.

redbook.com.au (https://www.redbook.com.au/cars/details/2010-land-rover-discovery-4-tdv6-hse-auto-4x4-my10/SPOT-ITM-244754)

The key difference is mine is the MY10 build. You’re right, in MY11 build they introduced the term SDV6 which was also happened to be in 2010.

[veebs]

Brought in to reduce confusion, which has obviously worked well :-)

[Eric SDV6SE]

My car is a 2010 TDV6 3.0L HSE with the 180kw tune.

redbook.com.au (https://www.redbook.com.au/cars/details/2010-land-rover-discovery-4-tdv6-hse-auto-4x4-my10/SPOT-ITM-244754)

The key difference is mine is the MY10 build. You’re right, in MY11 build they introduced the term SDV6 which was also happened to be in 2010.


So to add (or clarify) to the confusion, mine is a Dec2010 built, MY11 SDV6SE 3.0l sequential turbo diesel with the 188kW factory tune.....

[Arapiles]

I saw a D4 with factory 18 inch wheels the other day .....

[DiscoJeffster]

I saw a D4 with factory 18 inch wheels the other day .....

Which was the case for the 2.7 equipped vehicles as they didn’t get the larger brakes from the 3L specification.