Thread: D4 specific questions

Originally Posted by 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

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

Originally Posted by discomatt69

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

Originally Posted by 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.? 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

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...

Originally Posted by 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...

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

Originally Posted by discomatt69

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

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.

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