Broken Turbo

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Originally Posted by bidds

uestion:
Is there any value in putting a VNT into my truck (D2a) given I'm not going to mod the airbox, change the intercooler or remove the Mantec snorkel?

I'm in comms with BAS and td5inside and getting the impression that I might be best off just fixing or replacing the standard turbo.

I was planning to go with the S208-1 and a close-to or totally stock map. Jose' from td5inside is happy to do a map to suit.

Many thanks for facts, thoughts, opinions :)

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Depends on the price difference between the standard turbo (either through reconditioning your current one if suitable, a second hand replacement or a new replacement) and the VNT. If the prices are similar, definitely go the VNT. Even on a standard vehicle you'll get an improvement. BAS have previously confirmed that their VNT kit can be installed on a standard motor.

Also remembering that diesel motors run cooler when they're AFR's are lean. So the VNT may result in lower EGT.

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Originally Posted by bidds

How much larger should the intercooler be? Would the D2a version be considered usefully bigger?

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The D2a intercooler is larger and superior to that of the D2. There's a few threads with pictures.

The aftermarket offerings are larger again.

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Originally Posted by bidds

I was also getting symptoms of broken exhaust studs: occasional screech (actually, only once); 'turbo' whistle. On removing the turbo, I found nothing broken and only a nut missing at the very back of the mainfold and some evidence (soot) of a small leak next to it. I've loosened all exhaust manifold nuts and they've come off nicely.

Does this indicate that perhaps it wasn't excessive heat that killed the turbo? Just a worn bearing?

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Indicates a warped exhaust manifold.

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Originally Posted by bidds

Which sensors are the ones that are most likely to influence this?

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Airflow and MAP.

Quote:

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Originally Posted by bidds

uestion:
Is there any value in putting a VNT into my truck (D2a) given I'm not going to mod the airbox, change the intercooler or remove the Mantec snorkel?

I'm in comms with BAS and td5inside and getting the impression that I might be best off just fixing or replacing the standard turbo.

I was planning to go with the S208-1 and a close-to or totally stock map. Jose' from td5inside is happy to do a map to suit.

Many thanks for facts, thoughts, opinions :)

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I would go for a GT2056 over a VNT. It's a straight bolt-on. Compounding the original GT2052 turbo would be better than all the rest.

How many miles was the turbo??

Garrett gives 80.000 kms of life expectancy :)

I have 2 td5´s @ home @ the moment! One of them broke the turbo with 100.000 kms the other one, had the turbo replaced @ 235.000 kms because the car seamed to be loosing a bit of power, but the turbo was not in total bad shape:)

There are alot of factors that can lead to turbo failure and the td5 has one that it´s a bit common...the pipe that feeds oil to the turbo is very near of the manifold so it gets a lot of heat. Sometimes there is restriction in that pipe, special on cold starts, so the turbo gets bad lubrification and gets worn a lot quicker.

Regarding turbo replacement, I am a big fan of the stock turbo. Good, reliable, an excellent compromise.

I´ve tunned a few turbo that were coupond to 2056 or more and did not like it. You loose a bit of down low power and get a bit in the higer revs, wich I dont think the td5 needs!

The S208 can also be a good option... I would take my option depending on price!

Regards,

That's good enough for me!

It's at about 135000km, so I guess it's done well in the scheme of things.

Would you recommend replacing or cleaning the oil lines to the turbo?

Thanks to all who've offered their thoughts, experience and opinions - much appreciated!

In the end I've decided to go with a new stock unit. My local LR guru says the part has been improved over the years and will give better performance than the original one. Combined with a mild td5inside map, I think I'll have a very good solution.

cheers,

bidds :)

Quote:

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Originally Posted by bidds

That's good enough for me!

It's at about 135000km, so I guess it's done well in the scheme of things.

Would you recommend replacing or cleaning the oil lines to the turbo?

Thanks to all who've offered their thoughts, experience and opinions - much appreciated!

In the end I've decided to go with a new stock unit. My local LR guru says the part has been improved over the years and will give better performance than the original one. Combined with a mild td5inside map, I think I'll have a very good solution.

cheers,

bidds :)

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Still no mention of an egt gauge!