Garrett GT28R on 300Tdi

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Originally Posted by Bush65

From your 1st post, it seems you have a faulty wastegate actuator.

Buying a TD5 turbo and another exhaust manifold to be able to put this turbo on a 300Tdi (if indeed it is possible to get a suitable manifold) is a troublesome and $$$$ way to fix the original problem for little or no advantage.

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Hi Bush65,

Yes, the waste gate actuator is faulty. I haven't pulled it off yet but I'm guessing the diaphragm has disintegrated or at least has a hole or a tear in it. I've disconnected it and blocked off the hose to stop the boost bleeding out there, and now just keep a very close eye on the boost gauge so as to not overboost. Correct me if I'm wrong but this eliminates that fault (?), temporarily of course.

The history is that I bought this vehicle as a restoration project and it already had the T25 exhaust manifold and GT28R on it. It was running/driveable but hardly making any boost. I thought at the time this was just because the hose to the waste gate actuator was resting on the exhaust manifold and had melted through, meaning that a lot of the boost was going out there, but as it turns out that was only the start. I'd be quite happy with the standard turbo, but it's a long way back now, and if I'm going to have to buy a turbo, I may as well get something a little better.

I have another question (for anyone) - what type of exhaust flange does the TD5's standard Garrett GT2052S turbo have? I'm finding some with what looks like a T25 flange and others with a 3-bolt flange (can't work out what that is called).


Thanks again,
James.

These pictures show it to be an odd 3 bolt flange. But one you could probably adapt to T25 with a plate.

http://www.landyspareparts.com/pub/f..._w450_h400.jpg

Redirect Notice

New GT2052 turbos come with a variety of housings, most with T25 pattern. They are reasonably cheap new (a lot of Toyota 3B owners in the US and Canada are running GT2052's I picked out), but significantly dearer than a used turbo will be.

How about one of these?

https://www.aulro.com/afvb/images/im...011/12/914.jpg

GT2052V 454135-0006/2/5/9/10/5009S/6S AUDI VW SKODA 2.5 V6 150hp turboCharger | eBay

(Apologies if already covered but I've not read through the whole thread...)

WRT the fuel pump, as long as you're keeping the max boost from the turbo the same as the original, the fuel pump settings could remain the same. However, if you are increasing the boost, something will need to be done to the spring under the rubber diaphragm to compensate.

M

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Originally Posted by slug_burner

How about one of these?

https://www.aulro.com/afvb/images/im...011/12/914.jpg

GT2052V 454135-0006/2/5/9/10/5009S/6S AUDI VW SKODA 2.5 V6 150hp turboCharger | eBay

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They are top-mount turbos that can't be clocked to bottom mount. If you can run it with the flange vertical it could probably be clocked to work with that orientation.

I had one for a short while, couldn't find a way to mount it.

I had a quick look on ebay after reading this thread and noticed a lot of these new turbo's are coming out of china, are these to be avoided or is someone actually doing some decent QC on them ?

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Originally Posted by loanrangie

I had a quick look on ebay after reading this thread and noticed a lot of these new turbo's are coming out of china, are these to be avoided or is someone actually doing some decent QC on them ?

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I was wondering the same thing. I'm not sure if I'd take the risk, even if they are around half the price. I'd love to know if anyone has one.


James.

Quote:

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Originally Posted by loanrangie

I had a quick look on ebay after reading this thread and noticed a lot of these new turbo's are coming out of china, are these to be avoided or is someone actually doing some decent QC on them ?

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I keep trying to get a chinese turbo. But every enquiry gets answered with "we haven't started producing that one yet".:(

I have no problems with chinese quality, they can beat everyone else when they want to. I'm running a chinese rebuild kit in my current T2560D.

I finally got a chance to drop into MTQ yesterday. They've recommended a Mitsubishi TD04-11G. It will have the T25 manifold flange but I will need to change the exhaust flange (no big deal I suppose), the oil drain fitting, and fit a 90 degree silicone bend to the compressor outlet. I did forget to ask about the spec of the wastegate actuator but will ensure it's around 15psi, preferably adjustable.

It seems a fairly easy option. Would anyone care to cast their opinion before I jump in? :cool:


James.

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Originally Posted by rainman

I finally got a chance to drop into MTQ yesterday. They've recommended a Mitsubishi TD04-11G. It will have the T25 manifold flange but I will need to change the exhaust flange (no big deal I suppose), the oil drain fitting, and fit a 90 degree silicone bend to the compressor outlet. I did forget to ask about the spec of the wastegate actuator but will ensure it's around 15psi, preferably adjustable.

It seems a fairly easy option. Would anyone care to cast their opinion before I jump in? :cool:


James.

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I would ask them for more detail (A/R numbers, etc).

The TD04-11G-4/5 were mainly fitted to 2.5L diesels, including the dreaded RR VM. At first glance it seems like it will be too small. Dougal can give you a definitive answer.

Bear in mind, most turbo shops will sell you setups that boost to ~9 psi, because that is what they think the nissotas can handle when bolted to factory NA engines. They don't know that the 4BD1 is a million x stronger and was factory boosted to ~17 psi. They also probably recommend a specific turbo because they get a good price on it.

EDIT - I have no idea where this document originated from, but it lists a TD04-15G fitted to a 4BD1T, which sounds like a much better size.
http://www.stealth316.com/misc/mhi-t...ons-melett.pdf