Early Turbo?

geordi · **Posted:** Wed Feb 27, 2019 5:40 pm

Interesting. That is a late year build then, certainly not a development model. I wonder if somehow the previous owner bought a replacement turbo and got that one, and then had to get a new manifold that matched.

krb · **Posted:** Thu Feb 28, 2019 5:33 am

Yea, hard to figure, but I guess that makes the most sense. Maybe the old 3 bolt and manifold was cheaper than getting a 4 bolt replacement.

diesel_guy86 · **Posted:** Thu Feb 28, 2019 8:34 am

krb wrote:

Yea, hard to figure, but I guess that makes the most sense. Maybe the old 3 bolt and manifold was cheaper than getting a 4 bolt replacement.

There is no “old 3 bolt”, everything was 4 bolt BEFORE the US version in 05-06. My thoughts are its either GDE’s turbo kit, or its the manifold/turbo from the A428, which was the next generation engine after ours. I *think* that was a 3 bolt flange.

Mountainman · **Posted:** Thu Feb 28, 2019 12:56 pm

diesel_guy86 wrote:

krb wrote:

Yea, hard to figure, but I guess that makes the most sense. Maybe the old 3 bolt and manifold was cheaper than getting a 4 bolt replacement.

There is no “old 3 bolt”, everything was 4 bolt BEFORE the US version in 05-06. My thoughts are its either GDE’s turbo kit, or its the manifold/turbo from the A428, which was the next generation engine after ours. I *think* that was a 3 bolt flange.

I wonder if the control (software) is any different. Make sure you save a copy if you ever mess with it if there's any doubt, as I've seen plenty of software mods in end-run of production to accommodate such odd parts use.

geordi · **Posted:** Fri Mar 01, 2019 2:33 am

This wasn't an end-of-production run though. This was just the end of 2005 production, they still had all the 2006 to build.

This has to be aftermarket, Euro, or maybe the industrial version manifold and turbo. There's no reason to have 4 bolts on something that isn't moving a lot, but there's also no reason to go to 3 bolts as an "upgrade" on a car that drives around in unknown conditions. It is a 25% weaker design.

krb · **Posted:** Fri Mar 01, 2019 6:50 am

This is very interesting stuff. I'm new to these (although not to diesels).

Now I am really curious, as the 3 bolt mount seems to be a step "backwards" unless it was a turbo upgrade or a cheaper fix for a replacement.

Anything else I can check for clues?

Thanks guys,

diesel_guy86 · **Posted:** Fri Mar 01, 2019 8:59 am

Could you email me some pics? Ill shoot my email to ya via pm.

Mountainman · **Posted:** Fri Mar 01, 2019 11:26 am

diesel_guy86 wrote:

Could you email me some pics? Ill shoot my email to ya via pm.

Just in case anyone missed it, I posted the part number off of it earlier in this thread.

krb · **Posted:** Sun Mar 03, 2019 6:29 am

diesel_guy86 wrote:

Could you email me some pics? Ill shoot my email to ya via pm.

I can, and you'd be welcome to post them too.

krb · **Posted:** Sun Mar 03, 2019 12:30 pm

The river has gone back down so I can drive out to the machine shop tomorrow with my head.

I checked the turbo gasket I got with my head gasket kit from IDParts and it fits, it has the arrangement for a 4 or 3 holer.

krb · **Posted:** Mon Dec 23, 2019 2:57 pm

ARRGGG!

I hadn't really inspected the exhaust manifold that closely - until it was time to put this all back together. Looks like a tap is broken off in one of the 3 stud holes! Bugger! :furious:

What are my options for an exhaust manifold? Junk yard? I don't see that IDParts or Saquatch lists one. :banghead:

And can I go ahead and install the rockers & intake etc while waiting on this? The FSM says head, then turbo, then rockers, then intake, then...

Man, I was hoping to get this back together over the holiday break...

thesameguy · **Joined:** Sat Oct 01, 2016 8:24 pm **Posts:** 652

Just to be clear, one of the three studs is broken?

Take it to a machine shop, they'll get it out. They usually charge $20 or $40, much cheaper than a replacement.

Also, 99% sure my turbo only has three bolts. I remarked on it when I removed it. It's an '05, not sure of the production date offhand.

krb · **Posted:** Tue Dec 24, 2019 6:53 am

Yea, out of the 3 studs, one of the holes has a tap broken off in it, not the stud. It was attached by 2 studs & nuts. I was so focused on figuring out why I had a 3-hole turbo I neglected to inspect the exhaust manifold. Ba humbug!!!

I'll check with my friend at the machine shop if he can remove or drill out a tap. I guess while he has it he could make a plug for the EGR port too.

So your turbo is a 3-hole too, not 4? Interesting...

thesameguy · **Joined:** Sat Oct 01, 2016 8:24 pm **Posts:** 652

Yep, just 3. The gasket is clearly designed to accommodate 3 or 4 studs, so it can't be that unusual.

(new studs and nuts

)

krb · **Posted:** Fri Dec 27, 2019 7:35 am

Interesting. The new gaskets are the same way.

My buddy with the machine shop was able to tickle out the broken tap so I'm back in the saddle. New studs should arrive today.

Progress...

thesameguy · **Joined:** Sat Oct 01, 2016 8:24 pm **Posts:** 652

krb wrote:

Interesting. The new gaskets are the same way.

Aye, got one of those in a few weeks ago. Exactly the same.

This thread made me go look for replacement turbos, and it sure seems like nobody distinguishes between 3-bolt and 4-bolt turbos. Makes me worry that if I ever needed a turbo, I might also need a 4-bolt manifold. That doesn't make me feel great.

krb · **Posted:** Fri Dec 27, 2019 6:56 pm

All the ones I’ve found were 4 bolt. Looking at the manifold, I think it could be drilled and taped for 4 holes. Two of the originals are blind and one is open.

Early Turbo?

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