12HT Turbo Removal

[AussieHJ6X]

Hi all,

I’m in the process of taking the stock turbo off my 60 series so I can diagnose/fix an oil leak and I’ve hit a bit of a snag.

Step 9 of the FSM says to "loosen the union nut", two nuts, and two bolts in order to remove the water by-pass pipe.

I've loosened what I think is the union nut as far back as it will go, as well as the other fasteners, but the block end of the by-pass pipe doesn't want to budge. I don't want to apply too much force in case I damage a NLA part.

Have I undone the right thing here and just need to give it a tug, or do I also need to remove the larger union that screws into the block?

Second question: FSM says to remove the turbocharger along with the turbine outlet elbow/downpipe. If it's easier to access the nuts that attach the downpipe to the turbo, can I leave the downpipe connected to the rest of the exhaust, or will that make it difficult to maneuver the turbo off the exhaust manifold?

 

[mudgudgeon]

2nd question - you have studs opposing each other at 90⁰. It will be hard to get the turbo free off the manifold and downpipe because of this

 

[AussieHJ6X]

2nd question - you have studs opposing each other at 90⁰. It will be hard to get the turbo free off the manifold and downpipe because of this

That’s the factory configuration, which I assume is why the FSM says to remove the turbo and the downpipe together and then seperate them out of the engine bay.

I wanted to know from people who have done 12HT turbo work before whether there was an alternative way to what the FSM suggests

 

[cuteo100]

The studs are in the way. I swapped mine for bolts to make future maintenance easier.

 

[mudgudgeon]

That’s the factory configuration, which I assume is why the FSM says to remove the turbo and the downpipe together and then seperate them out of the engine bay.

I wanted to know from people who have done 12HT turbo work before whether there was an alternative way to what the FSM suggests

Follow the fsm. I have removed turbos several times on hdj80. Same turbo, different engine. The studs will prevent you separating the turbo without moving the exhaust out of the way.
Either unbolt the downpipe or undo exhaust mounts so you can move the exhaust enough to get it clear of the turbo.

Some times is easier and faster to take a few seemingly unnecessary steps

 

[AussieHJ6X]

Thanks for the feedback, everyone. I’ll struggle with those rusty exhaust studs!