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Rb25 Turbo Exhaust Housing Removal

Leeroy94

By Leeroy94,
in Engines & Forced Induction

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Leeroy94 Enthusiast

Leeroy94

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How do you remove the exhaust housing of an rb25 turbo?

There's 6 bolts, 3 of which came out. The other 3 can't fully unbolt because the oil line screw holes are in the way.

Ive soaked it in wd40 because apparently your suppose to twist it?

What what does it twist, where do I hit it with a mallet?

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https://www.sau.com.au/forums/topic/438400-rb25-turbo-exhaust-housing-removal/
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boostn0199 Grand Master

boostn0199

Posted
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you just undo the 3 as much as u can then start hitting it with a hammer and soaking it in wd40 you need to break the seal first its just welded it self from not being removed for so long eventually you will break it loose then you can twist i. Just hit it all around the housing youll need a proper hammer its steel anyway so wont break only need the rubber one on the comp housing.

89CAL Grand Master

89CAL

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Posted

Id still use a softer hammer on cast iron, you shouldnt need a hard hammer

The reason its smart to twist it to break the seal is so you dont hit one side of the housing and have that side snap loose and then snap the exhaust wheel off. I know people who have done this, It needs to come off straight or you'll need a new turbo anyway

Leeroy94 Enthusiast

Leeroy94

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Posted (edited)

I took it down to the turbo specialist. He said rb25 turbos are sealed inside (ball bearing) and therefore there is no point in taking it off to clean.

I ended up getting a tooth brush and getting the excess soot out of the exhaust housing, apparently the only area that needs to be sut free is around the actuator flap.

Edit: there was about 2mm thick soot everywhere, hence why I tried to take it apart to clean.

Edited by Leeroy94
89CAL Grand Master

89CAL

Posted
Posted

Well I think if you could easily have got the housing off it would make it much easier to clean. You would have to been able to clean the whole exducer, all of the internals of the exhaust housing and anything else that you might want to at the time

But cleaning it while it being together saves possible damage to the exhaust wheel

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Leeroy94 Enthusiast

Leeroy94

Posted
  • Author
Posted

Well I think if you could easily have got the housing off it would make it much easier to clean. You would have to been able to clean the whole exducer, all of the internals of the exhaust housing and anything else that you might want to at the time

But cleaning it while it being together saves possible damage to the exhaust wheel

Yeah I think it may have slightly ceased up. I soaked it overnight but no luck.

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