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Replacing Stock Manifold without removing turbo. Possible?

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Old Dec 10, 2007 | 06:24 AM
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Replacing Stock Manifold without removing turbo. Possible?

All,

I do not know if somebody has done it but I would like to know if it can be done.

Can the stock manifold be removed without removing the turbo?

I would say that it can be done but just want to check if somebody else has done it.

I know..... I know.... A lot of people will say: "Do it the right way!" or "Do not be lazy", etc I just want to check if it can be done.

Lets face it..... It will cut the time from hour(s) to minutes for the experienced ones. Also, the amount of tools needed.

I know that a few months back, I replaced my Civic Header in 35 minutes and I had to disconnect the Catback. :-)
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Old Dec 10, 2007 | 06:50 AM
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Yeah, sure!! I do it all the time.
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Old Dec 10, 2007 | 06:52 AM
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i can't imagine the right way being taking the turbo off to get the manifold off... that would be a ton of work for such a simple job.

the manifold can come off easily without taking the turbo off. aside from the nuts holding the manifold to the head, and the fasteners holding the manifold to the turbo, the only other thing you need to do is disconnect the downpipe from the o2 housing, and if you have a stock o2 housing, take the bolt out of the bracket holding the 02 housing to the block (right beside where the downpipe bolts are)
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Old Dec 10, 2007 | 06:56 AM
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IMHO to remove the turbo you must unbolt the downpipe and then pull off the exhaust manifold so......just do that!
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Old Dec 10, 2007 | 07:25 AM
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So, if you remove the manifold and leave the turbo hanging there, is the turbo´s weight supported by the oil and coolant hard lines exclusively?
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Old Dec 10, 2007 | 07:27 AM
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Originally Posted by sparky
So, if you remove the manifold and leave the turbo hanging there, is the turbo´s weight supported by the oil and coolant hard lines exclusively?
The lines and the downpipe. You can put a jsck under the downpipe to hold the turbo in place though.
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Old Dec 10, 2007 | 07:31 AM
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Originally Posted by sparky
So, if you remove the manifold and leave the turbo hanging there, is the turbo´s weight supported by the oil and coolant hard lines exclusively?
Yes, and they will support it just fine, they're not that heavy and the lines are plenty beefy!
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Old Dec 10, 2007 | 07:38 AM
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Thanks! If it is supported by the DP it would be good. However, I am a bit confused as post #3 talks about the need to disconnect the DP from the O2 hsg.
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Old Dec 10, 2007 | 07:42 AM
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yes, you need to remove the DP as well. To remove the manifold you need to push down and out on the turbo (flexing the lines a little) in order to get the manifold off over the two studs coming out of the turbine housing. If there were no studs and just bolts, this would not be an issue. You cannot push the turbo down far enough to clear these studs with the downpipe attached, or if you can you have a loose downpipe/exhaust mounts!
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Old Dec 10, 2007 | 08:33 AM
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you dont have to necessarily unbolt the dp. ive taken my mani off several times w/o even jackin the car up. just be careful if you do it this way to not damage the threads on the studs in the turbine housing.
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Old Dec 10, 2007 | 08:43 AM
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^that is correct^ I have done it a few times on my IX. Just used a pry bar to pull the turbo away from the block a little bit to release the tension on the bolts and slid it off. I will say to be careful with the threads on the turbo to Manifold Studs...they can seize and strip very easily.

Eric
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Old Dec 10, 2007 | 10:15 AM
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I have an aftermarket O2 so no bolt there. I think that I can play with the DP hangers disconnected. The DP should give me enough clearance to remove the head portion first.... then pull up the manifold.

The turbo will be supported by the DP and the handling bars underneath the car. Any thoughts?

Originally Posted by sparky
So, if you remove the manifold and leave the turbo hanging there, is the turbo´s weight supported by the oil and coolant hard lines exclusively?
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Old Dec 10, 2007 | 10:16 AM
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Thats how I have done it in the past.

The hardest part is pulling the manifold away from the head enough to get around the studs. That is where a small pry bar comes into play

Eric
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Old Dec 10, 2007 | 10:18 AM
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So... definitelly can be done without taking the turbo out with the manifold!

For the guys that have done it..... Do you disconnect the turbo oil line that goes to the head?

Since that one is rigid, I am concern that it may break while moving the turbo away from the head!
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Old Dec 10, 2007 | 10:21 AM
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for sure! that is a big no no to leave that hooked up. Its been a while but I think I disconnected the return line as well just in case I was stressing it too much. Again its been a while so im going off of memory

Eric
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