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Old Jul 16, 2016 | 08:31 AM
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I have a 98 a4. the engine has a main bearing noise. I`m going to swap it for a 04 zo6 motor. what will I need to do the swap? Is it pretty straight forward?
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Old Jul 18, 2016 | 07:55 PM
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The only thing you'll need is a tune. All the sensors and covers are the same.

Be sure to pull the pilot bearing out of the crank prior to mating the engine to the torque tube.
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Old Jul 19, 2016 | 02:25 PM
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The 98 fuel rails will need to be reused as well as your OEM injectors.

If you get your PCM tuned for a ZO6 spec engine, you can swap in the newer injectors.

BC
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Old Jul 19, 2016 | 05:10 PM
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by using the 98 fuel rails does that take care of the fuel return line problem
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Old Jul 19, 2016 | 06:06 PM
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Originally Posted by painterman98
by using the 98 fuel rails does that take care of the fuel return line problem
The 97 & 98 C5 have the return line and external regulator. 99-04 does not. They only have one line.

BC
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