300ZX (Z32) Forums Dedicated to 90-96 ZCars otherwize known as the Z32's

Help. Im new to Twin turbos. blue smoke

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Old 07-16-2008 | 02:47 PM
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myfairlady's Avatar
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Help. Im new to Twin turbos. blue smoke

Ok my friends mechanic says its not the head gasket but the turbo oil preasure lines that is causing the blue smoke. IS this true? Blue smoke is coming out of my exhaust. I need help. Please please please please please!!!
Old 07-16-2008 | 03:42 PM
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It cannot be a turbo oil line that is causing burning oil in the exhaust (the oil lines feed the center section, which is supposed to be sealed off from the turbine). One of the turbos is shot. (The center section is leaking oil into the turbine, where it is burning off and exiting through the exhaust.)
Old 07-16-2008 | 06:18 PM
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myfairlady's Avatar
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wow so i have to replace one of them... Well hopefully i can fix it. I know there is not alot ofroom to do that
Old 07-16-2008 | 06:46 PM
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A compression test will determine if it's a head gasket or a turbo. Besides the blue smoke, if it seems to run fine, it's probably a turbo.
Old 07-16-2008 | 08:36 PM
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Easiest way to replace turbos is to remove the engine. And 2nd what CanyonCarver said... do a compression test to make sure it's a turbo and not the head gasket (though I fully believe it to be a turbo).
Old 07-16-2008 | 09:23 PM
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Yeah your right. Wow. DO i have to drop the engien to replace the turbos? That kinda sucks if I had to.
Old 07-16-2008 | 10:04 PM
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The turbos can be replaced with the engine in the car, but I am ABSOLUTELY SERIOUS that it is easier to just remove the engine.

http://www.ttzd.com/tech/turbotech.html
Step 1: Remove the engine
http://www.ttzd.com/tech/enginetech.html

If there were an easier way, the writeup would've detailed how to do it.

My advice though, do not remove the alternator or power steering pump from the engine. Leave those connected and pull the engine with them on the motor (just disconnect them). The AC compressor should be removed and left in the chassis though (without disconnecting the lines), so you don't lose your AC charge.
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