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Discussion Starter #1
I plan to pull my turbo out to do a King Cobra install.
  • How much oil will drip out when I pull the lines? I'm thinking it's just a cup or so. More?
  • Do I need to fill it with oil after install? Or can I just pull fuse #32, spins the engine a bit, and roll from there?
 

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1. Probably none - oil should drain from the top of the motor through the CHRA and into the pan within an hour or two. You'll lose drops.
2. YES. Always prime new turbos with oil - 4oz is a good number to just pour or squirt through the oil feed. It's not a bad idea to disconnect the crank sensor and turn it over til oil pressure comes up before starting as well.
 

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I was never able to get much oil in the two turbos that I installed after rebuilding. They must not hold much, and there have been some residual oil still in them. I used the pull the fuse and crank the engine method, and both turbos are still running strong quite a few years later.
 

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Yeah, they hold essentially no oil. The point is only to be sure the bearing has good trace lube. Most of what goes in comes out.
 

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That would explain it! I had one turbo rebalanced by a turbo specialist at a local marine engine shop. He slathered everything with some sort or red assembly lube, and said that he's never had a problem with them. I still cranked the engine over without the fuse in, just to make sure some oil was in there.
 

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I've often wondered about using assembly lube, but every turbo manufacturer says inject oil, so I feel like there may be something there. It could just be assembly lube won't hold up in storage, so oil is the only functional choice for "off the shelf" turbos.
 

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I've often wondered about using assembly lube, but every turbo manufacturer says inject oil, so I feel like there may be something there. It could just be assembly lube won't hold up in storage, so oil is the only functional choice for "off the shelf" turbos.
It's actually the opposite. Assembly lube does pretty well in short- to medium-term storage...but oil does much better at getting places quickly. When I build BMW motorcycle engines, I use assembly lube in fewer places if the engine is going to be started immediately...more if it is going to sit for awhile.
 

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That's what I mean ... if you're going to build a turbo and then wait a day or a week or a month you'll be fine with assembly lube. But if you want to store it for a year or two it won't be particularly effective... assembly lube is only useful for 2-3 months max. So manufacturers don't use assembly lube, instead they rely on a point-of-install oil injection.
 

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Discussion Starter #10
By "oil injection" you mean just suck some up in a syringe and fill up the hole where the upper oil line attaches?
 

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Yeah I've rebuilt both my turbos unfortunately on the first one I didn't drain out the coolant when I found out the hard way that every bit of coolant just about came out the line that I disconnected from the turbo. So the second time I made sure she was dry before I pulled the turbo. As far as oil though javanbra has it down.just a little from the line no pan needed. When I rebuilt the turbos I just made sure to use some oil and oil up all the bearings as they went in. Then just put the turbo back in. Filled up the coolant. And let her rip. Haven't had any problems with either. I'm dying to figure out how to do a stage 1 tune on this car and my next step after that was look for a bigger turbo so let me know how it goes Bob good luck brother she should be a whole lot of fun with that new Turbo.
 
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