GT2871 impeller nut gone! - Page 3 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 06-21-2009, 10:56 PM   #41
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I think I am going with the no-stuff approach for the oil supply line. That is, no tape at all
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Old 06-22-2009, 10:46 AM   #42
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I'm tellin you, the tapered pipe threads will probably still leak. get some goo on there that wont junk up your bearings.
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Old 06-22-2009, 10:53 AM   #43
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My BEGI oil supply never leaked and has no tape or thread sealer. Maybe a washer or something.
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Old 06-22-2009, 11:12 AM   #44
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No I meant no tape. I will still use a sealant, probably permatex.
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Old 06-22-2009, 11:29 AM   #45
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oh well then carry on
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Old 06-22-2009, 03:28 PM   #46
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I have already started to remove all tape, and clean out all of the fittings. The block fitting is next, a PIA to get to with the engine in the car. I am not looking forward to removing/reinstalling that one.
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Old 07-27-2009, 09:27 PM   #47
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Quote:
Originally Posted by ZX-Tex View Post
I really thought I was being careful with the tape, but clearly a piece or two got in there somehow. Needless to say all of the feed lines and fittings will be removed, checked, and well flushed before the new turbo goes in.
I was looking at your photo. Most self locking nuts must have thread protrusion to work properly. When I look at your photo it looks as if there isnt any. If that is true then it wasn't assembled correctly. Ask some questions about it and see what you are told about it.
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Old 09-30-2009, 12:10 AM   #48
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On the advice of an engineer who has put World Challenge GT cars into victory lane this season, I got a tube of Permatex High Temperature Thread Sealant, the white liquid stuff.
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Old 09-30-2009, 01:28 AM   #49
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you put the sealant after you tighten it up or spread it on the threads before you bolt it on?

Is this the same stuff you use for the drill hole in the oil pan?

Tex, perhaps the turbo locked up and thats when the nut flew off due to the 100k rpm > 0?
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Old 09-30-2009, 04:12 AM   #50
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It is what I will be using on my oil return in the pan. Spread it on before assembly.
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Old 10-09-2009, 10:28 PM   #51
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I also agree with DOHCPanther! i dont know for sure but i have taken many turbos apart and rebuilt a few and they all had threads sticking out above the nut.... I have a feeling someone along the way forgot to tighten the nut. Garrett is probably using the teflon as an excuse to get $600. Check it out i find it unreasonable that the teflon would suddenly cause an oil restriction
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Old 10-09-2009, 11:59 PM   #52
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which permatex would you recommend? theres couple different types that seem like they might work. Which one should i buy?
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Old 10-10-2009, 05:11 AM   #53
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Resbond will do also, i.e. for the oil return fitting.
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