ITT we discuss why my brand new 2871R seized - Miata Turbo Forum - Boost cars, acquire cats.

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Old 08-17-2009, 02:37 AM   #1
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Default ITT we discuss why my brand new 2871R seized



20ish autocross runs, about 15 laps at Calspeed (one full session, 3 partial sessions). It started making a little bit of noise for about a lap, and then it stopped making boost completely. I thought I had popped a pipe, but then I heard it squeak a couple of times.

Back to Garrett tomorrow. I have an event in 2 weeks.
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Old 08-17-2009, 02:42 AM   #2
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WTF?! That stinks.
First thing that comes to minder is the funky oil drain, but other than that...?
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Old 08-17-2009, 02:43 AM   #3
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Holy **** man


Turbo miata's everywhere tremble at the mere mention of the name "Savington"
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Old 08-17-2009, 02:47 AM   #4
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Originally Posted by Spookyfish View Post
WTF?! That stinks.
First thing that comes to minder is the funky oil drain, but other than that...?
If anything, that would cause an oil seal to go. Turbo is dry on the compressor side. Haven't seen the turbine side yet (I am going to hurl if the housing is fucked up).
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Old 08-17-2009, 03:58 AM   #5
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I know, that's why I doubt it's that. Very curious: get that turbo off, it's only three bolts this time Ok, and some oil/water lines.
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Old 08-17-2009, 04:17 AM   #6
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Bah. Don't know whether I didn't get them tight enough when I clocked it or whether they backed out on their own, but 5 of the 6 bolts that hold the turbine housing to the CHRA backed out. Turbine cocked to one side, made noise for a while, then finally seized the shaft. The turbo spins free, just like it should, but the housing and turbine wheel are done.

May do Resbond, may do safety wire.
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Old 08-17-2009, 04:24 AM   #7
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Originally Posted by Savington View Post
Bah. Don't know whether I didn't get them tight enough when I clocked it or whether they backed out on their own, but 5 of the 6 bolts that hold the turbine housing to the CHRA backed out.
Wow, mine were tight as hell to get off. Maybe you put it on hand tight and forgot about them later on? I doubt that that is going to be our next failure point.
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Old 08-17-2009, 04:25 AM   #8
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Nope, I remember cranking down all 12 at the same time. I clocked the CHRA to fit the drain line, snugged a couple, pulled it back out and cranked them all. :(
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Old 08-17-2009, 04:33 AM   #9
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****, better get a root cause analysis on this.
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Old 08-17-2009, 09:27 AM   #10
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Didn't JayL's brand new Garrett destroy itself as well?
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Old 08-17-2009, 09:30 AM   #11
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Sucks Sav, and just when we thought you were done having to mess around with the turbo!
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Old 08-17-2009, 09:34 AM   #12
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Quote:
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Didn't JayL's brand new Garrett destroy itself as well?
He used teflon where he shouldn't have?
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Old 08-17-2009, 09:46 AM   #13
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i still don't see how that made a compressor nut pop off....
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Old 08-17-2009, 09:56 AM   #14
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Thought that was ZXTex...
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Old 08-17-2009, 09:59 AM   #15
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that's gay as ****. Time for me to bust out the safety wire on mine.
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Old 08-17-2009, 10:13 AM   #16
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They aren't supposed to be horribly tight, 30ftLb's IIRC with blue loctite optional.
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Old 08-17-2009, 10:41 AM   #17
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Quote:
Originally Posted by thymer View Post
They aren't supposed to be horribly tight, 30ftLb's IIRC with blue loctite optional.
Is this a poor attempt at humor? Please clarify so I can belittle you on the internet. I'd hate to mistakenly harass anyone.
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Old 08-17-2009, 10:52 AM   #18
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Quote:
Originally Posted by hustler View Post
Is this a poor attempt at humor? Please clarify so I can belittle you on the internet. I'd hate to mistakenly harass anyone.
When I was clocking my 3071 I couldn't find a torque spec so I email Garrett tech support. I was surprised at the low value but maybe it's just for the compressor side as it is aluminum. I can't find the email now so maybe my memory is failing but it was low.
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Old 08-17-2009, 10:56 AM   #19
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Quote:
Originally Posted by thymer View Post
When I was clocking my 3071 I couldn't find a torque spec so I email Garrett tech support. I was surprised at the low value but maybe it's just for the compressor side as it is aluminum. I can't find the email now so maybe my memory is failing but it was low.
so...what about the blue loctite? Does that work?

btw, 30lb/t is a ****-ton for that little bolt.
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Old 08-17-2009, 11:25 AM   #20
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That really sucks! Sorry to hear....
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