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Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Just when I thought the dashboard R&R I just did would hold the crown indefinately, I have a new winner.

ALL FOUR of my turbo mounting bolts were gone. I am 99% sure I tightened them during turbo install, but apparently not enough. I also should have used new hardware, I suppose.

So anyway, getting those four bastards in without disturbing any of the other turbo crap was AWESOME FUN, totally recommended! Replaced them with some 10.9 fasteners and new spring washers and got them nut bustingly tight with a couple of different wrenches.

So. . .check the torque on these things if you think of it. It was making a low grumbling and disconcerting rattle at around 3k. Glad it didn't turn out to be teh turbo, but I do hope my exhaust mani is OK. . .

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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

skytrooper · Joined: 29 Aug 2007 Posts: 461 Location: Canandaigua, NY

Good timing on this topic RM. I am putting my turbo in this weekend.

Sorry you had so much fun LOL
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Matt

1987 - 924S "Black Pearl"
1982 - BMW 633CSi
1984 - BMW 528e
1983 - 944 N/A "Blue Max" (Gone)
1981 - 931 "Scarlet Harlot" (Gone)
1976 911S Targa (Gone)

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Repeat as necessary: new hardware, piss-tight.

Deep offset box-end wrench worked very well on the uppers.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

Min · Posted: Fri Mar 14, 2008 7:25 am Post subject:

Ok, so let me get this straight.... you installed spring washers on turbo mounting bolts?.... do these bolts happen to get really hot? ....

Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting.

Paul · Posted: Fri Mar 14, 2008 10:05 am Post subject:

I tighten everything I can reach during EVERY oil change.
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

924RACR · Posted: Fri Mar 14, 2008 11:55 pm Post subject:

Funny, this was about what I had pictured as the worst job before I opened the thread. When I got my first 931, the turbo wasn't completely bolted in properly - leaked oil everywhere and was loose and leaking (boost and exhaust too)! Eventually had to R+R completely.

I spent a long time, and many repeated attempts over the years, to find a system that would keep that bugger in place.

Final solution seems to be use copper locknuts where possible (mainly just the downpipe flange), and safety-wire all the rest of the bolts.
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

Min · Posted: Sat Mar 15, 2008 1:32 am Post subject:

I'd personally go with stainless steel locknuts on the high heat bits, and serrated stainless steel washers instead of spring washers. As outlined in the exhaust section of maximum boost. Apparently copper locknuts tend to go soft and saggy after awhile in turbocharger heat conditions

Min
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Custom means it didn't come from a box.
1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting.

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Yeah, when I initially did the R&R I used all new hardware from Porsche, and neither the exhaust components nor oiling system have leaked a drop. . .
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

KlaasyT · Joined: 20 Jul 2006 Posts: 25 Location: Ontario Canada

While chasing an oil leak I found mine had come loose where the mounting bracket joins the turbo body. The bracket was still tight to the block. Those socket heads were tricky to get at without pulling the charge tube but I got them. Hopefully the o-ring between them didn't move! First issue since I installed the turbo a year and a half ago.
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81 931 Minerva Blue
72 911t Irish green
84 911 Carrera Targa sold
72 911t rs look project
71 911e rusty future project