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Me like track days
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,209
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Let's just say ya have a broken head stud.......
What is the typical labor cost associated with replacing a head stud?
Cost of labor for replacing one cylinder? Fire way.....
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ - "930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe Movie: 930 on the dyno |
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03-15-2006, 05:16 PM
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Stranger on the Internet
Join Date: Apr 2004
Location: Bradenton, FL
Posts: 3,244
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Home equity rates are still reasonable...
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Patrick E. Keefe 78 SC |
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03-15-2006, 05:19 PM
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Porsche Junky
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Gold coins are not gonna increase as an investment...you might as well cash them in now...you're gonna need the cash....
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1986 930 RUF equipped |
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03-15-2006, 05:27 PM
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do you have to? I hear one is ok...two you might have a problem....do a compression check when you break two. cuz, if your gonna tear into one cylinder, you might be needing a clutch and many other things while the engine is out....save your money, until you have have to. who knows...she may run for years.
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03-15-2006, 05:41 PM
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Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,541
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I am very sure we have never discussed this before.
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Porsche 2005 GT3, 2006 997S with bore-scoring Exotic: Ferrari F360F1 TDF, Ferrari 328 GTS Disposable Car: BMW 530xiT, 2008 Mini Cooper S Two-wheel art: Ducati 907IE, Ducati 851 |
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03-15-2006, 05:41 PM
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
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I told ya not to mess with that BOV!!!
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP  )
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03-15-2006, 05:52 PM
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Registered
Join Date: Mar 2004
Location: US
Posts: 1,621
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I think it is imperitive for Craig to repair his headstud and not drive w/ a broken one, due to the high state of tune his turbo motor is in. It is putting a lot more stress on the head studs than a normal 3.0, which is the most common motor to break or be driven w/ broken headstuds.
Craig, I'm not sure how much DIY stuff you do, but headstuds aren't that hard to replace. Otherwise, I'm sure someone will chime in on price, but you must be looking at at least $800 for motor/trans R&R, and for your turbo probably around another 8 hours of work (guessimate) to tear down the motor and replace the stud. Your turbo has a lot of connections and a lot of stuff to disconnect to get down to the longblock. |
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03-15-2006, 06:08 PM
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Me like track days
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,209
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Well I'm jumping the gun a bit here with the prognosis, but the 930 is down on power..........57 HP. 418 vs. 361 "Wah", right?
--------------------------------------------- Here are the particulars. What we have here is an overlay of 'before' and 'after':  Top line vs. bottom line. Same temp Same gas Same timing Virtually the same fuel mixture BOV works fine Headers seal fine Factory boost tester shows exactly .8 bar - as before Turbo seals and shaft tolerances are fine Consistent power 'loss' across the board
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ - "930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe Movie: 930 on the dyno Last edited by Craig 930 RS; 03-15-2006 at 06:51 PM.. |
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03-15-2006, 06:48 PM
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Registered
Join Date: Apr 2005
Location: outta here
Posts: 53,853
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I'd suggest a leakdown test.
JR
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"Masculine republics give way to feminine democracies, and feminine democracies give way to tyranny." *** Aristotle |
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03-15-2006, 07:13 PM
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Me like track days
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,209
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Monday = leakdown
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ - "930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe Movie: 930 on the dyno |
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03-15-2006, 07:25 PM
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I've recently been down this road. 3000 for all replaced with 993 studs along with some other work like exhaust studs, gaskets, etc. Prices will probably be a bit more on your car, but then there is the "while you're in there" philisophy that will push it over 5-7k.
I had also been told by engine builders of good rep that a NA car may be ok with a broken stud for quite a long time, but a blown one will lift the heads and cause expensive damage.
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...sick with gearheadia |
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03-15-2006, 08:47 PM
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Join Date: Aug 2002
Location: Galivants Ferry, SC
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Maybe check the basics first.... I see the HP shown on the graph to be "SAE"...but ask the shop how it's captured...as "SAE-corrected" or what ???
Otherwise....day-to-day atmospheric and weather differences can show big, recorded HP changes... - Wil ( wishful you don't have a head stud problem)
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Wil Ferch 85 Carrera ( gone, but not forgotten ) Last edited by Wil Ferch; 03-16-2006 at 09:45 AM.. |
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03-16-2006, 08:31 AM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,494
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nobody should replace just one stud. 6 months down the road what if another one goes?
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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03-16-2006, 08:35 AM
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Me like track days
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,209
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Background:
Engine built as a 3.4 in mid-2004 Same dyno, same conditions, same owner/operator I don't know if it is a head stud, just a really good gue$$ at this point. We'll see on Monday. Until then what else might it be - taking into account the items we've already checked?
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ - "930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe Movie: 930 on the dyno |
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03-16-2006, 08:42 AM
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JOT MON ABBR OTH
Join Date: Feb 2001
Location: USA
Posts: 3,238
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Follow Big John's advice!!! Replace them all, have it done right, have it done by one of the reputable shops! Oh, and while your in there...
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David '83 SC Targa (sold ) MANLY babyblue honda '00 F250 7.3L (MINE!)'15 F250 Gas (Her Baby) '95 993 (sold )I don't take scalps. I'm civilized like white man now, I shoot man in back. |
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03-16-2006, 09:00 AM
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Me like track days
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,209
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Yep.......that's the plan. Probably a clutch too -
That is, if the leakdown shows a problem at all
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ - "930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe Movie: 930 on the dyno |
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03-16-2006, 09:17 AM
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
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Have you bothered to pull the covers and check for headstud "loosness" and/or barrel nuts that have fallen off? Can you see any sludge between the cylinders and the heads? Also, if the engine was rebuilt in 2004 to be a 3.4L, I'd hope the OEM Dilavars were replaced!
I'm with Wil, let's hope it's something related to the Dyno or wheather!
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP )
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03-16-2006, 09:34 AM
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
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One other thing to check are the fuel injector intake blocks that fit under the intake manifold. They're made from some phenolic (spelling?) material and are VERY prone to cracking!!! In fact all six of mine were cracked. When I decided to pull my turbo engine to "go nutz" with, it sounded like an early Beetle or Harley engine. Like a VERY serious exhaust leak, although my header had no cracks. I thought I had broken a headstud for sure. As I began dissassembly, all the studs were perfect! I think I either had a bad injector (causing a cylinder not to get fuel), or was suffering from a serious intake leak. Ignition was fine. My engine had oil leaks galore, so the rebuild was needed from my perspective! Then the "while you're in there" spiral started...long story short, when or if I decide to sell this car, someone will wind up with a VERY WELL sorted 930!
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP )
Last edited by sand_man; 03-16-2006 at 10:28 AM.. |
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03-16-2006, 09:44 AM
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resident samsquamch
Join Date: Oct 2005
Location: Cooterville, Cackalacky
Posts: 6,815
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By the way, how does the car drive? How does it sound?
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-jeff back in the saddle: '95 993 - just another black C2 *SOLD*: '87 930 GP White - heroin would have been a cheaper addiction... "Ladies and Gentlemen, from Boston Massachusetts, we are Morphine, at your service..." - Mark Sandman (RIP )
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03-16-2006, 09:45 AM
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Me like track days
Join Date: Sep 2003
Location: Kirkland, WA
Posts: 10,209
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Drives well, no funny sounds at all that I can tell over the loud exhaust.
Been down on power for quite some time. Cars with known P/W ratios that are higer than the 930 at 418 rwhp were pulling away last summer. Thus, the dyno check late last year.
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ - "930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe Movie: 930 on the dyno |
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03-16-2006, 09:49 AM
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1982 Porsche 911 SC 3.6 L
914 2.0
944 Turbo
1986 Porsche 930
1977 Porsche 911 1978 3.0 SC
1987 Porsche 911 3.2
