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Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,541
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964 Broken head stud
Has anybody ever heard of 964 broken head studs as a problem? Did they use Dilavar?
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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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12-07-2020, 08:33 AM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,523
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964 used 24 dilvars
Change them all out. Bruce |
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12-07-2020, 09:12 AM
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as Bruce said...it is weird they actually used them - mybe blind to the reports of problems..well? we will never know....
Ivan
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1985 911 with original 502 191 miles...808 198 km "The difference between genius and stupidity is that, genius has its limits". Albert Einstein. |
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12-07-2020, 10:08 AM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,492
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Found one once. They're getting old, like the early dilivar breaks.
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https://www.instagram.com/johnwalker8704 8009 103rd pl ne Marysville Wa 98270 206 637 4071 |
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12-07-2020, 11:59 AM
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Registered
Join Date: Oct 2001
Location: San Carlos, CA US
Posts: 5,541
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and that is why I asked. I have only heard of and seen them on SC and Carrera, not 964. So, I have to tear one down for a broken stud. Is there a commercially available work shop manual for the engine work? 12 spark plugs, 2 dizzies, and all.
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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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12-07-2020, 12:20 PM
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It's a 914 ...
Join Date: Jan 2008
Location: Ossining, NY
Posts: 4,751
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I understand that some shops still prefer to use dilivar studs, including on race engines. Is this just a case where some shops have different preferences from others? Do even the later, fully threaded dilivars age out?
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12-07-2020, 01:34 PM
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Racer
Join Date: Oct 2010
Location: Franklin, TN
Posts: 5,887
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The 993 Turbo head studs (Dilavar) are the best.....they are strong and the expansion rates are much closer to the aluminum than steel head studs.
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Scott Winders PCA GT3 #3 2021 & 2022 PCA GT3 National Champion 2021 & 2022 PCA West Coast Series GT3 Champion |
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12-07-2020, 02:00 PM
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Registered
Join Date: Sep 2007
Location: Boston, MA
Posts: 1,475
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Quote:
http://early911nzdownloads.yolasite.com/resources/964%20Volume%201.pdf Mark
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1979 911SC Targa |
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12-07-2020, 02:17 PM
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lake wales fla
Join Date: Feb 2017
Posts: 1,215
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I have seen only 2 over the years, one on a 1990 tip and one on a 1992 964 turbo.
Richard |
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12-07-2020, 06:39 PM
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