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Registered
Join Date: Oct 2007
Location: Idaho
Posts: 194
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cam broke during install
How is this even possible? I was not even near the 110 ft lbs while tightening the nut and then it started getting loose again and then...
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05-20-2010, 09:22 AM
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Wow!!!
Is it a stock cam?
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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05-20-2010, 10:15 AM
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Infidel
Join Date: May 2006
Location: UK
Posts: 1,172
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Sorry to see that, i guess one bonus is that it didn't happen with the engine running!
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Jonathan. 87 930, 993 turbo engine, RS Tuning 520PS/515lbf-ft, Arrow Rods, ARP hardware, Solid lifters, G50-50, RS Flywheel, 890nm Sachs clutch, RSR coil overs all round, 993 C4 calipers front, 930 fronts on the rear, Ruf Speedlines..... Old 540 BMW, XB12S Modified, for being a total hooligan 
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05-20-2010, 10:23 AM
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SAIGON 68
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my 2 year old grandson broke my wifes' bowling ball.
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05-20-2010, 10:45 AM
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Registered
Join Date: Oct 2007
Location: Idaho
Posts: 194
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It was an SC profile from web cams. It was in the engine for years and then I sent it to web cams to get reconditioned and I was installing it again. They said they have never heard of this happening.
I had the torque wrench set for 110 but I am guessing I had about 75 on it at the time it broke. Yeah I guess it is better it broke now instead of later. So I will be getting a new SC cam from them. I will need to pay the core charge since I don't have a good cam to send them now. Does anyone have a SC cam good or bad I can send them for a core? |
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05-20-2010, 11:05 AM
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Registered
Join Date: Oct 2003
Location: Mount Pleasant, South Carolina
Posts: 14,252
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That's scary! I'd think about replacing both of them to be safe.
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05-20-2010, 04:52 PM
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Registered
Join Date: Oct 2007
Location: Idaho
Posts: 194
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Quote:
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05-20-2010, 05:10 PM
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Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,810
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Send both cams out and have them machined for the later style bolt?
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Don't feed the trolls. Don't quote the trolls  http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
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05-20-2010, 05:30 PM
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Registered
Join Date: Jul 2006
Location: S. Florida
Posts: 7,249
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It's possible it was overtightened by someone before you got the car and was tweaked.. and then let go on you.
Looks like black sand on the inside.. |
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05-20-2010, 06:01 PM
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Wo ist die Rennstrecke?
Join Date: Mar 2004
Location: St Johns, FL
Posts: 1,210
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Wow - I wouldn't do anything with those. Looks like new cams for you. Thank your lucky stars that happened now and not on the street. Think thousands of $$ repair....
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05-20-2010, 06:28 PM
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yep, im slow in the head
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wow thats nuts, i work on a lot of vw's and have seen 2 different guys snap cams in built VR6 motors but never any other car. sucks but good thing to happen before u started the motor.
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1978 911sc Targa - CNC plasma/router cut parts, tig welding, sheet metal work, VAG-COM, LM-1. let me know if u need something |
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05-20-2010, 06:32 PM
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Drive it like u stole it.
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First time I have heard of one breaking like that. I had the old style but changed to the later style with my current build. The later style has some challenges to getting the cams timed with a high lift cam though. Here is the thread on the topic
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____________________________ Bill Jones Jupiter, FL 77 Euro 911 3.0 Wide Body - under construction http://www.flickr.com/photos/rennsport/collections/72157618856489537/ |
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05-21-2010, 03:36 AM
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Navin Johnson
Join Date: Mar 2002
Location: Wantagh, NY
Posts: 8,810
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I actually had a cam break in the same fashion, was not too concerned regarding machining to the later style. Those cams ( the ones with modified nose) are still in use, and I'm not losing sleep over them
Figured after numerous installs and uncertain history of the cam a break from the root of the thread might possibly happen... Timing the cams is always a sort of zen like experience..... I'm posting from Huangshan, China so I figured I could say something like that 
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Don't feed the trolls. Don't quote the trolls http://www.southshoreperformanceny.com '69 911 GT-5 '75 914 GT-3 and others |
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05-21-2010, 05:01 AM
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1979 Porsche 930 3.4
plain jane
snowqueen
almost audi
MILWAUKEE VIBRATOR
BMW BOXER TWINS
MONSOON RUNNER
Porsche Monkey
Project Car
