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-   -   How did I break my Cam Shafts (http://forums.pelicanparts.com/911-engine-rebuilding-forum/968128-how-did-i-break-my-cam-shafts.html)

smarens 08-28-2017 07:17 AM
How did I break my Cam Shafts
 
-disassembled 2.7 yesterday

-broke the end of the cam shaft off

-yes used the crow foot and socket from Pelican

-done 3-4 engines before with same tools, never had issues

-used (2) 2 foot long 1/2" drive ratchets

Steve@Rennsport 08-28-2017 10:55 AM
I doubt you damaged them.

Its more likely that they were stressed upon installation during the tightening process or perhaps they were dropped.

They are more fragile than people think.

Trackrash 08-28-2017 12:11 PM
Better now than on the track.

Show us a picture.

smarens 08-28-2017 01:45 PM
-will get a picture tomorrow

-I'm glad it happened also now, better than in my running rebuilt engine

Edoyle 08-28-2017 06:32 PM
Any knowledge of it having been reground in the past?

smarens 08-29-2017 02:47 AM
http://forums.pelicanparts.com/uploa...1504003598.jpg
http://forums.pelicanparts.com/uploa...1504003598.jpg

smarens 08-29-2017 02:48 AM
Quote:
Originally Posted by Edoyle (Post 9718236)
Any knowledge of it having been reground in the past?
- no idea, I bought it from a guy who bought it from a guy deal

- I will measure some of the lobes when I pull the cams from the cam housings

faapgar 08-29-2017 03:01 AM
broken cam
 
Over tightened from a previous installation.These cams are cast and not that strong.Fred

Steve@Rennsport 08-29-2017 08:05 AM
Quote:
Originally Posted by faapgar (Post 9718444)
Over tightened from a previous installation.These cams are cast and not that strong.Fred
Totally agree,...someone overtorqued them.

Trackrash 08-29-2017 08:43 AM
Is that why Porsche changed to the newer style bolt in the '80s?

Edoyle 08-29-2017 06:45 PM
If anything, this is a good reminder to torque the cam sprocket correctly instead of zapping it with an airgun as I have heard some people do (to remove and install).

smarens 08-30-2017 05:33 AM
thanks to everyone for response, figured it was not something I did but something the PO did

GotaT 08-30-2017 02:09 PM
Happened to me one time also..

smarens 08-30-2017 05:49 PM
Quote:
Originally Posted by GotaT (Post 9720687)
Happened to me one time also..
glad to hear, I don't like starting a new club or being in one all by myself

http://forums.pelicanparts.com/suppo.../smileysex.gif[img]

cgarr 09-01-2017 04:17 PM
Drill and thread, time to go with the bolt


Sent from my iPhone using Tapatalk

Catorce 09-01-2017 04:24 PM
Wow dude.

Have you considered an arm wrestling competition?

smarens 09-01-2017 04:34 PM
[QUOTE=cgarr;9723614]Drill and thread, time to go with the bolt


thanks Craig you can tell me all about it, coming to see you in the next few weeks and bringing you the heads from this build

smarens 09-01-2017 04:36 PM
Quote:
Originally Posted by Catorce (Post 9723632)
Wow dude.

Have you considered an arm wrestling competition?
really didn't crank that hard on them, put a lot more torque on other ones that didn't bust but came loose just fine

Catorce 09-01-2017 04:43 PM
Quote:
Originally Posted by smarens (Post 9723650)
really didn't crank that hard on them, put a lot more torque on other ones that didn't bust but came loose just fine
Just giving you a ribbing!


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