How did I break my Cam Shafts

[smarens]

-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]

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]

Better now than on the track.

Show us a picture.

[smarens]

-will get a picture tomorrow

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

[Edoyle]

Any knowledge of it having been reground in the past?

[smarens]

[smarens]

Originally Posted by Edoyle

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]

Over tightened from a previous installation.These cams are cast and not that strong.Fred

[Steve@Rennsport]

Originally Posted by faapgar

Over tightened from a previous installation.These cams are cast and not that strong.Fred

Totally agree,...someone overtorqued them.

[Trackrash]

Is that why Porsche changed to the newer style bolt in the '80s?

[Edoyle]

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]

thanks to everyone for response, figured it was not something I did but something the PO did

[GotaT]

Happened to me one time also..

[smarens]

Originally Posted by GotaT

Happened to me one time also..

glad to hear, I don't like starting a new club or being in one all by myself

[img]

[cgarr]

Drill and thread, time to go with the bolt


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[Catorce]

Wow dude.

Have you considered an arm wrestling competition?

[smarens]

[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]

Originally Posted by Catorce

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]

Originally Posted by smarens

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!