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-   -   Best way to check if the timing Z1 mark is off? (http://forums.pelicanparts.com/porsche-911-technical-forum/678723-best-way-check-if-timing-z1-mark-off.html)

beschouten 05-18-2012 05:42 PM
Best way to check if the timing Z1 mark is off?
 
I think my timing mark is off, a previous owner had replaced the chain tensioners and it runs bad if not significantly advanced at idle. What could I do to see if the timing position is correct? 79 SC

Scott R 05-18-2012 05:53 PM
Well the timing mark/pulley is keyed to the crankshaft, you would need to check the cam timing individually.

beschouten 05-18-2012 06:03 PM
Could I tell enough from having the valve cover off or am I talking about taking the motor out? If the cam was shimmed how could I tell?

Thanks in advance!

timmy2 05-18-2012 06:39 PM
Pelican Technical Article: Setting and Adjusting the Cam Timing - 911 (1965-89) - 930 Turbo (1975-89)
Wayne's rebuilding book helps a lot too.

beschouten 05-18-2012 07:20 PM
Quote:
Originally Posted by timmy2 (Post 6755986)
This is exactly what I'm looking for. I'll look for the valve lift overlap "intersection" on both cams and see if it aligns with Z1.

Thanks!

Brian


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