This article explores and unravels the mysteries surrounding the sometimes controversial issue of venting Type 4 cranckases, for street and track cars.
Category: Porsche
All things Porsche
M96 & M97 PORSCHE CYLINDER HEAD SPECIFICATIONS AND GENERAL INFO.
M96/97 Valve Sizes, Chamber Volumes, Component details, Failure Types, Misc. Info.
Porsche M96 M97 Exhaust bolt removal
We see an awful lot of busted exhaust bolts in these heads. And we see a lot of failed repairs. We also see a lot
A Tale Of Three Heads:The 3.4l Porsche Lineage M96,M97,9A1
I originally published this article in 2012. Though I’ve made major advancements in certain areas with all three of these heads, the basic info here
996 Cylinder Head Crack Repair
We have seen cylinderhead cracks in all models of M96 engines used in 986 Boxsters and 996 911’s up to and including model year 2001,
Why do 996 911 Porsche cylinder heads Crack?
Click here to see video of a 996 3.4 M96 head being pressure tested, revealing a microscopic crack that was not visible to the naked
Hoffman Automotive Machine (706)769-3783 
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