I originally published this article in 2012. Though I’ve made advancements in certain areas with all three of these heads, the basic info here is
Blueprint Specials. For the VW Bus owner who has everything… but a great set of heads!
Remanufacture of 356/912 Porsche cylinderheads is covered in this article.
These heads produced by AAPistons are knockoffs of the 039 101 371A heads that came on pre-smog 2.0 914/4’s. They are often referred to as
In 2007 we stopped servicing used VW T4 bus heads. By that time around half of the castings we saw had severe cracks down in
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
This article explores and unravels the mysteries surrounding the sometimes controversial issue of venting Type 4 cranckases, for street and track cars.