Re: Oil filter lines

Posted by HH56 On 2023/9/18 10:22:44

If you want to read a bit on the final version of early 356 plumbing changes and the implementation of filter return oil going directly to the crankcase check out the Aug 15, 43 Service Letter article on hydraulic valve tappets.

That plumbing layout was cleaned up and by the 24th series added to all engines with or without hydraulic lifters. The addition of a proper port located in the block casting to directly return oil to the crankcase was the final change.