I have read what I can find on the processes of running in a fully re-built motor (as against top-end-only re-builds).
There are some variations on the process and most point to the fact that the replacement parts these days (e.g., Nikasil and JE pistons) have finer tolerances and require a different approach from those recommended by Porsche 'back in the day'.
For example: http://www.early911sregistry.org/for...ighlight=Break
and: http://www.mototuneusa.com/break_in_secrets.htm
and of course Chap 6 of Wayne's book.
Common elements of the 'advice' given seem to be the importance of the first 20 minutes and 20 miles/40kms, the use of dino oil and changing oil and filter regularly, finding a long hill and going up and down that, and checking valve clearances and head torquing within the first 500-1000kms.
I know that this process can be over-thought, but would be most interested in any experience or advice that others have had on this important issue.
Thanks,
Merv
There are some variations on the process and most point to the fact that the replacement parts these days (e.g., Nikasil and JE pistons) have finer tolerances and require a different approach from those recommended by Porsche 'back in the day'.
For example: http://www.early911sregistry.org/for...ighlight=Break
and: http://www.mototuneusa.com/break_in_secrets.htm
and of course Chap 6 of Wayne's book.
Common elements of the 'advice' given seem to be the importance of the first 20 minutes and 20 miles/40kms, the use of dino oil and changing oil and filter regularly, finding a long hill and going up and down that, and checking valve clearances and head torquing within the first 500-1000kms.
I know that this process can be over-thought, but would be most interested in any experience or advice that others have had on this important issue.
Thanks,
Merv
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