Hi!
I have a 1977 911S With over 300000 miles on it, the car runs great and still is tight to drive.
However lately i have heard a knocking sound under load, its worst when the car is cold. And it looks like it leaks oil between the head and cylinder.
Looks like I have some broken head studs!
I am going to open the valvecovers tomorrow to check it out.
I have taken some photos of the crank case numbers and the cylinders, is it alusil or nicasil and is the case the original 1977 2,7S case?
Thanks!
Best regards!
Roar