Hi everyone,
I have the standard B&S head gasket blow by between the piston and the rod chamber. I ordered a new copper gasket from Lani at CGI hoping that it would hold up better than the graphite POS, and was wondering how flat the head needs to be?
The engine block is dead flat, but the head has some minor out of flatness. I cleaned it down to the mill marks. It is totally flat where the gasket blew out, but on the opposite side of the cylinder it seems a little cupped. If I put a straight edge across the full width of the head, I can fit a 0.0025" feeler gauge under. If I just measure across the area where the gasket goes (it only extends 1/2" or so on the outside of the cylinder bore), I can fit a 0.0015" feeler gauge under.
Do I have to flatten that head? Since the copper gasket is reusable I can give it a try and see how it works, then if I have a leak, I could pull it apart again and flatten head…?
Any experiences or advice is appreciated!
I have the standard B&S head gasket blow by between the piston and the rod chamber. I ordered a new copper gasket from Lani at CGI hoping that it would hold up better than the graphite POS, and was wondering how flat the head needs to be?
The engine block is dead flat, but the head has some minor out of flatness. I cleaned it down to the mill marks. It is totally flat where the gasket blew out, but on the opposite side of the cylinder it seems a little cupped. If I put a straight edge across the full width of the head, I can fit a 0.0025" feeler gauge under. If I just measure across the area where the gasket goes (it only extends 1/2" or so on the outside of the cylinder bore), I can fit a 0.0015" feeler gauge under.
Do I have to flatten that head? Since the copper gasket is reusable I can give it a try and see how it works, then if I have a leak, I could pull it apart again and flatten head…?
Any experiences or advice is appreciated!