24-08-2020, 06:56 PM
Hi,
The threads in my crankcases are 5/16" BSW.
The upper thread is approx 1/2" deep and runs out into the side of the casting so fitting a longer bolt will not work, This is the one that I have fitted a bellhousing stud into.
The lower hole is a 5/16" BSW and is tapped through, (This has been opened out on one of my crankcases so it can be through bolted.)
The crankcase in the car is also 5/16" BSW.
So 4/8" plus the startermotor flange thickness about 3/8" should give you the bolt length = 7/8"( ISH" )
If you have a welder you can make you own obstruction spanner.
The threads in my crankcases are 5/16" BSW.
The upper thread is approx 1/2" deep and runs out into the side of the casting so fitting a longer bolt will not work, This is the one that I have fitted a bellhousing stud into.
The lower hole is a 5/16" BSW and is tapped through, (This has been opened out on one of my crankcases so it can be through bolted.)
The crankcase in the car is also 5/16" BSW.
So 4/8" plus the startermotor flange thickness about 3/8" should give you the bolt length = 7/8"( ISH" )
If you have a welder you can make you own obstruction spanner.