Re: 1961 LI Work in Progress
These two shots show how I expect to use studs to hold the head to the cylinder casting. On the left (exhaust side), I am showing the shorter studs (all studs are coarse thread into the cast iron and fine thread nuts) with the ANSI washer and nut and for the shroud stud, using a double nut and washer to fasten the shroud. On the right (intake side) I located some fine thread coupling nuts and would torque down the head and then add a short bolt to hold the shroud. The third method I came up with would be to use a long stud with a bottom nut torqued down and then a spacer (steel or aluminum) with a second nut to hold the shroud. Leaning to either #1 or #3. As I see it, the studs allow a more uniform clamping load on the head/gasket and should be easier to remove in the future. If a rust/corrosion problem develops you can always grind the top of the stud off with a die grinder to get rid of the rust in the threads and then the nut should just come right off. Studs are hardened and the nuts are grade 8 cad plated and will all get a liberal coat of hi-temp anti-seize paste.
Intake port already had coarse thread studs installed and from the looks of the port and the area around it this cylinder had been installed backwards and the port was actually used as the exhaust (and the valve was marked with "EX"). One of studs refused to come out so I plan on using them as is with self locking nuts. The now exhaust port (which does have a bronze guide) will have a set of coarse/fine studs installed and a double nut setup used to protect the threads from rust so removal of the exhaust manifold will be easier in the future. Again all threaded connections will get anti-seize.
And note; this cylinder is not going on the LI engine but rather I expect to install it on the 1969 L/C-8 hooked to the Sno-cannon due to a bad lack of power and a lot of blow by. The cylinder and piston are 0.020" OS and was almost unused so I just had the machine shop hone it for new chrome rings and hand lapped the valves w/ a new upper valve plate gasket. Should solve the power problem and be are relatively easy fix. Also, this setup is a trial for the LI engine on what works best.