Hey guys,  I need a little help.  I bought a 240z with a seized engine a few months ago.   It's almost time to start it up but I need some help with coolant hoses on the drive side.  The car came with a copper pipe from the crossover over pipe to a bent hose to thermostat.    It doesn't look right at all.   Keep in mind that my engine has triple weber set up.   Are the stock carbs or intake watercooled? If so , since I will not need the piping, can bypass that side completely?   I was thinking of capping off the thermostat fitting and around the crossover pipe passed the heater core.  I think I will still have heat.   Unless the poor circulation will kill that thought.  Thanks in advance and  Excuse my ignorance  

Yeah, you can cap it at the thermostat housing and then the passenger's side "y" fitting between cylinder 5 & 6.

I have original SUs and chose to block that line to prevent any future leaking.  Doesn't get very cold down here.  Car runs fine, nice and cool without it.  About 175 degrees.  I read a story on here where a guy romped on his before the thermostat was open and blew out a rear freeze plug.  So just to be safe I always wait until it gets up to temp before running it up.  My thinking is/was that coolant line is always open and deleting it severely cuts my coolant flow before the thermostat opens up.  Maybe wrong, most likely is, but that's me. 

 

Excellcent!  thank you so much siteunseen

 

The tube that runs around the back is larger diameter than the tube that runs through the intake manifold. If you run a hose from the thermostat housing around to the heater Y-pipe you're going to be sending more coolant around at all times, bypassing the radiator, than the stock intake heating system would when it's thermostat is open. A way around this is put a restrictor in the line. Maybe jamming a socket inside the hose would work.