Last time the heads were off the block the passenger side water jackets remained full after draining the cooling system. The Haynes manual only seems to mention one water gallery, that joins the two banks of cylinders, located high up at the back of the block ( too high to drain the passenger side water jacket into the drivers side ). Can anyone here advise on the location of any other water galleries that connect the water jackets of the two banks of cylinders?
 
Any help much appreciated, and a merry Christmas to all.
 
Regards, Mark.
 
 

Hi Mark
I recently took both heads off my 1972 "D" Port Essex (see inset) after draining block via Drain Plug on L bank and found block equally drained. In the unlikely event the Water Gallery design in my 165HP Block is different to the standard 144 HP Engines that made up more than 95% of the V6 Engines, I'd say you've got a blockage.
If block staying in chassis, good reason to remove all 4 core plugs, and hi-pressure wash your block while poking rods thru looking for blockages and general cleaning (first close off ALL oil holes, Cam Valley and bores)
If block coming out, send away for deep-tank "hot-soak-descale" with instructions to "rod-out" any obstructions)
Merry Xmas
Bernie

Re-think.........blocks must be different. My drain plug is on LH side. Yours must be RHS, as you said L bank stayed full of coolant

Thanks for the reply BEEVEE.
 
From memory, I would have just disconnected the bottom radiator hose from the water pump to drain the system. Where on the opposite side of the block is the drain plug located?
 
Happy new year to all.
 
Regards, Mark.

Mark, going on memory, look on LHS of block near Engine Mount area; drain plug looks like the head of a 6 sided bolt. May be brass and around 5/8 inch AF socket size
BV

Found it. Looking at the front of the engine the drain plug is on the gearbox side of, and close to, the oil filter.