Oh, I forgot to add: when using the Indian sandwich type head gasket, you can soak it in a silicone base grout sealer or seal the exposed edges with Permetex Aviation gasket sealer to prevent coolant from wicking into the fabric(?) part of the gasket
Cheers
Hugh

Doggoneit Hugh!  And here I was, beating my head against the wall....trying to figure out HOW I still had a weeping leak from my head gasket!  Your thoughts here are much appreciated. 

You can place the pump on the return side of the system after the water has been cooled by the radiator.
The cooled water coming back to the engine usually does not exceed your max rating limit.
I use a standard Bell & Gosset water circulator on my Listeroid with no issues.

Yes, those are the parts I posted. You need a tappet and the top piece that receives the push rod. It is possible to remove the tappet without major disassembly but a bit tedious. You remove the clamp holding the tappet guides then twist and pry the exhaust tappet guide upwards and remove it. Then reach in and get the tappet. Do reverse to install.

@tyssniffen
When I was using a cooling tank the set-up was much like yours. My tank was a bit higher. The bottom fitting on the cooling tank was at least a foot above the bottom fitting on the engine. As a rule of thumb, about 2.6 column of water will give you approximately 1 psi of water pressure. Your cooling system would actually be a bit (just a bit) more efficient with the tank a bit higher. That said, if the circulation is working OK as it is, leave it alone! You are in the ball park.
Eventually, I replaced the 30 gallon cooling tank with a cast iron radiator, but that was for other reasons......less anti-freeze and a faster warm-up without using a thermostat.
Cheers
Hugh

Hello,

I am looking at some Grundfos hot water circulator pumps for the radiator on my Listeroid 10/1. The one that I am looking at is rated max temp of 150-degrees farenheit. Is that high enough to handle the ranges on my generator?

Thanks,

Jim