[guye]

Had a related debate around my LS2 and removing the heater altogether. Do you block of the heater inlet/outlets or loop them? There are many peeps that have done either, and no one really reports any issues.

However my personal opinion (just logic-based and not mechanical-engineering-degree-based) was to install a loop. This is because as it bypasses the thermostat, i reckoned it would probably get the heated water to the thermostat more thoroughly and quickly, thereby opening the thermostat when it was expected to. Also the back pressure on the thermostat would be less.

I don't see (on my engine anyhow) that heater line doing anything else other than the interior heater, by the way.

Anyway, I'll shut up now, and als refer you to that Pirate4x4 site rebel1 mentioned. It is the ducks nuts! I've used that for so much info during my build it's not funny!