Quote:
Originally Posted by Kingtal0n
Alot of people miss, with the LS engine, two things you shouldn't do:
1. dont loop the heater core lines. Tap, and Plug them. This accounts for some overheating issues sometimes.
2. Dont tap the water pump for steam port lines. the steam port, 4-corner unit, needs to run to the upper radiator hose or tank (I put mine in the tank).
3. never block rear steam port lines in an engine swap.
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You are correct on number 2, number 3 can be done but anyone over 350hp at the crank the steam ports need to be connected in order to evenly pressurize the heads. Gm blocks the 2 rears from factory on most later ls series engines. As far as the first point you ALWAYS loop the coolant lines on the water pump. Read this
https://ls1tech.com/forums/generatio...nd-u-hose.html