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Old 07-19-2017, 09:49 PM   #20
eagleeyes221
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Join Date: Jan 2013
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Quote:
Originally Posted by Kingtal0n View Post

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.
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
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