Phil99vette

iTrader: (11)

We recently installed a 383 and are having some issues with the cooling system...

Motor:
New 2004+ LS6 Block
Eagle crank
Scat Rods
Diamond pistons
2002+ GM MLS Gaskets< Is there is different gasket I should run for the 2004>
AFR 205 heads
G5x3 cam
Stock water pump
90/90 setup
we also replaced the engine coolant temp sensor with a Carquest temp sensor

When we started it up for the first time, we added coolant as we normally do and everything looked fine
Engine coolant temps came up to operating temps normally but once it got to 180-190 where it should have stopped, it kept going up until it sat @ 225-235.

Things we noticed..
The system seemed like it had an excessive amount of air...
Upper radiator hose didn't seem like it was full of coolant
No coolant smell out of the exhaust
Oil pressure 55#
Every reading seems normal
Almost like something is blocking the coolant flow

Problem is the car warms up and won't move off of 230degrees, doesn't go higher or lower.

SSpdDmon

iTrader: (10)

Where are the fans set? Did you try a different t-stat or even no t-stat?

EightBall

It sounds like t-stat, fans, and/or air in the block to me...

Phil99vette

iTrader: (11)

Its almost like there is a pressure pocket, the upper radiator hose has very little coolant in it...
Phil

SSpdDmon

iTrader: (10)

Try having it flushed somewhere?

EightBall

I would not be surprised if this was your problem then.

Vote +1

Phil99vette

iTrader: (11)

This is a brand new engine, we've never had a problem before...could it be related to the crossover tube on the top of the engine?
Phil