Bad98SS

I just installed 225 trick flow heads on my ls1 and i went to put coolant in it and it leaked out of a hole on the side of the heads, does anybody know what that is or if i need to plug it with a pipe plug or a bolt and if so what size. It is on the passenger side of the car. Thanks.

99FormulaM6

iTrader: (21)

you need to take the plug out of your stock heads and put it in there. When I did my head swap, I put my coolant temp sensor there. Either will work.

Bad98SS

where is the coolant temp sensor at?

jabird

iTrader: (29)

On the passenger side you put the plug and on the driver side you put the temperature sensor from your stock heads.

LS-1Z28

iTrader: (6)

Here's a view from the driver's side...



The passenger side will need/have the plug towards the back since the heads from LH to RH are identical.

99FormulaM6

iTrader: (21)

and to clarify my post, I put my aftermarket temp sender there. the stock one stays in the driver side head

Chris05ssTruck

iTrader: (9)

Yes...what they said.

Darkman

iTrader: (2)

And when you get both those holes filled make sure you have cross over pipes or plugs on both front and rear of both heads.

Bad98SS

thanks for the help. got it figured out now on to the next problem. https://ls1tech.com/forums/fueling-i...-pressure.html

Bad98SS

thanks for all your help you people are awesome, leaks fixed, fuel pressure fixed, now no spark!these computer cars are something else, thanks again.bad 98ss" dad.