shutzero

so im going to be workingo n my friends 2006 grand prix on saturday...upper manifold gasket, t-stat, tranny service, and coolant flush...anything i should know about before digging into this one? is the manifold gasket/tsat hard to get to on these cars?

IROC403

iTrader: (2)

If its the 3800 it may not b the gasket its a warped/cracked manifold from the egr heat. parts stores stock them now (like$125) and they have a egr kit that puts the heat further inside the manifold that comes with it. easy fix though.

shutzero

all i know is my friend brought it to a garage, they diagnosed it and im just replacing what they were going to charge him for haha

2002_z28_m6

iTrader: (10)

Its has a rubber gasket that goes around it its like an oring. The easiest themostat you will ever change takes about 45 seconds.

ScreaminRedZ

iTrader: (3)

Yeah, the plastic manifolds are known to crack. Pressure test the coolant system and alot of times you can hear the coolant leaking into the intake.

shutzero

its not a plastic manifold on that car. we did pressure test the system and couldnt find any leaks