Originally Posted by GTgeezer
Hi that is an awesome DYI post thanks' somewhat related question. I have a 01 GT 4.6 2V and everything I have read 01 and newer 4.6's should have the PI intake with aluminum crossover and thermostat housing as shown in your pics. my car does not? it is all plastic. build date was 12/00. is this normal? also I have a very small weep on thermostat housing gasket. I will change. does not lose antifreeze or run hot or anything. it's actually just damp. also if I have an 01 there is no advantage of installing PI intake as it should be what I have already? or not. other then for the better aluminum crossover. thanks'
Either way, you have a PI intake manifold, i wouldnt worry about it too much whether its the plastic vs aluminum at this point. When you replace your gasket look for any signs or warping in the plastic where it mounts to the heads, it may not look like anything is leaking, but when you pull the intake you may see signs of it ready to start leaking. The aluminum crossover didnt really help warping issues, i warped mine 3-4 times with the aluminum crossover.