Hey y'all so I need some help with this one, 04 Pontiac grand prix gtp I started this process because cooling system was super dirty/sludged so I flushed a bunch then found it wasn't holding pressure so I did the lower intake manifold gasket and found the usual breaks in the original plastic one they use, along with some milkshake on the coolant ports there, cleaned up and installed the fel pro metal substitute along with water pump radiator hoses and tensioner unit that has the heat hose ports/metal elbows. Also the coolant temp sensor. Put all back together and thought it was running great until I hit some traffic and temp gauge climbed few notches past half but went down when I got moving, then almost home my gauge never dropped it stayed around 3/4 like 2 notches from red but luckily made it home before getting actually red. Trans temp was also at 230 which is hotter than it's ever been, only drove like 30 miles too. 90 degree heat outside but still it's never gotten this hot before all my flushes and replacement parts. So now when trying to bleed I got basically continuous bubbles using the oem spill proof funnel, temp gauge at halfway but fans never kicked on so I shut it down, and then got over-flowed in the funnel. I've used the block tester kit before all this and it came back good with no exhaust gasses, also compression tested cylinders 1,2,3,5 and all held compression of 150psi, didn't get to 4&6 because tester wouldn't reach. I'm basically stumped here my neighbor thinks it's head gasket but people here say it's very hard to blow a head on these engines. Any ideas here before I rip it apart again for the head gasket? I've put a lot of time and money into this car already I need to have it running good any advice very appreciated thanks guys
