Quote Originally Posted by Liquifire View Post
Yes, you will not be able to rev the car in park or neutral past somewhere in the 3500-4k range due to the rev limiter on all Grand Prixs of this era. I am stumped on why the radiator cracks but I would get a new radiator cap and double check the hose that goes to the coolant overflow tank for obstruction. What type of coolant are you using now? Did you purge the system of air first before driving it after replacing the radiator and the thermostat?
I understand the rev limiter, which is what I expected. As for the radiator, we did not replace the cap, but will the second time around. Not 100% sure if there are any obstructions, and I don't know if we bled the system correctly. I can tell you that the hoses pressurized, and I noticed that the bottom part of the upper hose was hotter than the rest...did open the bleeder on the thermostat housing when we were filling it with 50/50 mix from Prestone....