new heads and studs & still 13 psi
i am asking this for a buddy . he just tore down his 05 350 6.0 and put new heads on from international , new gaskets , arp's , egr delete and turbo back exhaust . before all this work he had the psi gauge hooked up to coolant system to check pressure and left it installed after work was completed . he was telling me today that since the work he's seen 6-8 psi then the next week 9 -11 psi and now 13 psi in the coolant system . he says its not jumping around our climbing fast but it slowly climbs to 12 - 13 psi and stays there . the first thing that came to my mind was if the new heads he got from international were not flat enough for a good seal on the gaskets .
is there anything else it could be ? any input on this will be greatly appreciated as he is a little upset about throwing 10 grand at the truck and he still doesnt have confidence in it . thanx .