malibu, (and all).... thank you for the replies and suggestions. I took the truck to a "high end shop" and they did some diag on it , they determined that it was for sure mechanical. I took the truck to the engine builder and he agreed to revisit the engine. after his own diagnostics he agreed that it was mechanical, long story short it turned out to be a bad water pump (which was new from engine rebuild) replaced with a new auto store pump and it stays cool!!! now the truck runs at 190-200 with the AC on and in the latest temps ( phx AZ) of 105-112degrees! the history of the engine made it seem like it had to be a different issue than engine related - hence the run around with AC system, it was kinda a perfect storm of multiple things being installed and the temps still on the cooler side (mid 70's at time) so AC was not ran all time and not driving it real far.... this has been a very challenging build, but is starting to show signs of being worth it...
06-13-2024, 11:32 AM
Hybrid Mode
