So, I brought this up a while back and am now even further stumped. Still having overheating issues on long steep grades, when weather is anything but cold, particularly when cruiser isn't able to keep highway speed. Can usually keep it under control with full blast heaters but have had to pull over and let cool at idle. I live on the coast so it's usually not an issue until I go inland on road trips taking me over mountain passes. My last suspect was waterpump. Pulled it (Aisin) and it looked perfect, replaced it anyways with new Aisin. Here's the list:
-New 3 core all brass radiator (realize not the conductivity of Al, but can't be that bad).
-New Mr T T-stat
-Full Transmission flush
-New blue Aisin clutch
-Fan looks good
-Shroud in place
-Timing on spec
-Tested negative for CO2
Out of ideas. After pump replacement last night, I reduced coolant ratio way down and added a bottle of Water Wetter. Thinking of doing the HD clutch oil upgrade, adding additional push fan/fans, adding additional trans cooler.
-New 3 core all brass radiator (realize not the conductivity of Al, but can't be that bad).
-New Mr T T-stat
-Full Transmission flush
-New blue Aisin clutch
-Fan looks good
-Shroud in place
-Timing on spec
-Tested negative for CO2
Out of ideas. After pump replacement last night, I reduced coolant ratio way down and added a bottle of Water Wetter. Thinking of doing the HD clutch oil upgrade, adding additional push fan/fans, adding additional trans cooler.